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-*- Mode: js; js-indent-level: 2; -*- */\n/*\n * Copyright 2011 Mozilla Foundation and contributors\n * Licensed under the New BSD license. See LICENSE or:\n * http://opensource.org/licenses/BSD-3-Clause\n */\n\n/**\n * This is a helper function for getting values from parameter/options\n * objects.\n *\n * @param args The object we are extracting values from\n * @param name The name of the property we are getting.\n * @param defaultValue An optional value to return if the property is missing\n * from the object. If this is not specified and the property is missing, an\n * error will be thrown.\n */\nfunction getArg(aArgs, aName, aDefaultValue) {\n  if (aName in aArgs) {\n    return aArgs[aName];\n  } else if (arguments.length === 3) {\n    return aDefaultValue;\n  } else {\n    throw new Error('\"' + aName + '\" is a required argument.');\n  }\n}\nexports.getArg = getArg;\n\nvar urlRegexp = /^(?:([\\w+\\-.]+):)?\\/\\/(?:(\\w+:\\w+)@)?([\\w.-]*)(?::(\\d+))?(.*)$/;\nvar dataUrlRegexp = /^data:.+\\,.+$/;\n\nfunction urlParse(aUrl) {\n  var match = aUrl.match(urlRegexp);\n  if (!match) {\n    return null;\n  }\n  return {\n    scheme: match[1],\n    auth: match[2],\n    host: match[3],\n    port: match[4],\n    path: match[5]\n  };\n}\nexports.urlParse = urlParse;\n\nfunction urlGenerate(aParsedUrl) {\n  var url = '';\n  if (aParsedUrl.scheme) {\n    url += aParsedUrl.scheme + ':';\n  }\n  url += '//';\n  if (aParsedUrl.auth) {\n    url += aParsedUrl.auth + '@';\n  }\n  if (aParsedUrl.host) {\n    url += aParsedUrl.host;\n  }\n  if (aParsedUrl.port) {\n    url += \":\" + aParsedUrl.port\n  }\n  if (aParsedUrl.path) {\n    url += aParsedUrl.path;\n  }\n  return url;\n}\nexports.urlGenerate = urlGenerate;\n\n/**\n * Normalizes a path, or the path portion of a URL:\n *\n * - Replaces consecutive slashes with one slash.\n * - Removes unnecessary '.' parts.\n * - Removes unnecessary '<dir>/..' parts.\n *\n * Based on code in the Node.js 'path' core module.\n *\n * @param aPath The path or url to normalize.\n */\nfunction normalize(aPath) {\n  var path = aPath;\n  var url = urlParse(aPath);\n  if (url) {\n    if (!url.path) {\n      return aPath;\n    }\n    path = url.path;\n  }\n  var isAbsolute = exports.isAbsolute(path);\n\n  var parts = path.split(/\\/+/);\n  for (var part, up = 0, i = parts.length - 1; i >= 0; i--) {\n    part = parts[i];\n    if (part === '.') {\n      parts.splice(i, 1);\n    } else if (part === '..') {\n      up++;\n    } else if (up > 0) {\n      if (part === '') {\n        // The first part is blank if the path is absolute. Trying to go\n        // above the root is a no-op. Therefore we can remove all '..' parts\n        // directly after the root.\n        parts.splice(i + 1, up);\n        up = 0;\n      } else {\n        parts.splice(i, 2);\n        up--;\n      }\n    }\n  }\n  path = parts.join('/');\n\n  if (path === '') {\n    path = isAbsolute ? '/' : '.';\n  }\n\n  if (url) {\n    url.path = path;\n    return urlGenerate(url);\n  }\n  return path;\n}\nexports.normalize = normalize;\n\n/**\n * Joins two paths/URLs.\n *\n * @param aRoot The root path or URL.\n * @param aPath The path or URL to be joined with the root.\n *\n * - If aPath is a URL or a data URI, aPath is returned, unless aPath is a\n *   scheme-relative URL: Then the scheme of aRoot, if any, is prepended\n *   first.\n * - Otherwise aPath is a path. If aRoot is a URL, then its path portion\n *   is updated with the result and aRoot is returned. Otherwise the result\n *   is returned.\n *   - If aPath is absolute, the result is aPath.\n *   - Otherwise the two paths are joined with a slash.\n * - Joining for example 'http://' and 'www.example.com' is also supported.\n */\nfunction join(aRoot, aPath) {\n  if (aRoot === \"\") {\n    aRoot = \".\";\n  }\n  if (aPath === \"\") {\n    aPath = \".\";\n  }\n  var aPathUrl = urlParse(aPath);\n  var aRootUrl = urlParse(aRoot);\n  if (aRootUrl) {\n    aRoot = aRootUrl.path || '/';\n  }\n\n  // `join(foo, '//www.example.org')`\n  if (aPathUrl && !aPathUrl.scheme) {\n    if (aRootUrl) {\n      aPathUrl.scheme = aRootUrl.scheme;\n    }\n    return urlGenerate(aPathUrl);\n  }\n\n  if (aPathUrl || aPath.match(dataUrlRegexp)) {\n    return aPath;\n  }\n\n  // `join('http://', 'www.example.com')`\n  if (aRootUrl && !aRootUrl.host && !aRootUrl.path) {\n    aRootUrl.host = aPath;\n    return urlGenerate(aRootUrl);\n  }\n\n  var joined = aPath.charAt(0) === '/'\n    ? aPath\n    : normalize(aRoot.replace(/\\/+$/, '') + '/' + aPath);\n\n  if (aRootUrl) {\n    aRootUrl.path = joined;\n    return urlGenerate(aRootUrl);\n  }\n  return joined;\n}\nexports.join = join;\n\nexports.isAbsolute = function (aPath) {\n  return aPath.charAt(0) === '/' || urlRegexp.test(aPath);\n};\n\n/**\n * Make a path relative to a URL or another path.\n *\n * @param aRoot The root path or URL.\n * @param aPath The path or URL to be made relative to aRoot.\n */\nfunction relative(aRoot, aPath) {\n  if (aRoot === \"\") {\n    aRoot = \".\";\n  }\n\n  aRoot = aRoot.replace(/\\/$/, '');\n\n  // It is possible for the path to be above the root. In this case, simply\n  // checking whether the root is a prefix of the path won't work. Instead, we\n  // need to remove components from the root one by one, until either we find\n  // a prefix that fits, or we run out of components to remove.\n  var level = 0;\n  while (aPath.indexOf(aRoot + '/') !== 0) {\n    var index = aRoot.lastIndexOf(\"/\");\n    if (index < 0) {\n      return aPath;\n    }\n\n    // If the only part of the root that is left is the scheme (i.e. http://,\n    // file:///, etc.), one or more slashes (/), or simply nothing at all, we\n    // have exhausted all components, so the path is not relative to the root.\n    aRoot = aRoot.slice(0, index);\n    if (aRoot.match(/^([^\\/]+:\\/)?\\/*$/)) {\n      return aPath;\n    }\n\n    ++level;\n  }\n\n  // Make sure we add a \"../\" for each component we removed from the root.\n  return Array(level + 1).join(\"../\") + aPath.substr(aRoot.length + 1);\n}\nexports.relative = relative;\n\nvar supportsNullProto = (function () {\n  var obj = Object.create(null);\n  return !('__proto__' in obj);\n}());\n\nfunction identity (s) {\n  return s;\n}\n\n/**\n * Because behavior goes wacky when you set `__proto__` on objects, we\n * have to prefix all the strings in our set with an arbitrary character.\n *\n * See https://github.com/mozilla/source-map/pull/31 and\n * https://github.com/mozilla/source-map/issues/30\n *\n * @param String aStr\n */\nfunction toSetString(aStr) {\n  if (isProtoString(aStr)) {\n    return '$' + aStr;\n  }\n\n  return aStr;\n}\nexports.toSetString = supportsNullProto ? identity : toSetString;\n\nfunction fromSetString(aStr) {\n  if (isProtoString(aStr)) {\n    return aStr.slice(1);\n  }\n\n  return aStr;\n}\nexports.fromSetString = supportsNullProto ? identity : fromSetString;\n\nfunction isProtoString(s) {\n  if (!s) {\n    return false;\n  }\n\n  var length = s.length;\n\n  if (length < 9 /* \"__proto__\".length */) {\n    return false;\n  }\n\n  if (s.charCodeAt(length - 1) !== 95  /* '_' */ ||\n      s.charCodeAt(length - 2) !== 95  /* '_' */ ||\n      s.charCodeAt(length - 3) !== 111 /* 'o' */ ||\n      s.charCodeAt(length - 4) !== 116 /* 't' */ ||\n      s.charCodeAt(length - 5) !== 111 /* 'o' */ ||\n      s.charCodeAt(length - 6) !== 114 /* 'r' */ ||\n      s.charCodeAt(length - 7) !== 112 /* 'p' */ ||\n      s.charCodeAt(length - 8) !== 95  /* '_' */ ||\n      s.charCodeAt(length - 9) !== 95  /* '_' */) {\n    return false;\n  }\n\n  for (var i = length - 10; i >= 0; i--) {\n    if (s.charCodeAt(i) !== 36 /* '$' */) {\n      return false;\n    }\n  }\n\n  return true;\n}\n\n/**\n * Comparator between two mappings where the original positions are compared.\n *\n * Optionally pass in `true` as `onlyCompareGenerated` to consider two\n * mappings with the same original source/line/column, but different generated\n * line and column the same. Useful when searching for a mapping with a\n * stubbed out mapping.\n */\nfunction compareByOriginalPositions(mappingA, mappingB, onlyCompareOriginal) {\n  var cmp = strcmp(mappingA.source, mappingB.source);\n  if (cmp !== 0) {\n    return cmp;\n  }\n\n  cmp = mappingA.originalLine - mappingB.originalLine;\n  if (cmp !== 0) {\n    return cmp;\n  }\n\n  cmp = mappingA.originalColumn - mappingB.originalColumn;\n  if (cmp !== 0 || onlyCompareOriginal) {\n    return cmp;\n  }\n\n  cmp = mappingA.generatedColumn - mappingB.generatedColumn;\n  if (cmp !== 0) {\n    return cmp;\n  }\n\n  cmp = mappingA.generatedLine - mappingB.generatedLine;\n  if (cmp !== 0) {\n    return cmp;\n  }\n\n  return strcmp(mappingA.name, mappingB.name);\n}\nexports.compareByOriginalPositions = compareByOriginalPositions;\n\n/**\n * Comparator between two mappings with deflated source and name indices where\n * the generated positions are compared.\n *\n * Optionally pass in `true` as `onlyCompareGenerated` to consider two\n * mappings with the same generated line and column, but different\n * source/name/original line and column the same. Useful when searching for a\n * mapping with a stubbed out mapping.\n */\nfunction compareByGeneratedPositionsDeflated(mappingA, mappingB, onlyCompareGenerated) {\n  var cmp = mappingA.generatedLine - mappingB.generatedLine;\n  if (cmp !== 0) {\n    return cmp;\n  }\n\n  cmp = mappingA.generatedColumn - mappingB.generatedColumn;\n  if (cmp !== 0 || onlyCompareGenerated) {\n    return cmp;\n  }\n\n  cmp = strcmp(mappingA.source, mappingB.source);\n  if (cmp !== 0) {\n    return cmp;\n  }\n\n  cmp = mappingA.originalLine - mappingB.originalLine;\n  if (cmp !== 0) {\n    return cmp;\n  }\n\n  cmp = mappingA.originalColumn - mappingB.originalColumn;\n  if (cmp !== 0) {\n    return cmp;\n  }\n\n  return strcmp(mappingA.name, mappingB.name);\n}\nexports.compareByGeneratedPositionsDeflated = compareByGeneratedPositionsDeflated;\n\nfunction strcmp(aStr1, aStr2) {\n  if (aStr1 === aStr2) {\n    return 0;\n  }\n\n  if (aStr1 === null) {\n    return 1; // aStr2 !== null\n  }\n\n  if (aStr2 === null) {\n    return -1; // aStr1 !== null\n  }\n\n  if (aStr1 > aStr2) {\n    return 1;\n  }\n\n  return -1;\n}\n\n/**\n * Comparator between two mappings with inflated source and name strings where\n * the generated positions are compared.\n */\nfunction compareByGeneratedPositionsInflated(mappingA, mappingB) {\n  var cmp = mappingA.generatedLine - mappingB.generatedLine;\n  if (cmp !== 0) {\n    return cmp;\n  }\n\n  cmp = mappingA.generatedColumn - mappingB.generatedColumn;\n  if (cmp !== 0) {\n    return cmp;\n  }\n\n  cmp = strcmp(mappingA.source, mappingB.source);\n  if (cmp !== 0) {\n    return cmp;\n  }\n\n  cmp = mappingA.originalLine - mappingB.originalLine;\n  if (cmp !== 0) {\n    return cmp;\n  }\n\n  cmp = mappingA.originalColumn - mappingB.originalColumn;\n  if (cmp !== 0) {\n    return cmp;\n  }\n\n  return strcmp(mappingA.name, mappingB.name);\n}\nexports.compareByGeneratedPositionsInflated = compareByGeneratedPositionsInflated;\n\n/**\n * Strip any JSON XSSI avoidance prefix from the string (as documented\n * in the source maps specification), and then parse the string as\n * JSON.\n */\nfunction parseSourceMapInput(str) {\n  return JSON.parse(str.replace(/^\\)]}'[^\\n]*\\n/, ''));\n}\nexports.parseSourceMapInput = parseSourceMapInput;\n\n/**\n * Compute the URL of a source given the the source root, the source's\n * URL, and the source map's URL.\n */\nfunction computeSourceURL(sourceRoot, sourceURL, sourceMapURL) {\n  sourceURL = sourceURL || '';\n\n  if (sourceRoot) {\n    // This follows what Chrome does.\n    if (sourceRoot[sourceRoot.length - 1] !== '/' && sourceURL[0] !== '/') {\n      sourceRoot += '/';\n    }\n    // The spec says:\n    //   Line 4: An optional source root, useful for relocating source\n    //   files on a server or removing repeated values in the\n    //   “sources” entry.  This value is prepended to the individual\n    //   entries in the “source” field.\n    sourceURL = sourceRoot + sourceURL;\n  }\n\n  // Historically, SourceMapConsumer did not take the sourceMapURL as\n  // a parameter.  This mode is still somewhat supported, which is why\n  // this code block is conditional.  However, it's preferable to pass\n  // the source map URL to SourceMapConsumer, so that this function\n  // can implement the source URL resolution algorithm as outlined in\n  // the spec.  This block is basically the equivalent of:\n  //    new URL(sourceURL, sourceMapURL).toString()\n  // ... except it avoids using URL, which wasn't available in the\n  // older releases of node still supported by this library.\n  //\n  // The spec says:\n  //   If the sources are not absolute URLs after prepending of the\n  //   “sourceRoot”, the sources are resolved relative to the\n  //   SourceMap (like resolving script src in a html document).\n  if (sourceMapURL) {\n    var parsed = urlParse(sourceMapURL);\n    if (!parsed) {\n      throw new Error(\"sourceMapURL could not be parsed\");\n    }\n    if (parsed.path) {\n      // Strip the last path component, but keep the \"/\".\n      var index = parsed.path.lastIndexOf('/');\n      if (index >= 0) {\n        parsed.path = parsed.path.substring(0, index + 1);\n      }\n    }\n    sourceURL = join(urlGenerate(parsed), sourceURL);\n  }\n\n  return normalize(sourceURL);\n}\nexports.computeSourceURL = computeSourceURL;\n","/* -*- Mode: js; js-indent-level: 2; -*- */\n/*\n * Copyright 2011 Mozilla Foundation and contributors\n * Licensed under the New BSD license. See LICENSE or:\n * http://opensource.org/licenses/BSD-3-Clause\n */\n\nvar intToCharMap = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'.split('');\n\n/**\n * Encode an integer in the range of 0 to 63 to a single base 64 digit.\n */\nexports.encode = function (number) {\n  if (0 <= number && number < intToCharMap.length) {\n    return intToCharMap[number];\n  }\n  throw new TypeError(\"Must be between 0 and 63: \" + number);\n};\n\n/**\n * Decode a single base 64 character code digit to an integer. Returns -1 on\n * failure.\n */\nexports.decode = function (charCode) {\n  var bigA = 65;     // 'A'\n  var bigZ = 90;     // 'Z'\n\n  var littleA = 97;  // 'a'\n  var littleZ = 122; // 'z'\n\n  var zero = 48;     // '0'\n  var nine = 57;     // '9'\n\n  var plus = 43;     // '+'\n  var slash = 47;    // '/'\n\n  var littleOffset = 26;\n  var numberOffset = 52;\n\n  // 0 - 25: ABCDEFGHIJKLMNOPQRSTUVWXYZ\n  if (bigA <= charCode && charCode <= bigZ) {\n    return (charCode - bigA);\n  }\n\n  // 26 - 51: abcdefghijklmnopqrstuvwxyz\n  if (littleA <= charCode && charCode <= littleZ) {\n    return (charCode - littleA + littleOffset);\n  }\n\n  // 52 - 61: 0123456789\n  if (zero <= charCode && charCode <= nine) {\n    return (charCode - zero + numberOffset);\n  }\n\n  // 62: +\n  if (charCode == plus) {\n    return 62;\n  }\n\n  // 63: /\n  if (charCode == slash) {\n    return 63;\n  }\n\n  // Invalid base64 digit.\n  return -1;\n};\n","/* -*- Mode: js; js-indent-level: 2; -*- */\n/*\n * Copyright 2011 Mozilla Foundation and contributors\n * Licensed under the New BSD license. See LICENSE or:\n * http://opensource.org/licenses/BSD-3-Clause\n */\n\nvar util = require('./util');\nvar has = Object.prototype.hasOwnProperty;\nvar hasNativeMap = typeof Map !== \"undefined\";\n\n/**\n * A data structure which is a combination of an array and a set. Adding a new\n * member is O(1), testing for membership is O(1), and finding the index of an\n * element is O(1). Removing elements from the set is not supported. Only\n * strings are supported for membership.\n */\nfunction ArraySet() {\n  this._array = [];\n  this._set = hasNativeMap ? new Map() : Object.create(null);\n}\n\n/**\n * Static method for creating ArraySet instances from an existing array.\n */\nArraySet.fromArray = function ArraySet_fromArray(aArray, aAllowDuplicates) {\n  var set = new ArraySet();\n  for (var i = 0, len = aArray.length; i < len; i++) {\n    set.add(aArray[i], aAllowDuplicates);\n  }\n  return set;\n};\n\n/**\n * Return how many unique items are in this ArraySet. If duplicates have been\n * added, than those do not count towards the size.\n *\n * @returns Number\n */\nArraySet.prototype.size = function ArraySet_size() {\n  return hasNativeMap ? this._set.size : Object.getOwnPropertyNames(this._set).length;\n};\n\n/**\n * Add the given string to this set.\n *\n * @param String aStr\n */\nArraySet.prototype.add = function ArraySet_add(aStr, aAllowDuplicates) {\n  var sStr = hasNativeMap ? aStr : util.toSetString(aStr);\n  var isDuplicate = hasNativeMap ? this.has(aStr) : has.call(this._set, sStr);\n  var idx = this._array.length;\n  if (!isDuplicate || aAllowDuplicates) {\n    this._array.push(aStr);\n  }\n  if (!isDuplicate) {\n    if (hasNativeMap) {\n      this._set.set(aStr, idx);\n    } else {\n      this._set[sStr] = idx;\n    }\n  }\n};\n\n/**\n * Is the given string a member of this set?\n *\n * @param String aStr\n */\nArraySet.prototype.has = function ArraySet_has(aStr) {\n  if (hasNativeMap) {\n    return this._set.has(aStr);\n  } else {\n    var sStr = util.toSetString(aStr);\n    return has.call(this._set, sStr);\n  }\n};\n\n/**\n * What is the index of the given string in the array?\n *\n * @param String aStr\n */\nArraySet.prototype.indexOf = function ArraySet_indexOf(aStr) {\n  if (hasNativeMap) {\n    var idx = this._set.get(aStr);\n    if (idx >= 0) {\n        return idx;\n    }\n  } else {\n    var sStr = util.toSetString(aStr);\n    if (has.call(this._set, sStr)) {\n      return this._set[sStr];\n    }\n  }\n\n  throw new Error('\"' + aStr + '\" is not in the set.');\n};\n\n/**\n * What is the element at the given index?\n *\n * @param Number aIdx\n */\nArraySet.prototype.at = function ArraySet_at(aIdx) {\n  if (aIdx >= 0 && aIdx < this._array.length) {\n    return this._array[aIdx];\n  }\n  throw new Error('No element indexed by ' + aIdx);\n};\n\n/**\n * Returns the array representation of this set (which has the proper indices\n * indicated by indexOf). Note that this is a copy of the internal array used\n * for storing the members so that no one can mess with internal state.\n */\nArraySet.prototype.toArray = function ArraySet_toArray() {\n  return this._array.slice();\n};\n\nexports.ArraySet = ArraySet;\n","/* -*- Mode: js; js-indent-level: 2; -*- */\n/*\n * Copyright 2011 Mozilla Foundation and contributors\n * Licensed under the New BSD license. See LICENSE or:\n * http://opensource.org/licenses/BSD-3-Clause\n */\n\nvar base64VLQ = require('./base64-vlq');\nvar util = require('./util');\nvar ArraySet = require('./array-set').ArraySet;\nvar MappingList = require('./mapping-list').MappingList;\n\n/**\n * An instance of the SourceMapGenerator represents a source map which is\n * being built incrementally. You may pass an object with the following\n * properties:\n *\n *   - file: The filename of the generated source.\n *   - sourceRoot: A root for all relative URLs in this source map.\n */\nfunction SourceMapGenerator(aArgs) {\n  if (!aArgs) {\n    aArgs = {};\n  }\n  this._file = util.getArg(aArgs, 'file', null);\n  this._sourceRoot = util.getArg(aArgs, 'sourceRoot', null);\n  this._skipValidation = util.getArg(aArgs, 'skipValidation', false);\n  this._sources = new ArraySet();\n  this._names = new ArraySet();\n  this._mappings = new MappingList();\n  this._sourcesContents = null;\n}\n\nSourceMapGenerator.prototype._version = 3;\n\n/**\n * Creates a new SourceMapGenerator based on a SourceMapConsumer\n *\n * @param aSourceMapConsumer The SourceMap.\n */\nSourceMapGenerator.fromSourceMap =\n  function SourceMapGenerator_fromSourceMap(aSourceMapConsumer) {\n    var sourceRoot = aSourceMapConsumer.sourceRoot;\n    var generator = new SourceMapGenerator({\n      file: aSourceMapConsumer.file,\n      sourceRoot: sourceRoot\n    });\n    aSourceMapConsumer.eachMapping(function (mapping) {\n      var newMapping = {\n        generated: {\n          line: mapping.generatedLine,\n          column: mapping.generatedColumn\n        }\n      };\n\n      if (mapping.source != null) {\n        newMapping.source = mapping.source;\n        if (sourceRoot != null) {\n          newMapping.source = util.relative(sourceRoot, newMapping.source);\n        }\n\n        newMapping.original = {\n          line: mapping.originalLine,\n          column: mapping.originalColumn\n        };\n\n        if (mapping.name != null) {\n          newMapping.name = mapping.name;\n        }\n      }\n\n      generator.addMapping(newMapping);\n    });\n    aSourceMapConsumer.sources.forEach(function (sourceFile) {\n      var sourceRelative = sourceFile;\n      if (sourceRoot !== null) {\n        sourceRelative = util.relative(sourceRoot, sourceFile);\n      }\n\n      if (!generator._sources.has(sourceRelative)) {\n        generator._sources.add(sourceRelative);\n      }\n\n      var content = aSourceMapConsumer.sourceContentFor(sourceFile);\n      if (content != null) {\n        generator.setSourceContent(sourceFile, content);\n      }\n    });\n    return generator;\n  };\n\n/**\n * Add a single mapping from original source line and column to the generated\n * source's line and column for this source map being created. The mapping\n * object should have the following properties:\n *\n *   - generated: An object with the generated line and column positions.\n *   - original: An object with the original line and column positions.\n *   - source: The original source file (relative to the sourceRoot).\n *   - name: An optional original token name for this mapping.\n */\nSourceMapGenerator.prototype.addMapping =\n  function SourceMapGenerator_addMapping(aArgs) {\n    var generated = util.getArg(aArgs, 'generated');\n    var original = util.getArg(aArgs, 'original', null);\n    var source = util.getArg(aArgs, 'source', null);\n    var name = util.getArg(aArgs, 'name', null);\n\n    if (!this._skipValidation) {\n      this._validateMapping(generated, original, source, name);\n    }\n\n    if (source != null) {\n      source = String(source);\n      if (!this._sources.has(source)) {\n        this._sources.add(source);\n      }\n    }\n\n    if (name != null) {\n      name = String(name);\n      if (!this._names.has(name)) {\n        this._names.add(name);\n      }\n    }\n\n    this._mappings.add({\n      generatedLine: generated.line,\n      generatedColumn: generated.column,\n      originalLine: original != null && original.line,\n      originalColumn: original != null && original.column,\n      source: source,\n      name: name\n    });\n  };\n\n/**\n * Set the source content for a source file.\n */\nSourceMapGenerator.prototype.setSourceContent =\n  function SourceMapGenerator_setSourceContent(aSourceFile, aSourceContent) {\n    var source = aSourceFile;\n    if (this._sourceRoot != null) {\n      source = util.relative(this._sourceRoot, source);\n    }\n\n    if (aSourceContent != null) {\n      // Add the source content to the _sourcesContents map.\n      // Create a new _sourcesContents map if the property is null.\n      if (!this._sourcesContents) {\n        this._sourcesContents = Object.create(null);\n      }\n      this._sourcesContents[util.toSetString(source)] = aSourceContent;\n    } else if (this._sourcesContents) {\n      // Remove the source file from the _sourcesContents map.\n      // If the _sourcesContents map is empty, set the property to null.\n      delete this._sourcesContents[util.toSetString(source)];\n      if (Object.keys(this._sourcesContents).length === 0) {\n        this._sourcesContents = null;\n      }\n    }\n  };\n\n/**\n * Applies the mappings of a sub-source-map for a specific source file to the\n * source map being generated. Each mapping to the supplied source file is\n * rewritten using the supplied source map. Note: The resolution for the\n * resulting mappings is the minimium of this map and the supplied map.\n *\n * @param aSourceMapConsumer The source map to be applied.\n * @param aSourceFile Optional. The filename of the source file.\n *        If omitted, SourceMapConsumer's file property will be used.\n * @param aSourceMapPath Optional. The dirname of the path to the source map\n *        to be applied. If relative, it is relative to the SourceMapConsumer.\n *        This parameter is needed when the two source maps aren't in the same\n *        directory, and the source map to be applied contains relative source\n *        paths. If so, those relative source paths need to be rewritten\n *        relative to the SourceMapGenerator.\n */\nSourceMapGenerator.prototype.applySourceMap =\n  function SourceMapGenerator_applySourceMap(aSourceMapConsumer, aSourceFile, aSourceMapPath) {\n    var sourceFile = aSourceFile;\n    // If aSourceFile is omitted, we will use the file property of the SourceMap\n    if (aSourceFile == null) {\n      if (aSourceMapConsumer.file == null) {\n        throw new Error(\n          'SourceMapGenerator.prototype.applySourceMap requires either an explicit source file, ' +\n          'or the source map\\'s \"file\" property. Both were omitted.'\n        );\n      }\n      sourceFile = aSourceMapConsumer.file;\n    }\n    var sourceRoot = this._sourceRoot;\n    // Make \"sourceFile\" relative if an absolute Url is passed.\n    if (sourceRoot != null) {\n      sourceFile = util.relative(sourceRoot, sourceFile);\n    }\n    // Applying the SourceMap can add and remove items from the sources and\n    // the names array.\n    var newSources = new ArraySet();\n    var newNames = new ArraySet();\n\n    // Find mappings for the \"sourceFile\"\n    this._mappings.unsortedForEach(function (mapping) {\n      if (mapping.source === sourceFile && mapping.originalLine != null) {\n        // Check if it can be mapped by the source map, then update the mapping.\n        var original = aSourceMapConsumer.originalPositionFor({\n          line: mapping.originalLine,\n          column: mapping.originalColumn\n        });\n        if (original.source != null) {\n          // Copy mapping\n          mapping.source = original.source;\n          if (aSourceMapPath != null) {\n            mapping.source = util.join(aSourceMapPath, mapping.source)\n          }\n          if (sourceRoot != null) {\n            mapping.source = util.relative(sourceRoot, mapping.source);\n          }\n          mapping.originalLine = original.line;\n          mapping.originalColumn = original.column;\n          if (original.name != null) {\n            mapping.name = original.name;\n          }\n        }\n      }\n\n      var source = mapping.source;\n      if (source != null && !newSources.has(source)) {\n        newSources.add(source);\n      }\n\n      var name = mapping.name;\n      if (name != null && !newNames.has(name)) {\n        newNames.add(name);\n      }\n\n    }, this);\n    this._sources = newSources;\n    this._names = newNames;\n\n    // Copy sourcesContents of applied map.\n    aSourceMapConsumer.sources.forEach(function (sourceFile) {\n      var content = aSourceMapConsumer.sourceContentFor(sourceFile);\n      if (content != null) {\n        if (aSourceMapPath != null) {\n          sourceFile = util.join(aSourceMapPath, sourceFile);\n        }\n        if (sourceRoot != null) {\n          sourceFile = util.relative(sourceRoot, sourceFile);\n        }\n        this.setSourceContent(sourceFile, content);\n      }\n    }, this);\n  };\n\n/**\n * A mapping can have one of the three levels of data:\n *\n *   1. Just the generated position.\n *   2. The Generated position, original position, and original source.\n *   3. Generated and original position, original source, as well as a name\n *      token.\n *\n * To maintain consistency, we validate that any new mapping being added falls\n * in to one of these categories.\n */\nSourceMapGenerator.prototype._validateMapping =\n  function SourceMapGenerator_validateMapping(aGenerated, aOriginal, aSource,\n                                              aName) {\n    // When aOriginal is truthy but has empty values for .line and .column,\n    // it is most likely a programmer error. In this case we throw a very\n    // specific error message to try to guide them the right way.\n    // For example: https://github.com/Polymer/polymer-bundler/pull/519\n    if (aOriginal && typeof aOriginal.line !== 'number' && typeof aOriginal.column !== 'number') {\n        throw new Error(\n            'original.line and original.column are not numbers -- you probably meant to omit ' +\n            'the original mapping entirely and only map the generated position. If so, pass ' +\n            'null for the original mapping instead of an object with empty or null values.'\n        );\n    }\n\n    if (aGenerated && 'line' in aGenerated && 'column' in aGenerated\n        && aGenerated.line > 0 && aGenerated.column >= 0\n        && !aOriginal && !aSource && !aName) {\n      // Case 1.\n      return;\n    }\n    else if (aGenerated && 'line' in aGenerated && 'column' in aGenerated\n             && aOriginal && 'line' in aOriginal && 'column' in aOriginal\n             && aGenerated.line > 0 && aGenerated.column >= 0\n             && aOriginal.line > 0 && aOriginal.column >= 0\n             && aSource) {\n      // Cases 2 and 3.\n      return;\n    }\n    else {\n      throw new Error('Invalid mapping: ' + JSON.stringify({\n        generated: aGenerated,\n        source: aSource,\n        original: aOriginal,\n        name: aName\n      }));\n    }\n  };\n\n/**\n * Serialize the accumulated mappings in to the stream of base 64 VLQs\n * specified by the source map format.\n */\nSourceMapGenerator.prototype._serializeMappings =\n  function SourceMapGenerator_serializeMappings() {\n    var previousGeneratedColumn = 0;\n    var previousGeneratedLine = 1;\n    var previousOriginalColumn = 0;\n    var previousOriginalLine = 0;\n    var previousName = 0;\n    var previousSource = 0;\n    var result = '';\n    var next;\n    var mapping;\n    var nameIdx;\n    var sourceIdx;\n\n    var mappings = this._mappings.toArray();\n    for (var i = 0, len = mappings.length; i < len; i++) {\n      mapping = mappings[i];\n      next = ''\n\n      if (mapping.generatedLine !== previousGeneratedLine) {\n        previousGeneratedColumn = 0;\n        while (mapping.generatedLine !== previousGeneratedLine) {\n          next += ';';\n          previousGeneratedLine++;\n        }\n      }\n      else {\n        if (i > 0) {\n          if (!util.compareByGeneratedPositionsInflated(mapping, mappings[i - 1])) {\n            continue;\n          }\n          next += ',';\n        }\n      }\n\n      next += base64VLQ.encode(mapping.generatedColumn\n                                 - previousGeneratedColumn);\n      previousGeneratedColumn = mapping.generatedColumn;\n\n      if (mapping.source != null) {\n        sourceIdx = this._sources.indexOf(mapping.source);\n        next += base64VLQ.encode(sourceIdx - previousSource);\n        previousSource = sourceIdx;\n\n        // lines are stored 0-based in SourceMap spec version 3\n        next += base64VLQ.encode(mapping.originalLine - 1\n                                   - previousOriginalLine);\n        previousOriginalLine = mapping.originalLine - 1;\n\n        next += base64VLQ.encode(mapping.originalColumn\n                                   - previousOriginalColumn);\n        previousOriginalColumn = mapping.originalColumn;\n\n        if (mapping.name != null) {\n          nameIdx = this._names.indexOf(mapping.name);\n          next += base64VLQ.encode(nameIdx - previousName);\n          previousName = nameIdx;\n        }\n      }\n\n      result += next;\n    }\n\n    return result;\n  };\n\nSourceMapGenerator.prototype._generateSourcesContent =\n  function SourceMapGenerator_generateSourcesContent(aSources, aSourceRoot) {\n    return aSources.map(function (source) {\n      if (!this._sourcesContents) {\n        return null;\n      }\n      if (aSourceRoot != null) {\n        source = util.relative(aSourceRoot, source);\n      }\n      var key = util.toSetString(source);\n      return Object.prototype.hasOwnProperty.call(this._sourcesContents, key)\n        ? this._sourcesContents[key]\n        : null;\n    }, this);\n  };\n\n/**\n * Externalize the source map.\n */\nSourceMapGenerator.prototype.toJSON =\n  function SourceMapGenerator_toJSON() {\n    var map = {\n      version: this._version,\n      sources: this._sources.toArray(),\n      names: this._names.toArray(),\n      mappings: this._serializeMappings()\n    };\n    if (this._file != null) {\n      map.file = this._file;\n    }\n    if (this._sourceRoot != null) {\n      map.sourceRoot = this._sourceRoot;\n    }\n    if (this._sourcesContents) {\n      map.sourcesContent = this._generateSourcesContent(map.sources, map.sourceRoot);\n    }\n\n    return map;\n  };\n\n/**\n * Render the source map being generated to a string.\n */\nSourceMapGenerator.prototype.toString =\n  function SourceMapGenerator_toString() {\n    return JSON.stringify(this.toJSON());\n  };\n\nexports.SourceMapGenerator = SourceMapGenerator;\n","/* -*- Mode: js; js-indent-level: 2; -*- */\n/*\n * Copyright 2011 Mozilla Foundation and contributors\n * Licensed under the New BSD license. See LICENSE or:\n * http://opensource.org/licenses/BSD-3-Clause\n *\n * Based on the Base 64 VLQ implementation in Closure Compiler:\n * https://code.google.com/p/closure-compiler/source/browse/trunk/src/com/google/debugging/sourcemap/Base64VLQ.java\n *\n * Copyright 2011 The Closure Compiler Authors. All rights reserved.\n * Redistribution and use in source and binary forms, with or without\n * modification, are permitted provided that the following conditions are\n * met:\n *\n *  * Redistributions of source code must retain the above copyright\n *    notice, this list of conditions and the following disclaimer.\n *  * Redistributions in binary form must reproduce the above\n *    copyright notice, this list of conditions and the following\n *    disclaimer in the documentation and/or other materials provided\n *    with the distribution.\n *  * Neither the name of Google Inc. nor the names of its\n *    contributors may be used to endorse or promote products derived\n *    from this software without specific prior written permission.\n *\n * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS\n * \"AS IS\" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT\n * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR\n * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT\n * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,\n * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\n * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,\n * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY\n * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT\n * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE\n * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\n */\n\nvar base64 = require('./base64');\n\n// A single base 64 digit can contain 6 bits of data. For the base 64 variable\n// length quantities we use in the source map spec, the first bit is the sign,\n// the next four bits are the actual value, and the 6th bit is the\n// continuation bit. The continuation bit tells us whether there are more\n// digits in this value following this digit.\n//\n//   Continuation\n//   |    Sign\n//   |    |\n//   V    V\n//   101011\n\nvar VLQ_BASE_SHIFT = 5;\n\n// binary: 100000\nvar VLQ_BASE = 1 << VLQ_BASE_SHIFT;\n\n// binary: 011111\nvar VLQ_BASE_MASK = VLQ_BASE - 1;\n\n// binary: 100000\nvar VLQ_CONTINUATION_BIT = VLQ_BASE;\n\n/**\n * Converts from a two-complement value to a value where the sign bit is\n * placed in the least significant bit.  For example, as decimals:\n *   1 becomes 2 (10 binary), -1 becomes 3 (11 binary)\n *   2 becomes 4 (100 binary), -2 becomes 5 (101 binary)\n */\nfunction toVLQSigned(aValue) {\n  return aValue < 0\n    ? ((-aValue) << 1) + 1\n    : (aValue << 1) + 0;\n}\n\n/**\n * Converts to a two-complement value from a value where the sign bit is\n * placed in the least significant bit.  For example, as decimals:\n *   2 (10 binary) becomes 1, 3 (11 binary) becomes -1\n *   4 (100 binary) becomes 2, 5 (101 binary) becomes -2\n */\nfunction fromVLQSigned(aValue) {\n  var isNegative = (aValue & 1) === 1;\n  var shifted = aValue >> 1;\n  return isNegative\n    ? -shifted\n    : shifted;\n}\n\n/**\n * Returns the base 64 VLQ encoded value.\n */\nexports.encode = function base64VLQ_encode(aValue) {\n  var encoded = \"\";\n  var digit;\n\n  var vlq = toVLQSigned(aValue);\n\n  do {\n    digit = vlq & VLQ_BASE_MASK;\n    vlq >>>= VLQ_BASE_SHIFT;\n    if (vlq > 0) {\n      // There are still more digits in this value, so we must make sure the\n      // continuation bit is marked.\n      digit |= VLQ_CONTINUATION_BIT;\n    }\n    encoded += base64.encode(digit);\n  } while (vlq > 0);\n\n  return encoded;\n};\n\n/**\n * Decodes the next base 64 VLQ value from the given string and returns the\n * value and the rest of the string via the out parameter.\n */\nexports.decode = function base64VLQ_decode(aStr, aIndex, aOutParam) {\n  var strLen = aStr.length;\n  var result = 0;\n  var shift = 0;\n  var continuation, digit;\n\n  do {\n    if (aIndex >= strLen) {\n      throw new Error(\"Expected more digits in base 64 VLQ value.\");\n    }\n\n    digit = base64.decode(aStr.charCodeAt(aIndex++));\n    if (digit === -1) {\n      throw new Error(\"Invalid base64 digit: \" + aStr.charAt(aIndex - 1));\n    }\n\n    continuation = !!(digit & VLQ_CONTINUATION_BIT);\n    digit &= VLQ_BASE_MASK;\n    result = result + (digit << shift);\n    shift += VLQ_BASE_SHIFT;\n  } while (continuation);\n\n  aOutParam.value = fromVLQSigned(result);\n  aOutParam.rest = aIndex;\n};\n","/* -*- Mode: js; js-indent-level: 2; -*- */\n/*\n * Copyright 2011 Mozilla Foundation and contributors\n * Licensed under the New BSD license. See LICENSE or:\n * http://opensource.org/licenses/BSD-3-Clause\n */\n\n// It turns out that some (most?) JavaScript engines don't self-host\n// `Array.prototype.sort`. This makes sense because C++ will likely remain\n// faster than JS when doing raw CPU-intensive sorting. However, when using a\n// custom comparator function, calling back and forth between the VM's C++ and\n// JIT'd JS is rather slow *and* loses JIT type information, resulting in\n// worse generated code for the comparator function than would be optimal. In\n// fact, when sorting with a comparator, these costs outweigh the benefits of\n// sorting in C++. By using our own JS-implemented Quick Sort (below), we get\n// a ~3500ms mean speed-up in `bench/bench.html`.\n\n/**\n * Swap the elements indexed by `x` and `y` in the array `ary`.\n *\n * @param {Array} ary\n *        The array.\n * @param {Number} x\n *        The index of the first item.\n * @param {Number} y\n *        The index of the second item.\n */\nfunction swap(ary, x, y) {\n  var temp = ary[x];\n  ary[x] = ary[y];\n  ary[y] = temp;\n}\n\n/**\n * Returns a random integer within the range `low .. high` inclusive.\n *\n * @param {Number} low\n *        The lower bound on the range.\n * @param {Number} high\n *        The upper bound on the range.\n */\nfunction randomIntInRange(low, high) {\n  return Math.round(low + (Math.random() * (high - low)));\n}\n\n/**\n * The Quick Sort algorithm.\n *\n * @param {Array} ary\n *        An array to sort.\n * @param {function} comparator\n *        Function to use to compare two items.\n * @param {Number} p\n *        Start index of the array\n * @param {Number} r\n *        End index of the array\n */\nfunction doQuickSort(ary, comparator, p, r) {\n  // If our lower bound is less than our upper bound, we (1) partition the\n  // array into two pieces and (2) recurse on each half. If it is not, this is\n  // the empty array and our base case.\n\n  if (p < r) {\n    // (1) Partitioning.\n    //\n    // The partitioning chooses a pivot between `p` and `r` and moves all\n    // elements that are less than or equal to the pivot to the before it, and\n    // all the elements that are greater than it after it. The effect is that\n    // once partition is done, the pivot is in the exact place it will be when\n    // the array is put in sorted order, and it will not need to be moved\n    // again. This runs in O(n) time.\n\n    // Always choose a random pivot so that an input array which is reverse\n    // sorted does not cause O(n^2) running time.\n    var pivotIndex = randomIntInRange(p, r);\n    var i = p - 1;\n\n    swap(ary, pivotIndex, r);\n    var pivot = ary[r];\n\n    // Immediately after `j` is incremented in this loop, the following hold\n    // true:\n    //\n    //   * Every element in `ary[p .. i]` is less than or equal to the pivot.\n    //\n    //   * Every element in `ary[i+1 .. j-1]` is greater than the pivot.\n    for (var j = p; j < r; j++) {\n      if (comparator(ary[j], pivot) <= 0) {\n        i += 1;\n        swap(ary, i, j);\n      }\n    }\n\n    swap(ary, i + 1, j);\n    var q = i + 1;\n\n    // (2) Recurse on each half.\n\n    doQuickSort(ary, comparator, p, q - 1);\n    doQuickSort(ary, comparator, q + 1, r);\n  }\n}\n\n/**\n * Sort the given array in-place with the given comparator function.\n *\n * @param {Array} ary\n *        An array to sort.\n * @param {function} comparator\n *        Function to use to compare two items.\n */\nexports.quickSort = function (ary, comparator) {\n  doQuickSort(ary, comparator, 0, ary.length - 1);\n};\n","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n'use strict';\n\n// If obj.hasOwnProperty has been overridden, then calling\n// obj.hasOwnProperty(prop) will break.\n// See: https://github.com/joyent/node/issues/1707\nfunction hasOwnProperty(obj, prop) {\n  return Object.prototype.hasOwnProperty.call(obj, prop);\n}\n\nmodule.exports = function(qs, sep, eq, options) {\n  sep = sep || '&';\n  eq = eq || '=';\n  var obj = {};\n\n  if (typeof qs !== 'string' || qs.length === 0) {\n    return obj;\n  }\n\n  var regexp = /\\+/g;\n  qs = qs.split(sep);\n\n  var maxKeys = 1000;\n  if (options && typeof options.maxKeys === 'number') {\n    maxKeys = options.maxKeys;\n  }\n\n  var len = qs.length;\n  // maxKeys <= 0 means that we should not limit keys count\n  if (maxKeys > 0 && len > maxKeys) {\n    len = maxKeys;\n  }\n\n  for (var i = 0; i < len; ++i) {\n    var x = qs[i].replace(regexp, '%20'),\n        idx = x.indexOf(eq),\n        kstr, vstr, k, v;\n\n    if (idx >= 0) {\n      kstr = x.substr(0, idx);\n      vstr = x.substr(idx + 1);\n    } else {\n      kstr = x;\n      vstr = '';\n    }\n\n    k = decodeURIComponent(kstr);\n    v = decodeURIComponent(vstr);\n\n    if (!hasOwnProperty(obj, k)) {\n      obj[k] = v;\n    } else if (isArray(obj[k])) {\n      obj[k].push(v);\n    } else {\n      obj[k] = [obj[k], v];\n    }\n  }\n\n  return obj;\n};\n\nvar isArray = Array.isArray || function (xs) {\n  return Object.prototype.toString.call(xs) === '[object Array]';\n};\n","/**\n * Copyright (c) 2014-present, Facebook, Inc.\n *\n * This source code is licensed under the MIT license found in the\n * LICENSE file in the root directory of this source tree.\n */\n\nvar runtime = (function (exports) {\n  \"use strict\";\n\n  var Op = Object.prototype;\n  var hasOwn = Op.hasOwnProperty;\n  var undefined; // More compressible than void 0.\n  var $Symbol = typeof Symbol === \"function\" ? Symbol : {};\n  var iteratorSymbol = $Symbol.iterator || \"@@iterator\";\n  var asyncIteratorSymbol = $Symbol.asyncIterator || \"@@asyncIterator\";\n  var toStringTagSymbol = $Symbol.toStringTag || \"@@toStringTag\";\n\n  function wrap(innerFn, outerFn, self, tryLocsList) {\n    // If outerFn provided and outerFn.prototype is a Generator, then outerFn.prototype instanceof Generator.\n    var protoGenerator = outerFn && outerFn.prototype instanceof Generator ? outerFn : Generator;\n    var generator = Object.create(protoGenerator.prototype);\n    var context = new Context(tryLocsList || []);\n\n    // The ._invoke method unifies the implementations of the .next,\n    // .throw, and .return methods.\n    generator._invoke = makeInvokeMethod(innerFn, self, context);\n\n    return generator;\n  }\n  exports.wrap = wrap;\n\n  // Try/catch helper to minimize deoptimizations. Returns a completion\n  // record like context.tryEntries[i].completion. This interface could\n  // have been (and was previously) designed to take a closure to be\n  // invoked without arguments, but in all the cases we care about we\n  // already have an existing method we want to call, so there's no need\n  // to create a new function object. We can even get away with assuming\n  // the method takes exactly one argument, since that happens to be true\n  // in every case, so we don't have to touch the arguments object. The\n  // only additional allocation required is the completion record, which\n  // has a stable shape and so hopefully should be cheap to allocate.\n  function tryCatch(fn, obj, arg) {\n    try {\n      return { type: \"normal\", arg: fn.call(obj, arg) };\n    } catch (err) {\n      return { type: \"throw\", arg: err };\n    }\n  }\n\n  var GenStateSuspendedStart = \"suspendedStart\";\n  var GenStateSuspendedYield = \"suspendedYield\";\n  var GenStateExecuting = \"executing\";\n  var GenStateCompleted = \"completed\";\n\n  // Returning this object from the innerFn has the same effect as\n  // breaking out of the dispatch switch statement.\n  var ContinueSentinel = {};\n\n  // Dummy constructor functions that we use as the .constructor and\n  // .constructor.prototype properties for functions that return Generator\n  // objects. For full spec compliance, you may wish to configure your\n  // minifier not to mangle the names of these two functions.\n  function Generator() {}\n  function GeneratorFunction() {}\n  function GeneratorFunctionPrototype() {}\n\n  // This is a polyfill for %IteratorPrototype% for environments that\n  // don't natively support it.\n  var IteratorPrototype = {};\n  IteratorPrototype[iteratorSymbol] = function () {\n    return this;\n  };\n\n  var getProto = Object.getPrototypeOf;\n  var NativeIteratorPrototype = getProto && getProto(getProto(values([])));\n  if (NativeIteratorPrototype &&\n      NativeIteratorPrototype !== Op &&\n      hasOwn.call(NativeIteratorPrototype, iteratorSymbol)) {\n    // This environment has a native %IteratorPrototype%; use it instead\n    // of the polyfill.\n    IteratorPrototype = NativeIteratorPrototype;\n  }\n\n  var Gp = GeneratorFunctionPrototype.prototype =\n    Generator.prototype = Object.create(IteratorPrototype);\n  GeneratorFunction.prototype = Gp.constructor = GeneratorFunctionPrototype;\n  GeneratorFunctionPrototype.constructor = GeneratorFunction;\n  GeneratorFunctionPrototype[toStringTagSymbol] =\n    GeneratorFunction.displayName = \"GeneratorFunction\";\n\n  // Helper for defining the .next, .throw, and .return methods of the\n  // Iterator interface in terms of a single ._invoke method.\n  function defineIteratorMethods(prototype) {\n    [\"next\", \"throw\", \"return\"].forEach(function(method) {\n      prototype[method] = function(arg) {\n        return this._invoke(method, arg);\n      };\n    });\n  }\n\n  exports.isGeneratorFunction = function(genFun) {\n    var ctor = typeof genFun === \"function\" && genFun.constructor;\n    return ctor\n      ? ctor === GeneratorFunction ||\n        // For the native GeneratorFunction constructor, the best we can\n        // do is to check its .name property.\n        (ctor.displayName || ctor.name) === \"GeneratorFunction\"\n      : false;\n  };\n\n  exports.mark = function(genFun) {\n    if (Object.setPrototypeOf) {\n      Object.setPrototypeOf(genFun, GeneratorFunctionPrototype);\n    } else {\n      genFun.__proto__ = GeneratorFunctionPrototype;\n      if (!(toStringTagSymbol in genFun)) {\n        genFun[toStringTagSymbol] = \"GeneratorFunction\";\n      }\n    }\n    genFun.prototype = Object.create(Gp);\n    return genFun;\n  };\n\n  // Within the body of any async function, `await x` is transformed to\n  // `yield regeneratorRuntime.awrap(x)`, so that the runtime can test\n  // `hasOwn.call(value, \"__await\")` to determine if the yielded value is\n  // meant to be awaited.\n  exports.awrap = function(arg) {\n    return { __await: arg };\n  };\n\n  function AsyncIterator(generator) {\n    function invoke(method, arg, resolve, reject) {\n      var record = tryCatch(generator[method], generator, arg);\n      if (record.type === \"throw\") {\n        reject(record.arg);\n      } else {\n        var result = record.arg;\n        var value = result.value;\n        if (value &&\n            typeof value === \"object\" &&\n            hasOwn.call(value, \"__await\")) {\n          return Promise.resolve(value.__await).then(function(value) {\n            invoke(\"next\", value, resolve, reject);\n          }, function(err) {\n            invoke(\"throw\", err, resolve, reject);\n          });\n        }\n\n        return Promise.resolve(value).then(function(unwrapped) {\n          // When a yielded Promise is resolved, its final value becomes\n          // the .value of the Promise<{value,done}> result for the\n          // current iteration.\n          result.value = unwrapped;\n          resolve(result);\n        }, function(error) {\n          // If a rejected Promise was yielded, throw the rejection back\n          // into the async generator function so it can be handled there.\n          return invoke(\"throw\", error, resolve, reject);\n        });\n      }\n    }\n\n    var previousPromise;\n\n    function enqueue(method, arg) {\n      function callInvokeWithMethodAndArg() {\n        return new Promise(function(resolve, reject) {\n          invoke(method, arg, resolve, reject);\n        });\n      }\n\n      return previousPromise =\n        // If enqueue has been called before, then we want to wait until\n        // all previous Promises have been resolved before calling invoke,\n        // so that results are always delivered in the correct order. If\n        // enqueue has not been called before, then it is important to\n        // call invoke immediately, without waiting on a callback to fire,\n        // so that the async generator function has the opportunity to do\n        // any necessary setup in a predictable way. This predictability\n        // is why the Promise constructor synchronously invokes its\n        // executor callback, and why async functions synchronously\n        // execute code before the first await. Since we implement simple\n        // async functions in terms of async generators, it is especially\n        // important to get this right, even though it requires care.\n        previousPromise ? previousPromise.then(\n          callInvokeWithMethodAndArg,\n          // Avoid propagating failures to Promises returned by later\n          // invocations of the iterator.\n          callInvokeWithMethodAndArg\n        ) : callInvokeWithMethodAndArg();\n    }\n\n    // Define the unified helper method that is used to implement .next,\n    // .throw, and .return (see defineIteratorMethods).\n    this._invoke = enqueue;\n  }\n\n  defineIteratorMethods(AsyncIterator.prototype);\n  AsyncIterator.prototype[asyncIteratorSymbol] = function () {\n    return this;\n  };\n  exports.AsyncIterator = AsyncIterator;\n\n  // Note that simple async functions are implemented on top of\n  // AsyncIterator objects; they just return a Promise for the value of\n  // the final result produced by the iterator.\n  exports.async = function(innerFn, outerFn, self, tryLocsList) {\n    var iter = new AsyncIterator(\n      wrap(innerFn, outerFn, self, tryLocsList)\n    );\n\n    return exports.isGeneratorFunction(outerFn)\n      ? iter // If outerFn is a generator, return the full iterator.\n      : iter.next().then(function(result) {\n          return result.done ? result.value : iter.next();\n        });\n  };\n\n  function makeInvokeMethod(innerFn, self, context) {\n    var state = GenStateSuspendedStart;\n\n    return function invoke(method, arg) {\n      if (state === GenStateExecuting) {\n        throw new Error(\"Generator is already running\");\n      }\n\n      if (state === GenStateCompleted) {\n        if (method === \"throw\") {\n          throw arg;\n        }\n\n        // Be forgiving, per 25.3.3.3.3 of the spec:\n        // https://people.mozilla.org/~jorendorff/es6-draft.html#sec-generatorresume\n        return doneResult();\n      }\n\n      context.method = method;\n      context.arg = arg;\n\n      while (true) {\n        var delegate = context.delegate;\n        if (delegate) {\n          var delegateResult = maybeInvokeDelegate(delegate, context);\n          if (delegateResult) {\n            if (delegateResult === ContinueSentinel) continue;\n            return delegateResult;\n          }\n        }\n\n        if (context.method === \"next\") {\n          // Setting context._sent for legacy support of Babel's\n          // function.sent implementation.\n          context.sent = context._sent = context.arg;\n\n        } else if (context.method === \"throw\") {\n          if (state === GenStateSuspendedStart) {\n            state = GenStateCompleted;\n            throw context.arg;\n          }\n\n          context.dispatchException(context.arg);\n\n        } else if (context.method === \"return\") {\n          context.abrupt(\"return\", context.arg);\n        }\n\n        state = GenStateExecuting;\n\n        var record = tryCatch(innerFn, self, context);\n        if (record.type === \"normal\") {\n          // If an exception is thrown from innerFn, we leave state ===\n          // GenStateExecuting and loop back for another invocation.\n          state = context.done\n            ? GenStateCompleted\n            : GenStateSuspendedYield;\n\n          if (record.arg === ContinueSentinel) {\n            continue;\n          }\n\n          return {\n            value: record.arg,\n            done: context.done\n          };\n\n        } else if (record.type === \"throw\") {\n          state = GenStateCompleted;\n          // Dispatch the exception by looping back around to the\n          // context.dispatchException(context.arg) call above.\n          context.method = \"throw\";\n          context.arg = record.arg;\n        }\n      }\n    };\n  }\n\n  // Call delegate.iterator[context.method](context.arg) and handle the\n  // result, either by returning a { value, done } result from the\n  // delegate iterator, or by modifying context.method and context.arg,\n  // setting context.delegate to null, and returning the ContinueSentinel.\n  function maybeInvokeDelegate(delegate, context) {\n    var method = delegate.iterator[context.method];\n    if (method === undefined) {\n      // A .throw or .return when the delegate iterator has no .throw\n      // method always terminates the yield* loop.\n      context.delegate = null;\n\n      if (context.method === \"throw\") {\n        // Note: [\"return\"] must be used for ES3 parsing compatibility.\n        if (delegate.iterator[\"return\"]) {\n          // If the delegate iterator has a return method, give it a\n          // chance to clean up.\n          context.method = \"return\";\n          context.arg = undefined;\n          maybeInvokeDelegate(delegate, context);\n\n          if (context.method === \"throw\") {\n            // If maybeInvokeDelegate(context) changed context.method from\n            // \"return\" to \"throw\", let that override the TypeError below.\n            return ContinueSentinel;\n          }\n        }\n\n        context.method = \"throw\";\n        context.arg = new TypeError(\n          \"The iterator does not provide a 'throw' method\");\n      }\n\n      return ContinueSentinel;\n    }\n\n    var record = tryCatch(method, delegate.iterator, context.arg);\n\n    if (record.type === \"throw\") {\n      context.method = \"throw\";\n      context.arg = record.arg;\n      context.delegate = null;\n      return ContinueSentinel;\n    }\n\n    var info = record.arg;\n\n    if (! info) {\n      context.method = \"throw\";\n      context.arg = new TypeError(\"iterator result is not an object\");\n      context.delegate = null;\n      return ContinueSentinel;\n    }\n\n    if (info.done) {\n      // Assign the result of the finished delegate to the temporary\n      // variable specified by delegate.resultName (see delegateYield).\n      context[delegate.resultName] = info.value;\n\n      // Resume execution at the desired location (see delegateYield).\n      context.next = delegate.nextLoc;\n\n      // If context.method was \"throw\" but the delegate handled the\n      // exception, let the outer generator proceed normally. If\n      // context.method was \"next\", forget context.arg since it has been\n      // \"consumed\" by the delegate iterator. If context.method was\n      // \"return\", allow the original .return call to continue in the\n      // outer generator.\n      if (context.method !== \"return\") {\n        context.method = \"next\";\n        context.arg = undefined;\n      }\n\n    } else {\n      // Re-yield the result returned by the delegate method.\n      return info;\n    }\n\n    // The delegate iterator is finished, so forget it and continue with\n    // the outer generator.\n    context.delegate = null;\n    return ContinueSentinel;\n  }\n\n  // Define Generator.prototype.{next,throw,return} in terms of the\n  // unified ._invoke helper method.\n  defineIteratorMethods(Gp);\n\n  Gp[toStringTagSymbol] = \"Generator\";\n\n  // A Generator should always return itself as the iterator object when the\n  // @@iterator function is called on it. Some browsers' implementations of the\n  // iterator prototype chain incorrectly implement this, causing the Generator\n  // object to not be returned from this call. This ensures that doesn't happen.\n  // See https://github.com/facebook/regenerator/issues/274 for more details.\n  Gp[iteratorSymbol] = function() {\n    return this;\n  };\n\n  Gp.toString = function() {\n    return \"[object Generator]\";\n  };\n\n  function pushTryEntry(locs) {\n    var entry = { tryLoc: locs[0] };\n\n    if (1 in locs) {\n      entry.catchLoc = locs[1];\n    }\n\n    if (2 in locs) {\n      entry.finallyLoc = locs[2];\n      entry.afterLoc = locs[3];\n    }\n\n    this.tryEntries.push(entry);\n  }\n\n  function resetTryEntry(entry) {\n    var record = entry.completion || {};\n    record.type = \"normal\";\n    delete record.arg;\n    entry.completion = record;\n  }\n\n  function Context(tryLocsList) {\n    // The root entry object (effectively a try statement without a catch\n    // or a finally block) gives us a place to store values thrown from\n    // locations where there is no enclosing try statement.\n    this.tryEntries = [{ tryLoc: \"root\" }];\n    tryLocsList.forEach(pushTryEntry, this);\n    this.reset(true);\n  }\n\n  exports.keys = function(object) {\n    var keys = [];\n    for (var key in object) {\n      keys.push(key);\n    }\n    keys.reverse();\n\n    // Rather than returning an object with a next method, we keep\n    // things simple and return the next function itself.\n    return function next() {\n      while (keys.length) {\n        var key = keys.pop();\n        if (key in object) {\n          next.value = key;\n          next.done = false;\n          return next;\n        }\n      }\n\n      // To avoid creating an additional object, we just hang the .value\n      // and .done properties off the next function object itself. This\n      // also ensures that the minifier will not anonymize the function.\n      next.done = true;\n      return next;\n    };\n  };\n\n  function values(iterable) {\n    if (iterable) {\n      var iteratorMethod = iterable[iteratorSymbol];\n      if (iteratorMethod) {\n        return iteratorMethod.call(iterable);\n      }\n\n      if (typeof iterable.next === \"function\") {\n        return iterable;\n      }\n\n      if (!isNaN(iterable.length)) {\n        var i = -1, next = function next() {\n          while (++i < iterable.length) {\n            if (hasOwn.call(iterable, i)) {\n              next.value = iterable[i];\n              next.done = false;\n              return next;\n            }\n          }\n\n          next.value = undefined;\n          next.done = true;\n\n          return next;\n        };\n\n        return next.next = next;\n      }\n    }\n\n    // Return an iterator with no values.\n    return { next: doneResult };\n  }\n  exports.values = values;\n\n  function doneResult() {\n    return { value: undefined, done: true };\n  }\n\n  Context.prototype = {\n    constructor: Context,\n\n    reset: function(skipTempReset) {\n      this.prev = 0;\n      this.next = 0;\n      // Resetting context._sent for legacy support of Babel's\n      // function.sent implementation.\n      this.sent = this._sent = undefined;\n      this.done = false;\n      this.delegate = null;\n\n      this.method = \"next\";\n      this.arg = undefined;\n\n      this.tryEntries.forEach(resetTryEntry);\n\n      if (!skipTempReset) {\n        for (var name in this) {\n          // Not sure about the optimal order of these conditions:\n          if (name.charAt(0) === \"t\" &&\n              hasOwn.call(this, name) &&\n              !isNaN(+name.slice(1))) {\n            this[name] = undefined;\n          }\n        }\n      }\n    },\n\n    stop: function() {\n      this.done = true;\n\n      var rootEntry = this.tryEntries[0];\n      var rootRecord = rootEntry.completion;\n      if (rootRecord.type === \"throw\") {\n        throw rootRecord.arg;\n      }\n\n      return this.rval;\n    },\n\n    dispatchException: function(exception) {\n      if (this.done) {\n        throw exception;\n      }\n\n      var context = this;\n      function handle(loc, caught) {\n        record.type = \"throw\";\n        record.arg = exception;\n        context.next = loc;\n\n        if (caught) {\n          // If the dispatched exception was caught by a catch block,\n          // then let that catch block handle the exception normally.\n          context.method = \"next\";\n          context.arg = undefined;\n        }\n\n        return !! caught;\n      }\n\n      for (var i = this.tryEntries.length - 1; i >= 0; --i) {\n        var entry = this.tryEntries[i];\n        var record = entry.completion;\n\n        if (entry.tryLoc === \"root\") {\n          // Exception thrown outside of any try block that could handle\n          // it, so set the completion value of the entire function to\n          // throw the exception.\n          return handle(\"end\");\n        }\n\n        if (entry.tryLoc <= this.prev) {\n          var hasCatch = hasOwn.call(entry, \"catchLoc\");\n          var hasFinally = hasOwn.call(entry, \"finallyLoc\");\n\n          if (hasCatch && hasFinally) {\n            if (this.prev < entry.catchLoc) {\n              return handle(entry.catchLoc, true);\n            } else if (this.prev < entry.finallyLoc) {\n              return handle(entry.finallyLoc);\n            }\n\n          } else if (hasCatch) {\n            if (this.prev < entry.catchLoc) {\n              return handle(entry.catchLoc, true);\n            }\n\n          } else if (hasFinally) {\n            if (this.prev < entry.finallyLoc) {\n              return handle(entry.finallyLoc);\n            }\n\n          } else {\n            throw new Error(\"try statement without catch or finally\");\n          }\n        }\n      }\n    },\n\n    abrupt: function(type, arg) {\n      for (var i = this.tryEntries.length - 1; i >= 0; --i) {\n        var entry = this.tryEntries[i];\n        if (entry.tryLoc <= this.prev &&\n            hasOwn.call(entry, \"finallyLoc\") &&\n            this.prev < entry.finallyLoc) {\n          var finallyEntry = entry;\n          break;\n        }\n      }\n\n      if (finallyEntry &&\n          (type === \"break\" ||\n           type === \"continue\") &&\n          finallyEntry.tryLoc <= arg &&\n          arg <= finallyEntry.finallyLoc) {\n        // Ignore the finally entry if control is not jumping to a\n        // location outside the try/catch block.\n        finallyEntry = null;\n      }\n\n      var record = finallyEntry ? finallyEntry.completion : {};\n      record.type = type;\n      record.arg = arg;\n\n      if (finallyEntry) {\n        this.method = \"next\";\n        this.next = finallyEntry.finallyLoc;\n        return ContinueSentinel;\n      }\n\n      return this.complete(record);\n    },\n\n    complete: function(record, afterLoc) {\n      if (record.type === \"throw\") {\n        throw record.arg;\n      }\n\n      if (record.type === \"break\" ||\n          record.type === \"continue\") {\n        this.next = record.arg;\n      } else if (record.type === \"return\") {\n        this.rval = this.arg = record.arg;\n        this.method = \"return\";\n        this.next = \"end\";\n      } else if (record.type === \"normal\" && afterLoc) {\n        this.next = afterLoc;\n      }\n\n      return ContinueSentinel;\n    },\n\n    finish: function(finallyLoc) {\n      for (var i = this.tryEntries.length - 1; i >= 0; --i) {\n        var entry = this.tryEntries[i];\n        if (entry.finallyLoc === finallyLoc) {\n          this.complete(entry.completion, entry.afterLoc);\n          resetTryEntry(entry);\n          return ContinueSentinel;\n        }\n      }\n    },\n\n    \"catch\": function(tryLoc) {\n      for (var i = this.tryEntries.length - 1; i >= 0; --i) {\n        var entry = this.tryEntries[i];\n        if (entry.tryLoc === tryLoc) {\n          var record = entry.completion;\n          if (record.type === \"throw\") {\n            var thrown = record.arg;\n            resetTryEntry(entry);\n          }\n          return thrown;\n        }\n      }\n\n      // The context.catch method must only be called with a location\n      // argument that corresponds to a known catch block.\n      throw new Error(\"illegal catch attempt\");\n    },\n\n    delegateYield: function(iterable, resultName, nextLoc) {\n      this.delegate = {\n        iterator: values(iterable),\n        resultName: resultName,\n        nextLoc: nextLoc\n      };\n\n      if (this.method === \"next\") {\n        // Deliberately forget the last sent value so that we don't\n        // accidentally pass it on to the delegate.\n        this.arg = undefined;\n      }\n\n      return ContinueSentinel;\n    }\n  };\n\n  // Regardless of whether this script is executing as a CommonJS module\n  // or not, return the runtime object so that we can declare the variable\n  // regeneratorRuntime in the outer scope, which allows this module to be\n  // injected easily by `bin/regenerator --include-runtime script.js`.\n  return exports;\n\n}(\n  // If this script is executing as a CommonJS module, use module.exports\n  // as the regeneratorRuntime namespace. Otherwise create a new empty\n  // object. Either way, the resulting object will be used to initialize\n  // the regeneratorRuntime variable at the top of this file.\n  typeof module === \"object\" ? module.exports : {}\n));\n\ntry {\n  regeneratorRuntime = runtime;\n} catch (accidentalStrictMode) {\n  // This module should not be running in strict mode, so the above\n  // assignment should always work unless something is misconfigured. Just\n  // in case runtime.js accidentally runs in strict mode, we can escape\n  // strict mode using a global Function call. This could conceivably fail\n  // if a Content Security Policy forbids using Function, but in that case\n  // the proper solution is to fix the accidental strict mode problem. If\n  // you've misconfigured your bundler to force strict mode and applied a\n  // CSP to forbid Function, and you're not willing to fix either of those\n  // problems, please detail your unique predicament in a GitHub issue.\n  Function(\"r\", \"regeneratorRuntime = r\")(runtime);\n}\n","/* -*- Mode: js; js-indent-level: 2; -*- */\n/*\n * Copyright 2011 Mozilla Foundation and contributors\n * Licensed under the New BSD license. See LICENSE or:\n * http://opensource.org/licenses/BSD-3-Clause\n */\n\nexports.GREATEST_LOWER_BOUND = 1;\nexports.LEAST_UPPER_BOUND = 2;\n\n/**\n * Recursive implementation of binary search.\n *\n * @param aLow Indices here and lower do not contain the needle.\n * @param aHigh Indices here and higher do not contain the needle.\n * @param aNeedle The element being searched for.\n * @param aHaystack The non-empty array being searched.\n * @param aCompare Function which takes two elements and returns -1, 0, or 1.\n * @param aBias Either 'binarySearch.GREATEST_LOWER_BOUND' or\n *     'binarySearch.LEAST_UPPER_BOUND'. Specifies whether to return the\n *     closest element that is smaller than or greater than the one we are\n *     searching for, respectively, if the exact element cannot be found.\n */\nfunction recursiveSearch(aLow, aHigh, aNeedle, aHaystack, aCompare, aBias) {\n  // This function terminates when one of the following is true:\n  //\n  //   1. We find the exact element we are looking for.\n  //\n  //   2. We did not find the exact element, but we can return the index of\n  //      the next-closest element.\n  //\n  //   3. We did not find the exact element, and there is no next-closest\n  //      element than the one we are searching for, so we return -1.\n  var mid = Math.floor((aHigh - aLow) / 2) + aLow;\n  var cmp = aCompare(aNeedle, aHaystack[mid], true);\n  if (cmp === 0) {\n    // Found the element we are looking for.\n    return mid;\n  }\n  else if (cmp > 0) {\n    // Our needle is greater than aHaystack[mid].\n    if (aHigh - mid > 1) {\n      // The element is in the upper half.\n      return recursiveSearch(mid, aHigh, aNeedle, aHaystack, aCompare, aBias);\n    }\n\n    // The exact needle element was not found in this haystack. Determine if\n    // we are in termination case (3) or (2) and return the appropriate thing.\n    if (aBias == exports.LEAST_UPPER_BOUND) {\n      return aHigh < aHaystack.length ? aHigh : -1;\n    } else {\n      return mid;\n    }\n  }\n  else {\n    // Our needle is less than aHaystack[mid].\n    if (mid - aLow > 1) {\n      // The element is in the lower half.\n      return recursiveSearch(aLow, mid, aNeedle, aHaystack, aCompare, aBias);\n    }\n\n    // we are in termination case (3) or (2) and return the appropriate thing.\n    if (aBias == exports.LEAST_UPPER_BOUND) {\n      return mid;\n    } else {\n      return aLow < 0 ? -1 : aLow;\n    }\n  }\n}\n\n/**\n * This is an implementation of binary search which will always try and return\n * the index of the closest element if there is no exact hit. This is because\n * mappings between original and generated line/col pairs are single points,\n * and there is an implicit region between each of them, so a miss just means\n * that you aren't on the very start of a region.\n *\n * @param aNeedle The element you are looking for.\n * @param aHaystack The array that is being searched.\n * @param aCompare A function which takes the needle and an element in the\n *     array and returns -1, 0, or 1 depending on whether the needle is less\n *     than, equal to, or greater than the element, respectively.\n * @param aBias Either 'binarySearch.GREATEST_LOWER_BOUND' or\n *     'binarySearch.LEAST_UPPER_BOUND'. Specifies whether to return the\n *     closest element that is smaller than or greater than the one we are\n *     searching for, respectively, if the exact element cannot be found.\n *     Defaults to 'binarySearch.GREATEST_LOWER_BOUND'.\n */\nexports.search = function search(aNeedle, aHaystack, aCompare, aBias) {\n  if (aHaystack.length === 0) {\n    return -1;\n  }\n\n  var index = recursiveSearch(-1, aHaystack.length, aNeedle, aHaystack,\n                              aCompare, aBias || exports.GREATEST_LOWER_BOUND);\n  if (index < 0) {\n    return -1;\n  }\n\n  // We have found either the exact element, or the next-closest element than\n  // the one we are searching for. However, there may be more than one such\n  // element. Make sure we always return the smallest of these.\n  while (index - 1 >= 0) {\n    if (aCompare(aHaystack[index], aHaystack[index - 1], true) !== 0) {\n      break;\n    }\n    --index;\n  }\n\n  return index;\n};\n","/* -*- Mode: js; js-indent-level: 2; -*- */\n/*\n * Copyright 2011 Mozilla Foundation and contributors\n * Licensed under the New BSD license. See LICENSE or:\n * http://opensource.org/licenses/BSD-3-Clause\n */\n\nvar util = require('./util');\nvar binarySearch = require('./binary-search');\nvar ArraySet = require('./array-set').ArraySet;\nvar base64VLQ = require('./base64-vlq');\nvar quickSort = require('./quick-sort').quickSort;\n\nfunction SourceMapConsumer(aSourceMap, aSourceMapURL) {\n  var sourceMap = aSourceMap;\n  if (typeof aSourceMap === 'string') {\n    sourceMap = util.parseSourceMapInput(aSourceMap);\n  }\n\n  return sourceMap.sections != null\n    ? new IndexedSourceMapConsumer(sourceMap, aSourceMapURL)\n    : new BasicSourceMapConsumer(sourceMap, aSourceMapURL);\n}\n\nSourceMapConsumer.fromSourceMap = function(aSourceMap, aSourceMapURL) {\n  return BasicSourceMapConsumer.fromSourceMap(aSourceMap, aSourceMapURL);\n}\n\n/**\n * The version of the source mapping spec that we are consuming.\n */\nSourceMapConsumer.prototype._version = 3;\n\n// `__generatedMappings` and `__originalMappings` are arrays that hold the\n// parsed mapping coordinates from the source map's \"mappings\" attribute. They\n// are lazily instantiated, accessed via the `_generatedMappings` and\n// `_originalMappings` getters respectively, and we only parse the mappings\n// and create these arrays once queried for a source location. We jump through\n// these hoops because there can be many thousands of mappings, and parsing\n// them is expensive, so we only want to do it if we must.\n//\n// Each object in the arrays is of the form:\n//\n//     {\n//       generatedLine: The line number in the generated code,\n//       generatedColumn: The column number in the generated code,\n//       source: The path to the original source file that generated this\n//               chunk of code,\n//       originalLine: The line number in the original source that\n//                     corresponds to this chunk of generated code,\n//       originalColumn: The column number in the original source that\n//                       corresponds to this chunk of generated code,\n//       name: The name of the original symbol which generated this chunk of\n//             code.\n//     }\n//\n// All properties except for `generatedLine` and `generatedColumn` can be\n// `null`.\n//\n// `_generatedMappings` is ordered by the generated positions.\n//\n// `_originalMappings` is ordered by the original positions.\n\nSourceMapConsumer.prototype.__generatedMappings = null;\nObject.defineProperty(SourceMapConsumer.prototype, '_generatedMappings', {\n  configurable: true,\n  enumerable: true,\n  get: function () {\n    if (!this.__generatedMappings) {\n      this._parseMappings(this._mappings, this.sourceRoot);\n    }\n\n    return this.__generatedMappings;\n  }\n});\n\nSourceMapConsumer.prototype.__originalMappings = null;\nObject.defineProperty(SourceMapConsumer.prototype, '_originalMappings', {\n  configurable: true,\n  enumerable: true,\n  get: function () {\n    if (!this.__originalMappings) {\n      this._parseMappings(this._mappings, this.sourceRoot);\n    }\n\n    return this.__originalMappings;\n  }\n});\n\nSourceMapConsumer.prototype._charIsMappingSeparator =\n  function SourceMapConsumer_charIsMappingSeparator(aStr, index) {\n    var c = aStr.charAt(index);\n    return c === \";\" || c === \",\";\n  };\n\n/**\n * Parse the mappings in a string in to a data structure which we can easily\n * query (the ordered arrays in the `this.__generatedMappings` and\n * `this.__originalMappings` properties).\n */\nSourceMapConsumer.prototype._parseMappings =\n  function SourceMapConsumer_parseMappings(aStr, aSourceRoot) {\n    throw new Error(\"Subclasses must implement _parseMappings\");\n  };\n\nSourceMapConsumer.GENERATED_ORDER = 1;\nSourceMapConsumer.ORIGINAL_ORDER = 2;\n\nSourceMapConsumer.GREATEST_LOWER_BOUND = 1;\nSourceMapConsumer.LEAST_UPPER_BOUND = 2;\n\n/**\n * Iterate over each mapping between an original source/line/column and a\n * generated line/column in this source map.\n *\n * @param Function aCallback\n *        The function that is called with each mapping.\n * @param Object aContext\n *        Optional. If specified, this object will be the value of `this` every\n *        time that `aCallback` is called.\n * @param aOrder\n *        Either `SourceMapConsumer.GENERATED_ORDER` or\n *        `SourceMapConsumer.ORIGINAL_ORDER`. Specifies whether you want to\n *        iterate over the mappings sorted by the generated file's line/column\n *        order or the original's source/line/column order, respectively. Defaults to\n *        `SourceMapConsumer.GENERATED_ORDER`.\n */\nSourceMapConsumer.prototype.eachMapping =\n  function SourceMapConsumer_eachMapping(aCallback, aContext, aOrder) {\n    var context = aContext || null;\n    var order = aOrder || SourceMapConsumer.GENERATED_ORDER;\n\n    var mappings;\n    switch (order) {\n    case SourceMapConsumer.GENERATED_ORDER:\n      mappings = this._generatedMappings;\n      break;\n    case SourceMapConsumer.ORIGINAL_ORDER:\n      mappings = this._originalMappings;\n      break;\n    default:\n      throw new Error(\"Unknown order of iteration.\");\n    }\n\n    var sourceRoot = this.sourceRoot;\n    mappings.map(function (mapping) {\n      var source = mapping.source === null ? null : this._sources.at(mapping.source);\n      source = util.computeSourceURL(sourceRoot, source, this._sourceMapURL);\n      return {\n        source: source,\n        generatedLine: mapping.generatedLine,\n        generatedColumn: mapping.generatedColumn,\n        originalLine: mapping.originalLine,\n        originalColumn: mapping.originalColumn,\n        name: mapping.name === null ? null : this._names.at(mapping.name)\n      };\n    }, this).forEach(aCallback, context);\n  };\n\n/**\n * Returns all generated line and column information for the original source,\n * line, and column provided. If no column is provided, returns all mappings\n * corresponding to a either the line we are searching for or the next\n * closest line that has any mappings. Otherwise, returns all mappings\n * corresponding to the given line and either the column we are searching for\n * or the next closest column that has any offsets.\n *\n * The only argument is an object with the following properties:\n *\n *   - source: The filename of the original source.\n *   - line: The line number in the original source.  The line number is 1-based.\n *   - column: Optional. the column number in the original source.\n *    The column number is 0-based.\n *\n * and an array of objects is returned, each with the following properties:\n *\n *   - line: The line number in the generated source, or null.  The\n *    line number is 1-based.\n *   - column: The column number in the generated source, or null.\n *    The column number is 0-based.\n */\nSourceMapConsumer.prototype.allGeneratedPositionsFor =\n  function SourceMapConsumer_allGeneratedPositionsFor(aArgs) {\n    var line = util.getArg(aArgs, 'line');\n\n    // When there is no exact match, BasicSourceMapConsumer.prototype._findMapping\n    // returns the index of the closest mapping less than the needle. By\n    // setting needle.originalColumn to 0, we thus find the last mapping for\n    // the given line, provided such a mapping exists.\n    var needle = {\n      source: util.getArg(aArgs, 'source'),\n      originalLine: line,\n      originalColumn: util.getArg(aArgs, 'column', 0)\n    };\n\n    needle.source = this._findSourceIndex(needle.source);\n    if (needle.source < 0) {\n      return [];\n    }\n\n    var mappings = [];\n\n    var index = this._findMapping(needle,\n                                  this._originalMappings,\n                                  \"originalLine\",\n                                  \"originalColumn\",\n                                  util.compareByOriginalPositions,\n                                  binarySearch.LEAST_UPPER_BOUND);\n    if (index >= 0) {\n      var mapping = this._originalMappings[index];\n\n      if (aArgs.column === undefined) {\n        var originalLine = mapping.originalLine;\n\n        // Iterate until either we run out of mappings, or we run into\n        // a mapping for a different line than the one we found. Since\n        // mappings are sorted, this is guaranteed to find all mappings for\n        // the line we found.\n        while (mapping && mapping.originalLine === originalLine) {\n          mappings.push({\n            line: util.getArg(mapping, 'generatedLine', null),\n            column: util.getArg(mapping, 'generatedColumn', null),\n            lastColumn: util.getArg(mapping, 'lastGeneratedColumn', null)\n          });\n\n          mapping = this._originalMappings[++index];\n        }\n      } else {\n        var originalColumn = mapping.originalColumn;\n\n        // Iterate until either we run out of mappings, or we run into\n        // a mapping for a different line than the one we were searching for.\n        // Since mappings are sorted, this is guaranteed to find all mappings for\n        // the line we are searching for.\n        while (mapping &&\n               mapping.originalLine === line &&\n               mapping.originalColumn == originalColumn) {\n          mappings.push({\n            line: util.getArg(mapping, 'generatedLine', null),\n            column: util.getArg(mapping, 'generatedColumn', null),\n            lastColumn: util.getArg(mapping, 'lastGeneratedColumn', null)\n          });\n\n          mapping = this._originalMappings[++index];\n        }\n      }\n    }\n\n    return mappings;\n  };\n\nexports.SourceMapConsumer = SourceMapConsumer;\n\n/**\n * A BasicSourceMapConsumer instance represents a parsed source map which we can\n * query for information about the original file positions by giving it a file\n * position in the generated source.\n *\n * The first parameter is the raw source map (either as a JSON string, or\n * already parsed to an object). According to the spec, source maps have the\n * following attributes:\n *\n *   - version: Which version of the source map spec this map is following.\n *   - sources: An array of URLs to the original source files.\n *   - names: An array of identifiers which can be referrenced by individual mappings.\n *   - sourceRoot: Optional. The URL root from which all sources are relative.\n *   - sourcesContent: Optional. An array of contents of the original source files.\n *   - mappings: A string of base64 VLQs which contain the actual mappings.\n *   - file: Optional. The generated file this source map is associated with.\n *\n * Here is an example source map, taken from the source map spec[0]:\n *\n *     {\n *       version : 3,\n *       file: \"out.js\",\n *       sourceRoot : \"\",\n *       sources: [\"foo.js\", \"bar.js\"],\n *       names: [\"src\", \"maps\", \"are\", \"fun\"],\n *       mappings: \"AA,AB;;ABCDE;\"\n *     }\n *\n * The second parameter, if given, is a string whose value is the URL\n * at which the source map was found.  This URL is used to compute the\n * sources array.\n *\n * [0]: https://docs.google.com/document/d/1U1RGAehQwRypUTovF1KRlpiOFze0b-_2gc6fAH0KY0k/edit?pli=1#\n */\nfunction BasicSourceMapConsumer(aSourceMap, aSourceMapURL) {\n  var sourceMap = aSourceMap;\n  if (typeof aSourceMap === 'string') {\n    sourceMap = util.parseSourceMapInput(aSourceMap);\n  }\n\n  var version = util.getArg(sourceMap, 'version');\n  var sources = util.getArg(sourceMap, 'sources');\n  // Sass 3.3 leaves out the 'names' array, so we deviate from the spec (which\n  // requires the array) to play nice here.\n  var names = util.getArg(sourceMap, 'names', []);\n  var sourceRoot = util.getArg(sourceMap, 'sourceRoot', null);\n  var sourcesContent = util.getArg(sourceMap, 'sourcesContent', null);\n  var mappings = util.getArg(sourceMap, 'mappings');\n  var file = util.getArg(sourceMap, 'file', null);\n\n  // Once again, Sass deviates from the spec and supplies the version as a\n  // string rather than a number, so we use loose equality checking here.\n  if (version != this._version) {\n    throw new Error('Unsupported version: ' + version);\n  }\n\n  if (sourceRoot) {\n    sourceRoot = util.normalize(sourceRoot);\n  }\n\n  sources = sources\n    .map(String)\n    // Some source maps produce relative source paths like \"./foo.js\" instead of\n    // \"foo.js\".  Normalize these first so that future comparisons will succeed.\n    // See bugzil.la/1090768.\n    .map(util.normalize)\n    // Always ensure that absolute sources are internally stored relative to\n    // the source root, if the source root is absolute. Not doing this would\n    // be particularly problematic when the source root is a prefix of the\n    // source (valid, but why??). See github issue #199 and bugzil.la/1188982.\n    .map(function (source) {\n      return sourceRoot && util.isAbsolute(sourceRoot) && util.isAbsolute(source)\n        ? util.relative(sourceRoot, source)\n        : source;\n    });\n\n  // Pass `true` below to allow duplicate names and sources. While source maps\n  // are intended to be compressed and deduplicated, the TypeScript compiler\n  // sometimes generates source maps with duplicates in them. See Github issue\n  // #72 and bugzil.la/889492.\n  this._names = ArraySet.fromArray(names.map(String), true);\n  this._sources = ArraySet.fromArray(sources, true);\n\n  this._absoluteSources = this._sources.toArray().map(function (s) {\n    return util.computeSourceURL(sourceRoot, s, aSourceMapURL);\n  });\n\n  this.sourceRoot = sourceRoot;\n  this.sourcesContent = sourcesContent;\n  this._mappings = mappings;\n  this._sourceMapURL = aSourceMapURL;\n  this.file = file;\n}\n\nBasicSourceMapConsumer.prototype = Object.create(SourceMapConsumer.prototype);\nBasicSourceMapConsumer.prototype.consumer = SourceMapConsumer;\n\n/**\n * Utility function to find the index of a source.  Returns -1 if not\n * found.\n */\nBasicSourceMapConsumer.prototype._findSourceIndex = function(aSource) {\n  var relativeSource = aSource;\n  if (this.sourceRoot != null) {\n    relativeSource = util.relative(this.sourceRoot, relativeSource);\n  }\n\n  if (this._sources.has(relativeSource)) {\n    return this._sources.indexOf(relativeSource);\n  }\n\n  // Maybe aSource is an absolute URL as returned by |sources|.  In\n  // this case we can't simply undo the transform.\n  var i;\n  for (i = 0; i < this._absoluteSources.length; ++i) {\n    if (this._absoluteSources[i] == aSource) {\n      return i;\n    }\n  }\n\n  return -1;\n};\n\n/**\n * Create a BasicSourceMapConsumer from a SourceMapGenerator.\n *\n * @param SourceMapGenerator aSourceMap\n *        The source map that will be consumed.\n * @param String aSourceMapURL\n *        The URL at which the source map can be found (optional)\n * @returns BasicSourceMapConsumer\n */\nBasicSourceMapConsumer.fromSourceMap =\n  function SourceMapConsumer_fromSourceMap(aSourceMap, aSourceMapURL) {\n    var smc = Object.create(BasicSourceMapConsumer.prototype);\n\n    var names = smc._names = ArraySet.fromArray(aSourceMap._names.toArray(), true);\n    var sources = smc._sources = ArraySet.fromArray(aSourceMap._sources.toArray(), true);\n    smc.sourceRoot = aSourceMap._sourceRoot;\n    smc.sourcesContent = aSourceMap._generateSourcesContent(smc._sources.toArray(),\n                                                            smc.sourceRoot);\n    smc.file = aSourceMap._file;\n    smc._sourceMapURL = aSourceMapURL;\n    smc._absoluteSources = smc._sources.toArray().map(function (s) {\n      return util.computeSourceURL(smc.sourceRoot, s, aSourceMapURL);\n    });\n\n    // Because we are modifying the entries (by converting string sources and\n    // names to indices into the sources and names ArraySets), we have to make\n    // a copy of the entry or else bad things happen. Shared mutable state\n    // strikes again! See github issue #191.\n\n    var generatedMappings = aSourceMap._mappings.toArray().slice();\n    var destGeneratedMappings = smc.__generatedMappings = [];\n    var destOriginalMappings = smc.__originalMappings = [];\n\n    for (var i = 0, length = generatedMappings.length; i < length; i++) {\n      var srcMapping = generatedMappings[i];\n      var destMapping = new Mapping;\n      destMapping.generatedLine = srcMapping.generatedLine;\n      destMapping.generatedColumn = srcMapping.generatedColumn;\n\n      if (srcMapping.source) {\n        destMapping.source = sources.indexOf(srcMapping.source);\n        destMapping.originalLine = srcMapping.originalLine;\n        destMapping.originalColumn = srcMapping.originalColumn;\n\n        if (srcMapping.name) {\n          destMapping.name = names.indexOf(srcMapping.name);\n        }\n\n        destOriginalMappings.push(destMapping);\n      }\n\n      destGeneratedMappings.push(destMapping);\n    }\n\n    quickSort(smc.__originalMappings, util.compareByOriginalPositions);\n\n    return smc;\n  };\n\n/**\n * The version of the source mapping spec that we are consuming.\n */\nBasicSourceMapConsumer.prototype._version = 3;\n\n/**\n * The list of original sources.\n */\nObject.defineProperty(BasicSourceMapConsumer.prototype, 'sources', {\n  get: function () {\n    return this._absoluteSources.slice();\n  }\n});\n\n/**\n * Provide the JIT with a nice shape / hidden class.\n */\nfunction Mapping() {\n  this.generatedLine = 0;\n  this.generatedColumn = 0;\n  this.source = null;\n  this.originalLine = null;\n  this.originalColumn = null;\n  this.name = null;\n}\n\n/**\n * Parse the mappings in a string in to a data structure which we can easily\n * query (the ordered arrays in the `this.__generatedMappings` and\n * `this.__originalMappings` properties).\n */\nBasicSourceMapConsumer.prototype._parseMappings =\n  function SourceMapConsumer_parseMappings(aStr, aSourceRoot) {\n    var generatedLine = 1;\n    var previousGeneratedColumn = 0;\n    var previousOriginalLine = 0;\n    var previousOriginalColumn = 0;\n    var previousSource = 0;\n    var previousName = 0;\n    var length = aStr.length;\n    var index = 0;\n    var cachedSegments = {};\n    var temp = {};\n    var originalMappings = [];\n    var generatedMappings = [];\n    var mapping, str, segment, end, value;\n\n    while (index < length) {\n      if (aStr.charAt(index) === ';') {\n        generatedLine++;\n        index++;\n        previousGeneratedColumn = 0;\n      }\n      else if (aStr.charAt(index) === ',') {\n        index++;\n      }\n      else {\n        mapping = new Mapping();\n        mapping.generatedLine = generatedLine;\n\n        // Because each offset is encoded relative to the previous one,\n        // many segments often have the same encoding. We can exploit this\n        // fact by caching the parsed variable length fields of each segment,\n        // allowing us to avoid a second parse if we encounter the same\n        // segment again.\n        for (end = index; end < length; end++) {\n          if (this._charIsMappingSeparator(aStr, end)) {\n            break;\n          }\n        }\n        str = aStr.slice(index, end);\n\n        segment = cachedSegments[str];\n        if (segment) {\n          index += str.length;\n        } else {\n          segment = [];\n          while (index < end) {\n            base64VLQ.decode(aStr, index, temp);\n            value = temp.value;\n            index = temp.rest;\n            segment.push(value);\n          }\n\n          if (segment.length === 2) {\n            throw new Error('Found a source, but no line and column');\n          }\n\n          if (segment.length === 3) {\n            throw new Error('Found a source and line, but no column');\n          }\n\n          cachedSegments[str] = segment;\n        }\n\n        // Generated column.\n        mapping.generatedColumn = previousGeneratedColumn + segment[0];\n        previousGeneratedColumn = mapping.generatedColumn;\n\n        if (segment.length > 1) {\n          // Original source.\n          mapping.source = previousSource + segment[1];\n          previousSource += segment[1];\n\n          // Original line.\n          mapping.originalLine = previousOriginalLine + segment[2];\n          previousOriginalLine = mapping.originalLine;\n          // Lines are stored 0-based\n          mapping.originalLine += 1;\n\n          // Original column.\n          mapping.originalColumn = previousOriginalColumn + segment[3];\n          previousOriginalColumn = mapping.originalColumn;\n\n          if (segment.length > 4) {\n            // Original name.\n            mapping.name = previousName + segment[4];\n            previousName += segment[4];\n          }\n        }\n\n        generatedMappings.push(mapping);\n        if (typeof mapping.originalLine === 'number') {\n          originalMappings.push(mapping);\n        }\n      }\n    }\n\n    quickSort(generatedMappings, util.compareByGeneratedPositionsDeflated);\n    this.__generatedMappings = generatedMappings;\n\n    quickSort(originalMappings, util.compareByOriginalPositions);\n    this.__originalMappings = originalMappings;\n  };\n\n/**\n * Find the mapping that best matches the hypothetical \"needle\" mapping that\n * we are searching for in the given \"haystack\" of mappings.\n */\nBasicSourceMapConsumer.prototype._findMapping =\n  function SourceMapConsumer_findMapping(aNeedle, aMappings, aLineName,\n                                         aColumnName, aComparator, aBias) {\n    // To return the position we are searching for, we must first find the\n    // mapping for the given position and then return the opposite position it\n    // points to. Because the mappings are sorted, we can use binary search to\n    // find the best mapping.\n\n    if (aNeedle[aLineName] <= 0) {\n      throw new TypeError('Line must be greater than or equal to 1, got '\n                          + aNeedle[aLineName]);\n    }\n    if (aNeedle[aColumnName] < 0) {\n      throw new TypeError('Column must be greater than or equal to 0, got '\n                          + aNeedle[aColumnName]);\n    }\n\n    return binarySearch.search(aNeedle, aMappings, aComparator, aBias);\n  };\n\n/**\n * Compute the last column for each generated mapping. The last column is\n * inclusive.\n */\nBasicSourceMapConsumer.prototype.computeColumnSpans =\n  function SourceMapConsumer_computeColumnSpans() {\n    for (var index = 0; index < this._generatedMappings.length; ++index) {\n      var mapping = this._generatedMappings[index];\n\n      // Mappings do not contain a field for the last generated columnt. We\n      // can come up with an optimistic estimate, however, by assuming that\n      // mappings are contiguous (i.e. given two consecutive mappings, the\n      // first mapping ends where the second one starts).\n      if (index + 1 < this._generatedMappings.length) {\n        var nextMapping = this._generatedMappings[index + 1];\n\n        if (mapping.generatedLine === nextMapping.generatedLine) {\n          mapping.lastGeneratedColumn = nextMapping.generatedColumn - 1;\n          continue;\n        }\n      }\n\n      // The last mapping for each line spans the entire line.\n      mapping.lastGeneratedColumn = Infinity;\n    }\n  };\n\n/**\n * Returns the original source, line, and column information for the generated\n * source's line and column positions provided. The only argument is an object\n * with the following properties:\n *\n *   - line: The line number in the generated source.  The line number\n *     is 1-based.\n *   - column: The column number in the generated source.  The column\n *     number is 0-based.\n *   - bias: Either 'SourceMapConsumer.GREATEST_LOWER_BOUND' or\n *     'SourceMapConsumer.LEAST_UPPER_BOUND'. Specifies whether to return the\n *     closest element that is smaller than or greater than the one we are\n *     searching for, respectively, if the exact element cannot be found.\n *     Defaults to 'SourceMapConsumer.GREATEST_LOWER_BOUND'.\n *\n * and an object is returned with the following properties:\n *\n *   - source: The original source file, or null.\n *   - line: The line number in the original source, or null.  The\n *     line number is 1-based.\n *   - column: The column number in the original source, or null.  The\n *     column number is 0-based.\n *   - name: The original identifier, or null.\n */\nBasicSourceMapConsumer.prototype.originalPositionFor =\n  function SourceMapConsumer_originalPositionFor(aArgs) {\n    var needle = {\n      generatedLine: util.getArg(aArgs, 'line'),\n      generatedColumn: util.getArg(aArgs, 'column')\n    };\n\n    var index = this._findMapping(\n      needle,\n      this._generatedMappings,\n      \"generatedLine\",\n      \"generatedColumn\",\n      util.compareByGeneratedPositionsDeflated,\n      util.getArg(aArgs, 'bias', SourceMapConsumer.GREATEST_LOWER_BOUND)\n    );\n\n    if (index >= 0) {\n      var mapping = this._generatedMappings[index];\n\n      if (mapping.generatedLine === needle.generatedLine) {\n        var source = util.getArg(mapping, 'source', null);\n        if (source !== null) {\n          source = this._sources.at(source);\n          source = util.computeSourceURL(this.sourceRoot, source, this._sourceMapURL);\n        }\n        var name = util.getArg(mapping, 'name', null);\n        if (name !== null) {\n          name = this._names.at(name);\n        }\n        return {\n          source: source,\n          line: util.getArg(mapping, 'originalLine', null),\n          column: util.getArg(mapping, 'originalColumn', null),\n          name: name\n        };\n      }\n    }\n\n    return {\n      source: null,\n      line: null,\n      column: null,\n      name: null\n    };\n  };\n\n/**\n * Return true if we have the source content for every source in the source\n * map, false otherwise.\n */\nBasicSourceMapConsumer.prototype.hasContentsOfAllSources =\n  function BasicSourceMapConsumer_hasContentsOfAllSources() {\n    if (!this.sourcesContent) {\n      return false;\n    }\n    return this.sourcesContent.length >= this._sources.size() &&\n      !this.sourcesContent.some(function (sc) { return sc == null; });\n  };\n\n/**\n * Returns the original source content. The only argument is the url of the\n * original source file. Returns null if no original source content is\n * available.\n */\nBasicSourceMapConsumer.prototype.sourceContentFor =\n  function SourceMapConsumer_sourceContentFor(aSource, nullOnMissing) {\n    if (!this.sourcesContent) {\n      return null;\n    }\n\n    var index = this._findSourceIndex(aSource);\n    if (index >= 0) {\n      return this.sourcesContent[index];\n    }\n\n    var relativeSource = aSource;\n    if (this.sourceRoot != null) {\n      relativeSource = util.relative(this.sourceRoot, relativeSource);\n    }\n\n    var url;\n    if (this.sourceRoot != null\n        && (url = util.urlParse(this.sourceRoot))) {\n      // XXX: file:// URIs and absolute paths lead to unexpected behavior for\n      // many users. We can help them out when they expect file:// URIs to\n      // behave like it would if they were running a local HTTP server. See\n      // https://bugzilla.mozilla.org/show_bug.cgi?id=885597.\n      var fileUriAbsPath = relativeSource.replace(/^file:\\/\\//, \"\");\n      if (url.scheme == \"file\"\n          && this._sources.has(fileUriAbsPath)) {\n        return this.sourcesContent[this._sources.indexOf(fileUriAbsPath)]\n      }\n\n      if ((!url.path || url.path == \"/\")\n          && this._sources.has(\"/\" + relativeSource)) {\n        return this.sourcesContent[this._sources.indexOf(\"/\" + relativeSource)];\n      }\n    }\n\n    // This function is used recursively from\n    // IndexedSourceMapConsumer.prototype.sourceContentFor. In that case, we\n    // don't want to throw if we can't find the source - we just want to\n    // return null, so we provide a flag to exit gracefully.\n    if (nullOnMissing) {\n      return null;\n    }\n    else {\n      throw new Error('\"' + relativeSource + '\" is not in the SourceMap.');\n    }\n  };\n\n/**\n * Returns the generated line and column information for the original source,\n * line, and column positions provided. The only argument is an object with\n * the following properties:\n *\n *   - source: The filename of the original source.\n *   - line: The line number in the original source.  The line number\n *     is 1-based.\n *   - column: The column number in the original source.  The column\n *     number is 0-based.\n *   - bias: Either 'SourceMapConsumer.GREATEST_LOWER_BOUND' or\n *     'SourceMapConsumer.LEAST_UPPER_BOUND'. Specifies whether to return the\n *     closest element that is smaller than or greater than the one we are\n *     searching for, respectively, if the exact element cannot be found.\n *     Defaults to 'SourceMapConsumer.GREATEST_LOWER_BOUND'.\n *\n * and an object is returned with the following properties:\n *\n *   - line: The line number in the generated source, or null.  The\n *     line number is 1-based.\n *   - column: The column number in the generated source, or null.\n *     The column number is 0-based.\n */\nBasicSourceMapConsumer.prototype.generatedPositionFor =\n  function SourceMapConsumer_generatedPositionFor(aArgs) {\n    var source = util.getArg(aArgs, 'source');\n    source = this._findSourceIndex(source);\n    if (source < 0) {\n      return {\n        line: null,\n        column: null,\n        lastColumn: null\n      };\n    }\n\n    var needle = {\n      source: source,\n      originalLine: util.getArg(aArgs, 'line'),\n      originalColumn: util.getArg(aArgs, 'column')\n    };\n\n    var index = this._findMapping(\n      needle,\n      this._originalMappings,\n      \"originalLine\",\n      \"originalColumn\",\n      util.compareByOriginalPositions,\n      util.getArg(aArgs, 'bias', SourceMapConsumer.GREATEST_LOWER_BOUND)\n    );\n\n    if (index >= 0) {\n      var mapping = this._originalMappings[index];\n\n      if (mapping.source === needle.source) {\n        return {\n          line: util.getArg(mapping, 'generatedLine', null),\n          column: util.getArg(mapping, 'generatedColumn', null),\n          lastColumn: util.getArg(mapping, 'lastGeneratedColumn', null)\n        };\n      }\n    }\n\n    return {\n      line: null,\n      column: null,\n      lastColumn: null\n    };\n  };\n\nexports.BasicSourceMapConsumer = BasicSourceMapConsumer;\n\n/**\n * An IndexedSourceMapConsumer instance represents a parsed source map which\n * we can query for information. It differs from BasicSourceMapConsumer in\n * that it takes \"indexed\" source maps (i.e. ones with a \"sections\" field) as\n * input.\n *\n * The first parameter is a raw source map (either as a JSON string, or already\n * parsed to an object). According to the spec for indexed source maps, they\n * have the following attributes:\n *\n *   - version: Which version of the source map spec this map is following.\n *   - file: Optional. The generated file this source map is associated with.\n *   - sections: A list of section definitions.\n *\n * Each value under the \"sections\" field has two fields:\n *   - offset: The offset into the original specified at which this section\n *       begins to apply, defined as an object with a \"line\" and \"column\"\n *       field.\n *   - map: A source map definition. This source map could also be indexed,\n *       but doesn't have to be.\n *\n * Instead of the \"map\" field, it's also possible to have a \"url\" field\n * specifying a URL to retrieve a source map from, but that's currently\n * unsupported.\n *\n * Here's an example source map, taken from the source map spec[0], but\n * modified to omit a section which uses the \"url\" field.\n *\n *  {\n *    version : 3,\n *    file: \"app.js\",\n *    sections: [{\n *      offset: {line:100, column:10},\n *      map: {\n *        version : 3,\n *        file: \"section.js\",\n *        sources: [\"foo.js\", \"bar.js\"],\n *        names: [\"src\", \"maps\", \"are\", \"fun\"],\n *        mappings: \"AAAA,E;;ABCDE;\"\n *      }\n *    }],\n *  }\n *\n * The second parameter, if given, is a string whose value is the URL\n * at which the source map was found.  This URL is used to compute the\n * sources array.\n *\n * [0]: https://docs.google.com/document/d/1U1RGAehQwRypUTovF1KRlpiOFze0b-_2gc6fAH0KY0k/edit#heading=h.535es3xeprgt\n */\nfunction IndexedSourceMapConsumer(aSourceMap, aSourceMapURL) {\n  var sourceMap = aSourceMap;\n  if (typeof aSourceMap === 'string') {\n    sourceMap = util.parseSourceMapInput(aSourceMap);\n  }\n\n  var version = util.getArg(sourceMap, 'version');\n  var sections = util.getArg(sourceMap, 'sections');\n\n  if (version != this._version) {\n    throw new Error('Unsupported version: ' + version);\n  }\n\n  this._sources = new ArraySet();\n  this._names = new ArraySet();\n\n  var lastOffset = {\n    line: -1,\n    column: 0\n  };\n  this._sections = sections.map(function (s) {\n    if (s.url) {\n      // The url field will require support for asynchronicity.\n      // See https://github.com/mozilla/source-map/issues/16\n      throw new Error('Support for url field in sections not implemented.');\n    }\n    var offset = util.getArg(s, 'offset');\n    var offsetLine = util.getArg(offset, 'line');\n    var offsetColumn = util.getArg(offset, 'column');\n\n    if (offsetLine < lastOffset.line ||\n        (offsetLine === lastOffset.line && offsetColumn < lastOffset.column)) {\n      throw new Error('Section offsets must be ordered and non-overlapping.');\n    }\n    lastOffset = offset;\n\n    return {\n      generatedOffset: {\n        // The offset fields are 0-based, but we use 1-based indices when\n        // encoding/decoding from VLQ.\n        generatedLine: offsetLine + 1,\n        generatedColumn: offsetColumn + 1\n      },\n      consumer: new SourceMapConsumer(util.getArg(s, 'map'), aSourceMapURL)\n    }\n  });\n}\n\nIndexedSourceMapConsumer.prototype = Object.create(SourceMapConsumer.prototype);\nIndexedSourceMapConsumer.prototype.constructor = SourceMapConsumer;\n\n/**\n * The version of the source mapping spec that we are consuming.\n */\nIndexedSourceMapConsumer.prototype._version = 3;\n\n/**\n * The list of original sources.\n */\nObject.defineProperty(IndexedSourceMapConsumer.prototype, 'sources', {\n  get: function () {\n    var sources = [];\n    for (var i = 0; i < this._sections.length; i++) {\n      for (var j = 0; j < this._sections[i].consumer.sources.length; j++) {\n        sources.push(this._sections[i].consumer.sources[j]);\n      }\n    }\n    return sources;\n  }\n});\n\n/**\n * Returns the original source, line, and column information for the generated\n * source's line and column positions provided. The only argument is an object\n * with the following properties:\n *\n *   - line: The line number in the generated source.  The line number\n *     is 1-based.\n *   - column: The column number in the generated source.  The column\n *     number is 0-based.\n *\n * and an object is returned with the following properties:\n *\n *   - source: The original source file, or null.\n *   - line: The line number in the original source, or null.  The\n *     line number is 1-based.\n *   - column: The column number in the original source, or null.  The\n *     column number is 0-based.\n *   - name: The original identifier, or null.\n */\nIndexedSourceMapConsumer.prototype.originalPositionFor =\n  function IndexedSourceMapConsumer_originalPositionFor(aArgs) {\n    var needle = {\n      generatedLine: util.getArg(aArgs, 'line'),\n      generatedColumn: util.getArg(aArgs, 'column')\n    };\n\n    // Find the section containing the generated position we're trying to map\n    // to an original position.\n    var sectionIndex = binarySearch.search(needle, this._sections,\n      function(needle, section) {\n        var cmp = needle.generatedLine - section.generatedOffset.generatedLine;\n        if (cmp) {\n          return cmp;\n        }\n\n        return (needle.generatedColumn -\n                section.generatedOffset.generatedColumn);\n      });\n    var section = this._sections[sectionIndex];\n\n    if (!section) {\n      return {\n        source: null,\n        line: null,\n        column: null,\n        name: null\n      };\n    }\n\n    return section.consumer.originalPositionFor({\n      line: needle.generatedLine -\n        (section.generatedOffset.generatedLine - 1),\n      column: needle.generatedColumn -\n        (section.generatedOffset.generatedLine === needle.generatedLine\n         ? section.generatedOffset.generatedColumn - 1\n         : 0),\n      bias: aArgs.bias\n    });\n  };\n\n/**\n * Return true if we have the source content for every source in the source\n * map, false otherwise.\n */\nIndexedSourceMapConsumer.prototype.hasContentsOfAllSources =\n  function IndexedSourceMapConsumer_hasContentsOfAllSources() {\n    return this._sections.every(function (s) {\n      return s.consumer.hasContentsOfAllSources();\n    });\n  };\n\n/**\n * Returns the original source content. The only argument is the url of the\n * original source file. Returns null if no original source content is\n * available.\n */\nIndexedSourceMapConsumer.prototype.sourceContentFor =\n  function IndexedSourceMapConsumer_sourceContentFor(aSource, nullOnMissing) {\n    for (var i = 0; i < this._sections.length; i++) {\n      var section = this._sections[i];\n\n      var content = section.consumer.sourceContentFor(aSource, true);\n      if (content) {\n        return content;\n      }\n    }\n    if (nullOnMissing) {\n      return null;\n    }\n    else {\n      throw new Error('\"' + aSource + '\" is not in the SourceMap.');\n    }\n  };\n\n/**\n * Returns the generated line and column information for the original source,\n * line, and column positions provided. The only argument is an object with\n * the following properties:\n *\n *   - source: The filename of the original source.\n *   - line: The line number in the original source.  The line number\n *     is 1-based.\n *   - column: The column number in the original source.  The column\n *     number is 0-based.\n *\n * and an object is returned with the following properties:\n *\n *   - line: The line number in the generated source, or null.  The\n *     line number is 1-based. \n *   - column: The column number in the generated source, or null.\n *     The column number is 0-based.\n */\nIndexedSourceMapConsumer.prototype.generatedPositionFor =\n  function IndexedSourceMapConsumer_generatedPositionFor(aArgs) {\n    for (var i = 0; i < this._sections.length; i++) {\n      var section = this._sections[i];\n\n      // Only consider this section if the requested source is in the list of\n      // sources of the consumer.\n      if (section.consumer._findSourceIndex(util.getArg(aArgs, 'source')) === -1) {\n        continue;\n      }\n      var generatedPosition = section.consumer.generatedPositionFor(aArgs);\n      if (generatedPosition) {\n        var ret = {\n          line: generatedPosition.line +\n            (section.generatedOffset.generatedLine - 1),\n          column: generatedPosition.column +\n            (section.generatedOffset.generatedLine === generatedPosition.line\n             ? section.generatedOffset.generatedColumn - 1\n             : 0)\n        };\n        return ret;\n      }\n    }\n\n    return {\n      line: null,\n      column: null\n    };\n  };\n\n/**\n * Parse the mappings in a string in to a data structure which we can easily\n * query (the ordered arrays in the `this.__generatedMappings` and\n * `this.__originalMappings` properties).\n */\nIndexedSourceMapConsumer.prototype._parseMappings =\n  function IndexedSourceMapConsumer_parseMappings(aStr, aSourceRoot) {\n    this.__generatedMappings = [];\n    this.__originalMappings = [];\n    for (var i = 0; i < this._sections.length; i++) {\n      var section = this._sections[i];\n      var sectionMappings = section.consumer._generatedMappings;\n      for (var j = 0; j < sectionMappings.length; j++) {\n        var mapping = sectionMappings[j];\n\n        var source = section.consumer._sources.at(mapping.source);\n        source = util.computeSourceURL(section.consumer.sourceRoot, source, this._sourceMapURL);\n        this._sources.add(source);\n        source = this._sources.indexOf(source);\n\n        var name = null;\n        if (mapping.name) {\n          name = section.consumer._names.at(mapping.name);\n          this._names.add(name);\n          name = this._names.indexOf(name);\n        }\n\n        // The mappings coming from the consumer for the section have\n        // generated positions relative to the start of the section, so we\n        // need to offset them to be relative to the start of the concatenated\n        // generated file.\n        var adjustedMapping = {\n          source: source,\n          generatedLine: mapping.generatedLine +\n            (section.generatedOffset.generatedLine - 1),\n          generatedColumn: mapping.generatedColumn +\n            (section.generatedOffset.generatedLine === mapping.generatedLine\n            ? section.generatedOffset.generatedColumn - 1\n            : 0),\n          originalLine: mapping.originalLine,\n          originalColumn: mapping.originalColumn,\n          name: name\n        };\n\n        this.__generatedMappings.push(adjustedMapping);\n        if (typeof adjustedMapping.originalLine === 'number') {\n          this.__originalMappings.push(adjustedMapping);\n        }\n      }\n    }\n\n    quickSort(this.__generatedMappings, util.compareByGeneratedPositionsDeflated);\n    quickSort(this.__originalMappings, util.compareByOriginalPositions);\n  };\n\nexports.IndexedSourceMapConsumer = IndexedSourceMapConsumer;\n","/**!\n * Sortable 1.10.2\n * @author\tRubaXa   <trash@rubaxa.org>\n * @author\towenm    <owen23355@gmail.com>\n * @license MIT\n */\nfunction _typeof(obj) {\n  if (typeof Symbol === \"function\" && typeof Symbol.iterator === \"symbol\") {\n    _typeof = function (obj) {\n      return typeof obj;\n    };\n  } else {\n    _typeof = function (obj) {\n      return obj && typeof Symbol === \"function\" && obj.constructor === Symbol && obj !== Symbol.prototype ? \"symbol\" : typeof obj;\n    };\n  }\n\n  return _typeof(obj);\n}\n\nfunction _defineProperty(obj, key, value) {\n  if (key in obj) {\n    Object.defineProperty(obj, key, {\n      value: value,\n      enumerable: true,\n      configurable: true,\n      writable: true\n    });\n  } else {\n    obj[key] = value;\n  }\n\n  return obj;\n}\n\nfunction _extends() {\n  _extends = Object.assign || function (target) {\n    for (var i = 1; i < arguments.length; i++) {\n      var source = arguments[i];\n\n      for (var key in source) {\n        if (Object.prototype.hasOwnProperty.call(source, key)) {\n          target[key] = source[key];\n        }\n      }\n    }\n\n    return target;\n  };\n\n  return _extends.apply(this, arguments);\n}\n\nfunction _objectSpread(target) {\n  for (var i = 1; i < arguments.length; i++) {\n    var source = arguments[i] != null ? arguments[i] : {};\n    var ownKeys = Object.keys(source);\n\n    if (typeof Object.getOwnPropertySymbols === 'function') {\n      ownKeys = ownKeys.concat(Object.getOwnPropertySymbols(source).filter(function (sym) {\n        return Object.getOwnPropertyDescriptor(source, sym).enumerable;\n      }));\n    }\n\n    ownKeys.forEach(function (key) {\n      _defineProperty(target, key, source[key]);\n    });\n  }\n\n  return target;\n}\n\nfunction _objectWithoutPropertiesLoose(source, excluded) {\n  if (source == null) return {};\n  var target = {};\n  var sourceKeys = Object.keys(source);\n  var key, i;\n\n  for (i = 0; i < sourceKeys.length; i++) {\n    key = sourceKeys[i];\n    if (excluded.indexOf(key) >= 0) continue;\n    target[key] = source[key];\n  }\n\n  return target;\n}\n\nfunction _objectWithoutProperties(source, excluded) {\n  if (source == null) return {};\n\n  var target = _objectWithoutPropertiesLoose(source, excluded);\n\n  var key, i;\n\n  if (Object.getOwnPropertySymbols) {\n    var sourceSymbolKeys = Object.getOwnPropertySymbols(source);\n\n    for (i = 0; i < sourceSymbolKeys.length; i++) {\n      key = sourceSymbolKeys[i];\n      if (excluded.indexOf(key) >= 0) continue;\n      if (!Object.prototype.propertyIsEnumerable.call(source, key)) continue;\n      target[key] = source[key];\n    }\n  }\n\n  return target;\n}\n\nfunction _toConsumableArray(arr) {\n  return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _nonIterableSpread();\n}\n\nfunction _arrayWithoutHoles(arr) {\n  if (Array.isArray(arr)) {\n    for (var i = 0, arr2 = new Array(arr.length); i < arr.length; i++) arr2[i] = arr[i];\n\n    return arr2;\n  }\n}\n\nfunction _iterableToArray(iter) {\n  if (Symbol.iterator in Object(iter) || Object.prototype.toString.call(iter) === \"[object Arguments]\") return Array.from(iter);\n}\n\nfunction _nonIterableSpread() {\n  throw new TypeError(\"Invalid attempt to spread non-iterable instance\");\n}\n\nvar version = \"1.10.2\";\n\nfunction userAgent(pattern) {\n  if (typeof window !== 'undefined' && window.navigator) {\n    return !!\n    /*@__PURE__*/\n    navigator.userAgent.match(pattern);\n  }\n}\n\nvar IE11OrLess = userAgent(/(?:Trident.*rv[ :]?11\\.|msie|iemobile|Windows Phone)/i);\nvar Edge = userAgent(/Edge/i);\nvar FireFox = userAgent(/firefox/i);\nvar Safari = userAgent(/safari/i) && !userAgent(/chrome/i) && !userAgent(/android/i);\nvar IOS = userAgent(/iP(ad|od|hone)/i);\nvar ChromeForAndroid = userAgent(/chrome/i) && userAgent(/android/i);\n\nvar captureMode = {\n  capture: false,\n  passive: false\n};\n\nfunction on(el, event, fn) {\n  el.addEventListener(event, fn, !IE11OrLess && captureMode);\n}\n\nfunction off(el, event, fn) {\n  el.removeEventListener(event, fn, !IE11OrLess && captureMode);\n}\n\nfunction matches(\n/**HTMLElement*/\nel,\n/**String*/\nselector) {\n  if (!selector) return;\n  selector[0] === '>' && (selector = selector.substring(1));\n\n  if (el) {\n    try {\n      if (el.matches) {\n        return el.matches(selector);\n      } else if (el.msMatchesSelector) {\n        return el.msMatchesSelector(selector);\n      } else if (el.webkitMatchesSelector) {\n        return el.webkitMatchesSelector(selector);\n      }\n    } catch (_) {\n      return false;\n    }\n  }\n\n  return false;\n}\n\nfunction getParentOrHost(el) {\n  return el.host && el !== document && el.host.nodeType ? el.host : el.parentNode;\n}\n\nfunction closest(\n/**HTMLElement*/\nel,\n/**String*/\nselector,\n/**HTMLElement*/\nctx, includeCTX) {\n  if (el) {\n    ctx = ctx || document;\n\n    do {\n      if (selector != null && (selector[0] === '>' ? el.parentNode === ctx && matches(el, selector) : matches(el, selector)) || includeCTX && el === ctx) {\n        return el;\n      }\n\n      if (el === ctx) break;\n      /* jshint boss:true */\n    } while (el = getParentOrHost(el));\n  }\n\n  return null;\n}\n\nvar R_SPACE = /\\s+/g;\n\nfunction toggleClass(el, name, state) {\n  if (el && name) {\n    if (el.classList) {\n      el.classList[state ? 'add' : 'remove'](name);\n    } else {\n      var className = (' ' + el.className + ' ').replace(R_SPACE, ' ').replace(' ' + name + ' ', ' ');\n      el.className = (className + (state ? ' ' + name : '')).replace(R_SPACE, ' ');\n    }\n  }\n}\n\nfunction css(el, prop, val) {\n  var style = el && el.style;\n\n  if (style) {\n    if (val === void 0) {\n      if (document.defaultView && document.defaultView.getComputedStyle) {\n        val = document.defaultView.getComputedStyle(el, '');\n      } else if (el.currentStyle) {\n        val = el.currentStyle;\n      }\n\n      return prop === void 0 ? val : val[prop];\n    } else {\n      if (!(prop in style) && prop.indexOf('webkit') === -1) {\n        prop = '-webkit-' + prop;\n      }\n\n      style[prop] = val + (typeof val === 'string' ? '' : 'px');\n    }\n  }\n}\n\nfunction matrix(el, selfOnly) {\n  var appliedTransforms = '';\n\n  if (typeof el === 'string') {\n    appliedTransforms = el;\n  } else {\n    do {\n      var transform = css(el, 'transform');\n\n      if (transform && transform !== 'none') {\n        appliedTransforms = transform + ' ' + appliedTransforms;\n      }\n      /* jshint boss:true */\n\n    } while (!selfOnly && (el = el.parentNode));\n  }\n\n  var matrixFn = window.DOMMatrix || window.WebKitCSSMatrix || window.CSSMatrix || window.MSCSSMatrix;\n  /*jshint -W056 */\n\n  return matrixFn && new matrixFn(appliedTransforms);\n}\n\nfunction find(ctx, tagName, iterator) {\n  if (ctx) {\n    var list = ctx.getElementsByTagName(tagName),\n        i = 0,\n        n = list.length;\n\n    if (iterator) {\n      for (; i < n; i++) {\n        iterator(list[i], i);\n      }\n    }\n\n    return list;\n  }\n\n  return [];\n}\n\nfunction getWindowScrollingElement() {\n  var scrollingElement = document.scrollingElement;\n\n  if (scrollingElement) {\n    return scrollingElement;\n  } else {\n    return document.documentElement;\n  }\n}\n/**\r\n * Returns the \"bounding client rect\" of given element\r\n * @param  {HTMLElement} el                       The element whose boundingClientRect is wanted\r\n * @param  {[Boolean]} relativeToContainingBlock  Whether the rect should be relative to the containing block of (including) the container\r\n * @param  {[Boolean]} relativeToNonStaticParent  Whether the rect should be relative to the relative parent of (including) the contaienr\r\n * @param  {[Boolean]} undoScale                  Whether the container's scale() should be undone\r\n * @param  {[HTMLElement]} container              The parent the element will be placed in\r\n * @return {Object}                               The boundingClientRect of el, with specified adjustments\r\n */\n\n\nfunction getRect(el, relativeToContainingBlock, relativeToNonStaticParent, undoScale, container) {\n  if (!el.getBoundingClientRect && el !== window) return;\n  var elRect, top, left, bottom, right, height, width;\n\n  if (el !== window && el !== getWindowScrollingElement()) {\n    elRect = el.getBoundingClientRect();\n    top = elRect.top;\n    left = elRect.left;\n    bottom = elRect.bottom;\n    right = elRect.right;\n    height = elRect.height;\n    width = elRect.width;\n  } else {\n    top = 0;\n    left = 0;\n    bottom = window.innerHeight;\n    right = window.innerWidth;\n    height = window.innerHeight;\n    width = window.innerWidth;\n  }\n\n  if ((relativeToContainingBlock || relativeToNonStaticParent) && el !== window) {\n    // Adjust for translate()\n    container = container || el.parentNode; // solves #1123 (see: https://stackoverflow.com/a/37953806/6088312)\n    // Not needed on <= IE11\n\n    if (!IE11OrLess) {\n      do {\n        if (container && container.getBoundingClientRect && (css(container, 'transform') !== 'none' || relativeToNonStaticParent && css(container, 'position') !== 'static')) {\n          var containerRect = container.getBoundingClientRect(); // Set relative to edges of padding box of container\n\n          top -= containerRect.top + parseInt(css(container, 'border-top-width'));\n          left -= containerRect.left + parseInt(css(container, 'border-left-width'));\n          bottom = top + elRect.height;\n          right = left + elRect.width;\n          break;\n        }\n        /* jshint boss:true */\n\n      } while (container = container.parentNode);\n    }\n  }\n\n  if (undoScale && el !== window) {\n    // Adjust for scale()\n    var elMatrix = matrix(container || el),\n        scaleX = elMatrix && elMatrix.a,\n        scaleY = elMatrix && elMatrix.d;\n\n    if (elMatrix) {\n      top /= scaleY;\n      left /= scaleX;\n      width /= scaleX;\n      height /= scaleY;\n      bottom = top + height;\n      right = left + width;\n    }\n  }\n\n  return {\n    top: top,\n    left: left,\n    bottom: bottom,\n    right: right,\n    width: width,\n    height: height\n  };\n}\n/**\r\n * Checks if a side of an element is scrolled past a side of its parents\r\n * @param  {HTMLElement}  el           The element who's side being scrolled out of view is in question\r\n * @param  {String}       elSide       Side of the element in question ('top', 'left', 'right', 'bottom')\r\n * @param  {String}       parentSide   Side of the parent in question ('top', 'left', 'right', 'bottom')\r\n * @return {HTMLElement}               The parent scroll element that the el's side is scrolled past, or null if there is no such element\r\n */\n\n\nfunction isScrolledPast(el, elSide, parentSide) {\n  var parent = getParentAutoScrollElement(el, true),\n      elSideVal = getRect(el)[elSide];\n  /* jshint boss:true */\n\n  while (parent) {\n    var parentSideVal = getRect(parent)[parentSide],\n        visible = void 0;\n\n    if (parentSide === 'top' || parentSide === 'left') {\n      visible = elSideVal >= parentSideVal;\n    } else {\n      visible = elSideVal <= parentSideVal;\n    }\n\n    if (!visible) return parent;\n    if (parent === getWindowScrollingElement()) break;\n    parent = getParentAutoScrollElement(parent, false);\n  }\n\n  return false;\n}\n/**\r\n * Gets nth child of el, ignoring hidden children, sortable's elements (does not ignore clone if it's visible)\r\n * and non-draggable elements\r\n * @param  {HTMLElement} el       The parent element\r\n * @param  {Number} childNum      The index of the child\r\n * @param  {Object} options       Parent Sortable's options\r\n * @return {HTMLElement}          The child at index childNum, or null if not found\r\n */\n\n\nfunction getChild(el, childNum, options) {\n  var currentChild = 0,\n      i = 0,\n      children = el.children;\n\n  while (i < children.length) {\n    if (children[i].style.display !== 'none' && children[i] !== Sortable.ghost && children[i] !== Sortable.dragged && closest(children[i], options.draggable, el, false)) {\n      if (currentChild === childNum) {\n        return children[i];\n      }\n\n      currentChild++;\n    }\n\n    i++;\n  }\n\n  return null;\n}\n/**\r\n * Gets the last child in the el, ignoring ghostEl or invisible elements (clones)\r\n * @param  {HTMLElement} el       Parent element\r\n * @param  {selector} selector    Any other elements that should be ignored\r\n * @return {HTMLElement}          The last child, ignoring ghostEl\r\n */\n\n\nfunction lastChild(el, selector) {\n  var last = el.lastElementChild;\n\n  while (last && (last === Sortable.ghost || css(last, 'display') === 'none' || selector && !matches(last, selector))) {\n    last = last.previousElementSibling;\n  }\n\n  return last || null;\n}\n/**\r\n * Returns the index of an element within its parent for a selected set of\r\n * elements\r\n * @param  {HTMLElement} el\r\n * @param  {selector} selector\r\n * @return {number}\r\n */\n\n\nfunction index(el, selector) {\n  var index = 0;\n\n  if (!el || !el.parentNode) {\n    return -1;\n  }\n  /* jshint boss:true */\n\n\n  while (el = el.previousElementSibling) {\n    if (el.nodeName.toUpperCase() !== 'TEMPLATE' && el !== Sortable.clone && (!selector || matches(el, selector))) {\n      index++;\n    }\n  }\n\n  return index;\n}\n/**\r\n * Returns the scroll offset of the given element, added with all the scroll offsets of parent elements.\r\n * The value is returned in real pixels.\r\n * @param  {HTMLElement} el\r\n * @return {Array}             Offsets in the format of [left, top]\r\n */\n\n\nfunction getRelativeScrollOffset(el) {\n  var offsetLeft = 0,\n      offsetTop = 0,\n      winScroller = getWindowScrollingElement();\n\n  if (el) {\n    do {\n      var elMatrix = matrix(el),\n          scaleX = elMatrix.a,\n          scaleY = elMatrix.d;\n      offsetLeft += el.scrollLeft * scaleX;\n      offsetTop += el.scrollTop * scaleY;\n    } while (el !== winScroller && (el = el.parentNode));\n  }\n\n  return [offsetLeft, offsetTop];\n}\n/**\r\n * Returns the index of the object within the given array\r\n * @param  {Array} arr   Array that may or may not hold the object\r\n * @param  {Object} obj  An object that has a key-value pair unique to and identical to a key-value pair in the object you want to find\r\n * @return {Number}      The index of the object in the array, or -1\r\n */\n\n\nfunction indexOfObject(arr, obj) {\n  for (var i in arr) {\n    if (!arr.hasOwnProperty(i)) continue;\n\n    for (var key in obj) {\n      if (obj.hasOwnProperty(key) && obj[key] === arr[i][key]) return Number(i);\n    }\n  }\n\n  return -1;\n}\n\nfunction getParentAutoScrollElement(el, includeSelf) {\n  // skip to window\n  if (!el || !el.getBoundingClientRect) return getWindowScrollingElement();\n  var elem = el;\n  var gotSelf = false;\n\n  do {\n    // we don't need to get elem css if it isn't even overflowing in the first place (performance)\n    if (elem.clientWidth < elem.scrollWidth || elem.clientHeight < elem.scrollHeight) {\n      var elemCSS = css(elem);\n\n      if (elem.clientWidth < elem.scrollWidth && (elemCSS.overflowX == 'auto' || elemCSS.overflowX == 'scroll') || elem.clientHeight < elem.scrollHeight && (elemCSS.overflowY == 'auto' || elemCSS.overflowY == 'scroll')) {\n        if (!elem.getBoundingClientRect || elem === document.body) return getWindowScrollingElement();\n        if (gotSelf || includeSelf) return elem;\n        gotSelf = true;\n      }\n    }\n    /* jshint boss:true */\n\n  } while (elem = elem.parentNode);\n\n  return getWindowScrollingElement();\n}\n\nfunction extend(dst, src) {\n  if (dst && src) {\n    for (var key in src) {\n      if (src.hasOwnProperty(key)) {\n        dst[key] = src[key];\n      }\n    }\n  }\n\n  return dst;\n}\n\nfunction isRectEqual(rect1, rect2) {\n  return Math.round(rect1.top) === Math.round(rect2.top) && Math.round(rect1.left) === Math.round(rect2.left) && Math.round(rect1.height) === Math.round(rect2.height) && Math.round(rect1.width) === Math.round(rect2.width);\n}\n\nvar _throttleTimeout;\n\nfunction throttle(callback, ms) {\n  return function () {\n    if (!_throttleTimeout) {\n      var args = arguments,\n          _this = this;\n\n      if (args.length === 1) {\n        callback.call(_this, args[0]);\n      } else {\n        callback.apply(_this, args);\n      }\n\n      _throttleTimeout = setTimeout(function () {\n        _throttleTimeout = void 0;\n      }, ms);\n    }\n  };\n}\n\nfunction cancelThrottle() {\n  clearTimeout(_throttleTimeout);\n  _throttleTimeout = void 0;\n}\n\nfunction scrollBy(el, x, y) {\n  el.scrollLeft += x;\n  el.scrollTop += y;\n}\n\nfunction clone(el) {\n  var Polymer = window.Polymer;\n  var $ = window.jQuery || window.Zepto;\n\n  if (Polymer && Polymer.dom) {\n    return Polymer.dom(el).cloneNode(true);\n  } else if ($) {\n    return $(el).clone(true)[0];\n  } else {\n    return el.cloneNode(true);\n  }\n}\n\nfunction setRect(el, rect) {\n  css(el, 'position', 'absolute');\n  css(el, 'top', rect.top);\n  css(el, 'left', rect.left);\n  css(el, 'width', rect.width);\n  css(el, 'height', rect.height);\n}\n\nfunction unsetRect(el) {\n  css(el, 'position', '');\n  css(el, 'top', '');\n  css(el, 'left', '');\n  css(el, 'width', '');\n  css(el, 'height', '');\n}\n\nvar expando = 'Sortable' + new Date().getTime();\n\nfunction AnimationStateManager() {\n  var animationStates = [],\n      animationCallbackId;\n  return {\n    captureAnimationState: function captureAnimationState() {\n      animationStates = [];\n      if (!this.options.animation) return;\n      var children = [].slice.call(this.el.children);\n      children.forEach(function (child) {\n        if (css(child, 'display') === 'none' || child === Sortable.ghost) return;\n        animationStates.push({\n          target: child,\n          rect: getRect(child)\n        });\n\n        var fromRect = _objectSpread({}, animationStates[animationStates.length - 1].rect); // If animating: compensate for current animation\n\n\n        if (child.thisAnimationDuration) {\n          var childMatrix = matrix(child, true);\n\n          if (childMatrix) {\n            fromRect.top -= childMatrix.f;\n            fromRect.left -= childMatrix.e;\n          }\n        }\n\n        child.fromRect = fromRect;\n      });\n    },\n    addAnimationState: function addAnimationState(state) {\n      animationStates.push(state);\n    },\n    removeAnimationState: function removeAnimationState(target) {\n      animationStates.splice(indexOfObject(animationStates, {\n        target: target\n      }), 1);\n    },\n    animateAll: function animateAll(callback) {\n      var _this = this;\n\n      if (!this.options.animation) {\n        clearTimeout(animationCallbackId);\n        if (typeof callback === 'function') callback();\n        return;\n      }\n\n      var animating = false,\n          animationTime = 0;\n      animationStates.forEach(function (state) {\n        var time = 0,\n            target = state.target,\n            fromRect = target.fromRect,\n            toRect = getRect(target),\n            prevFromRect = target.prevFromRect,\n            prevToRect = target.prevToRect,\n            animatingRect = state.rect,\n            targetMatrix = matrix(target, true);\n\n        if (targetMatrix) {\n          // Compensate for current animation\n          toRect.top -= targetMatrix.f;\n          toRect.left -= targetMatrix.e;\n        }\n\n        target.toRect = toRect;\n\n        if (target.thisAnimationDuration) {\n          // Could also check if animatingRect is between fromRect and toRect\n          if (isRectEqual(prevFromRect, toRect) && !isRectEqual(fromRect, toRect) && // Make sure animatingRect is on line between toRect & fromRect\n          (animatingRect.top - toRect.top) / (animatingRect.left - toRect.left) === (fromRect.top - toRect.top) / (fromRect.left - toRect.left)) {\n            // If returning to same place as started from animation and on same axis\n            time = calculateRealTime(animatingRect, prevFromRect, prevToRect, _this.options);\n          }\n        } // if fromRect != toRect: animate\n\n\n        if (!isRectEqual(toRect, fromRect)) {\n          target.prevFromRect = fromRect;\n          target.prevToRect = toRect;\n\n          if (!time) {\n            time = _this.options.animation;\n          }\n\n          _this.animate(target, animatingRect, toRect, time);\n        }\n\n        if (time) {\n          animating = true;\n          animationTime = Math.max(animationTime, time);\n          clearTimeout(target.animationResetTimer);\n          target.animationResetTimer = setTimeout(function () {\n            target.animationTime = 0;\n            target.prevFromRect = null;\n            target.fromRect = null;\n            target.prevToRect = null;\n            target.thisAnimationDuration = null;\n          }, time);\n          target.thisAnimationDuration = time;\n        }\n      });\n      clearTimeout(animationCallbackId);\n\n      if (!animating) {\n        if (typeof callback === 'function') callback();\n      } else {\n        animationCallbackId = setTimeout(function () {\n          if (typeof callback === 'function') callback();\n        }, animationTime);\n      }\n\n      animationStates = [];\n    },\n    animate: function animate(target, currentRect, toRect, duration) {\n      if (duration) {\n        css(target, 'transition', '');\n        css(target, 'transform', '');\n        var elMatrix = matrix(this.el),\n            scaleX = elMatrix && elMatrix.a,\n            scaleY = elMatrix && elMatrix.d,\n            translateX = (currentRect.left - toRect.left) / (scaleX || 1),\n            translateY = (currentRect.top - toRect.top) / (scaleY || 1);\n        target.animatingX = !!translateX;\n        target.animatingY = !!translateY;\n        css(target, 'transform', 'translate3d(' + translateX + 'px,' + translateY + 'px,0)');\n        repaint(target); // repaint\n\n        css(target, 'transition', 'transform ' + duration + 'ms' + (this.options.easing ? ' ' + this.options.easing : ''));\n        css(target, 'transform', 'translate3d(0,0,0)');\n        typeof target.animated === 'number' && clearTimeout(target.animated);\n        target.animated = setTimeout(function () {\n          css(target, 'transition', '');\n          css(target, 'transform', '');\n          target.animated = false;\n          target.animatingX = false;\n          target.animatingY = false;\n        }, duration);\n      }\n    }\n  };\n}\n\nfunction repaint(target) {\n  return target.offsetWidth;\n}\n\nfunction calculateRealTime(animatingRect, fromRect, toRect, options) {\n  return Math.sqrt(Math.pow(fromRect.top - animatingRect.top, 2) + Math.pow(fromRect.left - animatingRect.left, 2)) / Math.sqrt(Math.pow(fromRect.top - toRect.top, 2) + Math.pow(fromRect.left - toRect.left, 2)) * options.animation;\n}\n\nvar plugins = [];\nvar defaults = {\n  initializeByDefault: true\n};\nvar PluginManager = {\n  mount: function mount(plugin) {\n    // Set default static properties\n    for (var option in defaults) {\n      if (defaults.hasOwnProperty(option) && !(option in plugin)) {\n        plugin[option] = defaults[option];\n      }\n    }\n\n    plugins.push(plugin);\n  },\n  pluginEvent: function pluginEvent(eventName, sortable, evt) {\n    var _this = this;\n\n    this.eventCanceled = false;\n\n    evt.cancel = function () {\n      _this.eventCanceled = true;\n    };\n\n    var eventNameGlobal = eventName + 'Global';\n    plugins.forEach(function (plugin) {\n      if (!sortable[plugin.pluginName]) return; // Fire global events if it exists in this sortable\n\n      if (sortable[plugin.pluginName][eventNameGlobal]) {\n        sortable[plugin.pluginName][eventNameGlobal](_objectSpread({\n          sortable: sortable\n        }, evt));\n      } // Only fire plugin event if plugin is enabled in this sortable,\n      // and plugin has event defined\n\n\n      if (sortable.options[plugin.pluginName] && sortable[plugin.pluginName][eventName]) {\n        sortable[plugin.pluginName][eventName](_objectSpread({\n          sortable: sortable\n        }, evt));\n      }\n    });\n  },\n  initializePlugins: function initializePlugins(sortable, el, defaults, options) {\n    plugins.forEach(function (plugin) {\n      var pluginName = plugin.pluginName;\n      if (!sortable.options[pluginName] && !plugin.initializeByDefault) return;\n      var initialized = new plugin(sortable, el, sortable.options);\n      initialized.sortable = sortable;\n      initialized.options = sortable.options;\n      sortable[pluginName] = initialized; // Add default options from plugin\n\n      _extends(defaults, initialized.defaults);\n    });\n\n    for (var option in sortable.options) {\n      if (!sortable.options.hasOwnProperty(option)) continue;\n      var modified = this.modifyOption(sortable, option, sortable.options[option]);\n\n      if (typeof modified !== 'undefined') {\n        sortable.options[option] = modified;\n      }\n    }\n  },\n  getEventProperties: function getEventProperties(name, sortable) {\n    var eventProperties = {};\n    plugins.forEach(function (plugin) {\n      if (typeof plugin.eventProperties !== 'function') return;\n\n      _extends(eventProperties, plugin.eventProperties.call(sortable[plugin.pluginName], name));\n    });\n    return eventProperties;\n  },\n  modifyOption: function modifyOption(sortable, name, value) {\n    var modifiedValue;\n    plugins.forEach(function (plugin) {\n      // Plugin must exist on the Sortable\n      if (!sortable[plugin.pluginName]) return; // If static option listener exists for this option, call in the context of the Sortable's instance of this plugin\n\n      if (plugin.optionListeners && typeof plugin.optionListeners[name] === 'function') {\n        modifiedValue = plugin.optionListeners[name].call(sortable[plugin.pluginName], value);\n      }\n    });\n    return modifiedValue;\n  }\n};\n\nfunction dispatchEvent(_ref) {\n  var sortable = _ref.sortable,\n      rootEl = _ref.rootEl,\n      name = _ref.name,\n      targetEl = _ref.targetEl,\n      cloneEl = _ref.cloneEl,\n      toEl = _ref.toEl,\n      fromEl = _ref.fromEl,\n      oldIndex = _ref.oldIndex,\n      newIndex = _ref.newIndex,\n      oldDraggableIndex = _ref.oldDraggableIndex,\n      newDraggableIndex = _ref.newDraggableIndex,\n      originalEvent = _ref.originalEvent,\n      putSortable = _ref.putSortable,\n      extraEventProperties = _ref.extraEventProperties;\n  sortable = sortable || rootEl && rootEl[expando];\n  if (!sortable) return;\n  var evt,\n      options = sortable.options,\n      onName = 'on' + name.charAt(0).toUpperCase() + name.substr(1); // Support for new CustomEvent feature\n\n  if (window.CustomEvent && !IE11OrLess && !Edge) {\n    evt = new CustomEvent(name, {\n      bubbles: true,\n      cancelable: true\n    });\n  } else {\n    evt = document.createEvent('Event');\n    evt.initEvent(name, true, true);\n  }\n\n  evt.to = toEl || rootEl;\n  evt.from = fromEl || rootEl;\n  evt.item = targetEl || rootEl;\n  evt.clone = cloneEl;\n  evt.oldIndex = oldIndex;\n  evt.newIndex = newIndex;\n  evt.oldDraggableIndex = oldDraggableIndex;\n  evt.newDraggableIndex = newDraggableIndex;\n  evt.originalEvent = originalEvent;\n  evt.pullMode = putSortable ? putSortable.lastPutMode : undefined;\n\n  var allEventProperties = _objectSpread({}, extraEventProperties, PluginManager.getEventProperties(name, sortable));\n\n  for (var option in allEventProperties) {\n    evt[option] = allEventProperties[option];\n  }\n\n  if (rootEl) {\n    rootEl.dispatchEvent(evt);\n  }\n\n  if (options[onName]) {\n    options[onName].call(sortable, evt);\n  }\n}\n\nvar pluginEvent = function pluginEvent(eventName, sortable) {\n  var _ref = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {},\n      originalEvent = _ref.evt,\n      data = _objectWithoutProperties(_ref, [\"evt\"]);\n\n  PluginManager.pluginEvent.bind(Sortable)(eventName, sortable, _objectSpread({\n    dragEl: dragEl,\n    parentEl: parentEl,\n    ghostEl: ghostEl,\n    rootEl: rootEl,\n    nextEl: nextEl,\n    lastDownEl: lastDownEl,\n    cloneEl: cloneEl,\n    cloneHidden: cloneHidden,\n    dragStarted: moved,\n    putSortable: putSortable,\n    activeSortable: Sortable.active,\n    originalEvent: originalEvent,\n    oldIndex: oldIndex,\n    oldDraggableIndex: oldDraggableIndex,\n    newIndex: newIndex,\n    newDraggableIndex: newDraggableIndex,\n    hideGhostForTarget: _hideGhostForTarget,\n    unhideGhostForTarget: _unhideGhostForTarget,\n    cloneNowHidden: function cloneNowHidden() {\n      cloneHidden = true;\n    },\n    cloneNowShown: function cloneNowShown() {\n      cloneHidden = false;\n    },\n    dispatchSortableEvent: function dispatchSortableEvent(name) {\n      _dispatchEvent({\n        sortable: sortable,\n        name: name,\n        originalEvent: originalEvent\n      });\n    }\n  }, data));\n};\n\nfunction _dispatchEvent(info) {\n  dispatchEvent(_objectSpread({\n    putSortable: putSortable,\n    cloneEl: cloneEl,\n    targetEl: dragEl,\n    rootEl: rootEl,\n    oldIndex: oldIndex,\n    oldDraggableIndex: oldDraggableIndex,\n    newIndex: newIndex,\n    newDraggableIndex: newDraggableIndex\n  }, info));\n}\n\nvar dragEl,\n    parentEl,\n    ghostEl,\n    rootEl,\n    nextEl,\n    lastDownEl,\n    cloneEl,\n    cloneHidden,\n    oldIndex,\n    newIndex,\n    oldDraggableIndex,\n    newDraggableIndex,\n    activeGroup,\n    putSortable,\n    awaitingDragStarted = false,\n    ignoreNextClick = false,\n    sortables = [],\n    tapEvt,\n    touchEvt,\n    lastDx,\n    lastDy,\n    tapDistanceLeft,\n    tapDistanceTop,\n    moved,\n    lastTarget,\n    lastDirection,\n    pastFirstInvertThresh = false,\n    isCircumstantialInvert = false,\n    targetMoveDistance,\n    // For positioning ghost absolutely\nghostRelativeParent,\n    ghostRelativeParentInitialScroll = [],\n    // (left, top)\n_silent = false,\n    savedInputChecked = [];\n/** @const */\n\nvar documentExists = typeof document !== 'undefined',\n    PositionGhostAbsolutely = IOS,\n    CSSFloatProperty = Edge || IE11OrLess ? 'cssFloat' : 'float',\n    // This will not pass for IE9, because IE9 DnD only works on anchors\nsupportDraggable = documentExists && !ChromeForAndroid && !IOS && 'draggable' in document.createElement('div'),\n    supportCssPointerEvents = function () {\n  if (!documentExists) return; // false when <= IE11\n\n  if (IE11OrLess) {\n    return false;\n  }\n\n  var el = document.createElement('x');\n  el.style.cssText = 'pointer-events:auto';\n  return el.style.pointerEvents === 'auto';\n}(),\n    _detectDirection = function _detectDirection(el, options) {\n  var elCSS = css(el),\n      elWidth = parseInt(elCSS.width) - parseInt(elCSS.paddingLeft) - parseInt(elCSS.paddingRight) - parseInt(elCSS.borderLeftWidth) - parseInt(elCSS.borderRightWidth),\n      child1 = getChild(el, 0, options),\n      child2 = getChild(el, 1, options),\n      firstChildCSS = child1 && css(child1),\n      secondChildCSS = child2 && css(child2),\n      firstChildWidth = firstChildCSS && parseInt(firstChildCSS.marginLeft) + parseInt(firstChildCSS.marginRight) + getRect(child1).width,\n      secondChildWidth = secondChildCSS && parseInt(secondChildCSS.marginLeft) + parseInt(secondChildCSS.marginRight) + getRect(child2).width;\n\n  if (elCSS.display === 'flex') {\n    return elCSS.flexDirection === 'column' || elCSS.flexDirection === 'column-reverse' ? 'vertical' : 'horizontal';\n  }\n\n  if (elCSS.display === 'grid') {\n    return elCSS.gridTemplateColumns.split(' ').length <= 1 ? 'vertical' : 'horizontal';\n  }\n\n  if (child1 && firstChildCSS[\"float\"] && firstChildCSS[\"float\"] !== 'none') {\n    var touchingSideChild2 = firstChildCSS[\"float\"] === 'left' ? 'left' : 'right';\n    return child2 && (secondChildCSS.clear === 'both' || secondChildCSS.clear === touchingSideChild2) ? 'vertical' : 'horizontal';\n  }\n\n  return child1 && (firstChildCSS.display === 'block' || firstChildCSS.display === 'flex' || firstChildCSS.display === 'table' || firstChildCSS.display === 'grid' || firstChildWidth >= elWidth && elCSS[CSSFloatProperty] === 'none' || child2 && elCSS[CSSFloatProperty] === 'none' && firstChildWidth + secondChildWidth > elWidth) ? 'vertical' : 'horizontal';\n},\n    _dragElInRowColumn = function _dragElInRowColumn(dragRect, targetRect, vertical) {\n  var dragElS1Opp = vertical ? dragRect.left : dragRect.top,\n      dragElS2Opp = vertical ? dragRect.right : dragRect.bottom,\n      dragElOppLength = vertical ? dragRect.width : dragRect.height,\n      targetS1Opp = vertical ? targetRect.left : targetRect.top,\n      targetS2Opp = vertical ? targetRect.right : targetRect.bottom,\n      targetOppLength = vertical ? targetRect.width : targetRect.height;\n  return dragElS1Opp === targetS1Opp || dragElS2Opp === targetS2Opp || dragElS1Opp + dragElOppLength / 2 === targetS1Opp + targetOppLength / 2;\n},\n\n/**\n * Detects first nearest empty sortable to X and Y position using emptyInsertThreshold.\n * @param  {Number} x      X position\n * @param  {Number} y      Y position\n * @return {HTMLElement}   Element of the first found nearest Sortable\n */\n_detectNearestEmptySortable = function _detectNearestEmptySortable(x, y) {\n  var ret;\n  sortables.some(function (sortable) {\n    if (lastChild(sortable)) return;\n    var rect = getRect(sortable),\n        threshold = sortable[expando].options.emptyInsertThreshold,\n        insideHorizontally = x >= rect.left - threshold && x <= rect.right + threshold,\n        insideVertically = y >= rect.top - threshold && y <= rect.bottom + threshold;\n\n    if (threshold && insideHorizontally && insideVertically) {\n      return ret = sortable;\n    }\n  });\n  return ret;\n},\n    _prepareGroup = function _prepareGroup(options) {\n  function toFn(value, pull) {\n    return function (to, from, dragEl, evt) {\n      var sameGroup = to.options.group.name && from.options.group.name && to.options.group.name === from.options.group.name;\n\n      if (value == null && (pull || sameGroup)) {\n        // Default pull value\n        // Default pull and put value if same group\n        return true;\n      } else if (value == null || value === false) {\n        return false;\n      } else if (pull && value === 'clone') {\n        return value;\n      } else if (typeof value === 'function') {\n        return toFn(value(to, from, dragEl, evt), pull)(to, from, dragEl, evt);\n      } else {\n        var otherGroup = (pull ? to : from).options.group.name;\n        return value === true || typeof value === 'string' && value === otherGroup || value.join && value.indexOf(otherGroup) > -1;\n      }\n    };\n  }\n\n  var group = {};\n  var originalGroup = options.group;\n\n  if (!originalGroup || _typeof(originalGroup) != 'object') {\n    originalGroup = {\n      name: originalGroup\n    };\n  }\n\n  group.name = originalGroup.name;\n  group.checkPull = toFn(originalGroup.pull, true);\n  group.checkPut = toFn(originalGroup.put);\n  group.revertClone = originalGroup.revertClone;\n  options.group = group;\n},\n    _hideGhostForTarget = function _hideGhostForTarget() {\n  if (!supportCssPointerEvents && ghostEl) {\n    css(ghostEl, 'display', 'none');\n  }\n},\n    _unhideGhostForTarget = function _unhideGhostForTarget() {\n  if (!supportCssPointerEvents && ghostEl) {\n    css(ghostEl, 'display', '');\n  }\n}; // #1184 fix - Prevent click event on fallback if dragged but item not changed position\n\n\nif (documentExists) {\n  document.addEventListener('click', function (evt) {\n    if (ignoreNextClick) {\n      evt.preventDefault();\n      evt.stopPropagation && evt.stopPropagation();\n      evt.stopImmediatePropagation && evt.stopImmediatePropagation();\n      ignoreNextClick = false;\n      return false;\n    }\n  }, true);\n}\n\nvar nearestEmptyInsertDetectEvent = function nearestEmptyInsertDetectEvent(evt) {\n  if (dragEl) {\n    evt = evt.touches ? evt.touches[0] : evt;\n\n    var nearest = _detectNearestEmptySortable(evt.clientX, evt.clientY);\n\n    if (nearest) {\n      // Create imitation event\n      var event = {};\n\n      for (var i in evt) {\n        if (evt.hasOwnProperty(i)) {\n          event[i] = evt[i];\n        }\n      }\n\n      event.target = event.rootEl = nearest;\n      event.preventDefault = void 0;\n      event.stopPropagation = void 0;\n\n      nearest[expando]._onDragOver(event);\n    }\n  }\n};\n\nvar _checkOutsideTargetEl = function _checkOutsideTargetEl(evt) {\n  if (dragEl) {\n    dragEl.parentNode[expando]._isOutsideThisEl(evt.target);\n  }\n};\n/**\n * @class  Sortable\n * @param  {HTMLElement}  el\n * @param  {Object}       [options]\n */\n\n\nfunction Sortable(el, options) {\n  if (!(el && el.nodeType && el.nodeType === 1)) {\n    throw \"Sortable: `el` must be an HTMLElement, not \".concat({}.toString.call(el));\n  }\n\n  this.el = el; // root element\n\n  this.options = options = _extends({}, options); // Export instance\n\n  el[expando] = this;\n  var defaults = {\n    group: null,\n    sort: true,\n    disabled: false,\n    store: null,\n    handle: null,\n    draggable: /^[uo]l$/i.test(el.nodeName) ? '>li' : '>*',\n    swapThreshold: 1,\n    // percentage; 0 <= x <= 1\n    invertSwap: false,\n    // invert always\n    invertedSwapThreshold: null,\n    // will be set to same as swapThreshold if default\n    removeCloneOnHide: true,\n    direction: function direction() {\n      return _detectDirection(el, this.options);\n    },\n    ghostClass: 'sortable-ghost',\n    chosenClass: 'sortable-chosen',\n    dragClass: 'sortable-drag',\n    ignore: 'a, img',\n    filter: null,\n    preventOnFilter: true,\n    animation: 0,\n    easing: null,\n    setData: function setData(dataTransfer, dragEl) {\n      dataTransfer.setData('Text', dragEl.textContent);\n    },\n    dropBubble: false,\n    dragoverBubble: false,\n    dataIdAttr: 'data-id',\n    delay: 0,\n    delayOnTouchOnly: false,\n    touchStartThreshold: (Number.parseInt ? Number : window).parseInt(window.devicePixelRatio, 10) || 1,\n    forceFallback: false,\n    fallbackClass: 'sortable-fallback',\n    fallbackOnBody: false,\n    fallbackTolerance: 0,\n    fallbackOffset: {\n      x: 0,\n      y: 0\n    },\n    supportPointer: Sortable.supportPointer !== false && 'PointerEvent' in window,\n    emptyInsertThreshold: 5\n  };\n  PluginManager.initializePlugins(this, el, defaults); // Set default options\n\n  for (var name in defaults) {\n    !(name in options) && (options[name] = defaults[name]);\n  }\n\n  _prepareGroup(options); // Bind all private methods\n\n\n  for (var fn in this) {\n    if (fn.charAt(0) === '_' && typeof this[fn] === 'function') {\n      this[fn] = this[fn].bind(this);\n    }\n  } // Setup drag mode\n\n\n  this.nativeDraggable = options.forceFallback ? false : supportDraggable;\n\n  if (this.nativeDraggable) {\n    // Touch start threshold cannot be greater than the native dragstart threshold\n    this.options.touchStartThreshold = 1;\n  } // Bind events\n\n\n  if (options.supportPointer) {\n    on(el, 'pointerdown', this._onTapStart);\n  } else {\n    on(el, 'mousedown', this._onTapStart);\n    on(el, 'touchstart', this._onTapStart);\n  }\n\n  if (this.nativeDraggable) {\n    on(el, 'dragover', this);\n    on(el, 'dragenter', this);\n  }\n\n  sortables.push(this.el); // Restore sorting\n\n  options.store && options.store.get && this.sort(options.store.get(this) || []); // Add animation state manager\n\n  _extends(this, AnimationStateManager());\n}\n\nSortable.prototype =\n/** @lends Sortable.prototype */\n{\n  constructor: Sortable,\n  _isOutsideThisEl: function _isOutsideThisEl(target) {\n    if (!this.el.contains(target) && target !== this.el) {\n      lastTarget = null;\n    }\n  },\n  _getDirection: function _getDirection(evt, target) {\n    return typeof this.options.direction === 'function' ? this.options.direction.call(this, evt, target, dragEl) : this.options.direction;\n  },\n  _onTapStart: function _onTapStart(\n  /** Event|TouchEvent */\n  evt) {\n    if (!evt.cancelable) return;\n\n    var _this = this,\n        el = this.el,\n        options = this.options,\n        preventOnFilter = options.preventOnFilter,\n        type = evt.type,\n        touch = evt.touches && evt.touches[0] || evt.pointerType && evt.pointerType === 'touch' && evt,\n        target = (touch || evt).target,\n        originalTarget = evt.target.shadowRoot && (evt.path && evt.path[0] || evt.composedPath && evt.composedPath()[0]) || target,\n        filter = options.filter;\n\n    _saveInputCheckedState(el); // Don't trigger start event when an element is been dragged, otherwise the evt.oldindex always wrong when set option.group.\n\n\n    if (dragEl) {\n      return;\n    }\n\n    if (/mousedown|pointerdown/.test(type) && evt.button !== 0 || options.disabled) {\n      return; // only left button and enabled\n    } // cancel dnd if original target is content editable\n\n\n    if (originalTarget.isContentEditable) {\n      return;\n    }\n\n    target = closest(target, options.draggable, el, false);\n\n    if (target && target.animated) {\n      return;\n    }\n\n    if (lastDownEl === target) {\n      // Ignoring duplicate `down`\n      return;\n    } // Get the index of the dragged element within its parent\n\n\n    oldIndex = index(target);\n    oldDraggableIndex = index(target, options.draggable); // Check filter\n\n    if (typeof filter === 'function') {\n      if (filter.call(this, evt, target, this)) {\n        _dispatchEvent({\n          sortable: _this,\n          rootEl: originalTarget,\n          name: 'filter',\n          targetEl: target,\n          toEl: el,\n          fromEl: el\n        });\n\n        pluginEvent('filter', _this, {\n          evt: evt\n        });\n        preventOnFilter && evt.cancelable && evt.preventDefault();\n        return; // cancel dnd\n      }\n    } else if (filter) {\n      filter = filter.split(',').some(function (criteria) {\n        criteria = closest(originalTarget, criteria.trim(), el, false);\n\n        if (criteria) {\n          _dispatchEvent({\n            sortable: _this,\n            rootEl: criteria,\n            name: 'filter',\n            targetEl: target,\n            fromEl: el,\n            toEl: el\n          });\n\n          pluginEvent('filter', _this, {\n            evt: evt\n          });\n          return true;\n        }\n      });\n\n      if (filter) {\n        preventOnFilter && evt.cancelable && evt.preventDefault();\n        return; // cancel dnd\n      }\n    }\n\n    if (options.handle && !closest(originalTarget, options.handle, el, false)) {\n      return;\n    } // Prepare `dragstart`\n\n\n    this._prepareDragStart(evt, touch, target);\n  },\n  _prepareDragStart: function _prepareDragStart(\n  /** Event */\n  evt,\n  /** Touch */\n  touch,\n  /** HTMLElement */\n  target) {\n    var _this = this,\n        el = _this.el,\n        options = _this.options,\n        ownerDocument = el.ownerDocument,\n        dragStartFn;\n\n    if (target && !dragEl && target.parentNode === el) {\n      var dragRect = getRect(target);\n      rootEl = el;\n      dragEl = target;\n      parentEl = dragEl.parentNode;\n      nextEl = dragEl.nextSibling;\n      lastDownEl = target;\n      activeGroup = options.group;\n      Sortable.dragged = dragEl;\n      tapEvt = {\n        target: dragEl,\n        clientX: (touch || evt).clientX,\n        clientY: (touch || evt).clientY\n      };\n      tapDistanceLeft = tapEvt.clientX - dragRect.left;\n      tapDistanceTop = tapEvt.clientY - dragRect.top;\n      this._lastX = (touch || evt).clientX;\n      this._lastY = (touch || evt).clientY;\n      dragEl.style['will-change'] = 'all';\n\n      dragStartFn = function dragStartFn() {\n        pluginEvent('delayEnded', _this, {\n          evt: evt\n        });\n\n        if (Sortable.eventCanceled) {\n          _this._onDrop();\n\n          return;\n        } // Delayed drag has been triggered\n        // we can re-enable the events: touchmove/mousemove\n\n\n        _this._disableDelayedDragEvents();\n\n        if (!FireFox && _this.nativeDraggable) {\n          dragEl.draggable = true;\n        } // Bind the events: dragstart/dragend\n\n\n        _this._triggerDragStart(evt, touch); // Drag start event\n\n\n        _dispatchEvent({\n          sortable: _this,\n          name: 'choose',\n          originalEvent: evt\n        }); // Chosen item\n\n\n        toggleClass(dragEl, options.chosenClass, true);\n      }; // Disable \"draggable\"\n\n\n      options.ignore.split(',').forEach(function (criteria) {\n        find(dragEl, criteria.trim(), _disableDraggable);\n      });\n      on(ownerDocument, 'dragover', nearestEmptyInsertDetectEvent);\n      on(ownerDocument, 'mousemove', nearestEmptyInsertDetectEvent);\n      on(ownerDocument, 'touchmove', nearestEmptyInsertDetectEvent);\n      on(ownerDocument, 'mouseup', _this._onDrop);\n      on(ownerDocument, 'touchend', _this._onDrop);\n      on(ownerDocument, 'touchcancel', _this._onDrop); // Make dragEl draggable (must be before delay for FireFox)\n\n      if (FireFox && this.nativeDraggable) {\n        this.options.touchStartThreshold = 4;\n        dragEl.draggable = true;\n      }\n\n      pluginEvent('delayStart', this, {\n        evt: evt\n      }); // Delay is impossible for native DnD in Edge or IE\n\n      if (options.delay && (!options.delayOnTouchOnly || touch) && (!this.nativeDraggable || !(Edge || IE11OrLess))) {\n        if (Sortable.eventCanceled) {\n          this._onDrop();\n\n          return;\n        } // If the user moves the pointer or let go the click or touch\n        // before the delay has been reached:\n        // disable the delayed drag\n\n\n        on(ownerDocument, 'mouseup', _this._disableDelayedDrag);\n        on(ownerDocument, 'touchend', _this._disableDelayedDrag);\n        on(ownerDocument, 'touchcancel', _this._disableDelayedDrag);\n        on(ownerDocument, 'mousemove', _this._delayedDragTouchMoveHandler);\n        on(ownerDocument, 'touchmove', _this._delayedDragTouchMoveHandler);\n        options.supportPointer && on(ownerDocument, 'pointermove', _this._delayedDragTouchMoveHandler);\n        _this._dragStartTimer = setTimeout(dragStartFn, options.delay);\n      } else {\n        dragStartFn();\n      }\n    }\n  },\n  _delayedDragTouchMoveHandler: function _delayedDragTouchMoveHandler(\n  /** TouchEvent|PointerEvent **/\n  e) {\n    var touch = e.touches ? e.touches[0] : e;\n\n    if (Math.max(Math.abs(touch.clientX - this._lastX), Math.abs(touch.clientY - this._lastY)) >= Math.floor(this.options.touchStartThreshold / (this.nativeDraggable && window.devicePixelRatio || 1))) {\n      this._disableDelayedDrag();\n    }\n  },\n  _disableDelayedDrag: function _disableDelayedDrag() {\n    dragEl && _disableDraggable(dragEl);\n    clearTimeout(this._dragStartTimer);\n\n    this._disableDelayedDragEvents();\n  },\n  _disableDelayedDragEvents: function _disableDelayedDragEvents() {\n    var ownerDocument = this.el.ownerDocument;\n    off(ownerDocument, 'mouseup', this._disableDelayedDrag);\n    off(ownerDocument, 'touchend', this._disableDelayedDrag);\n    off(ownerDocument, 'touchcancel', this._disableDelayedDrag);\n    off(ownerDocument, 'mousemove', this._delayedDragTouchMoveHandler);\n    off(ownerDocument, 'touchmove', this._delayedDragTouchMoveHandler);\n    off(ownerDocument, 'pointermove', this._delayedDragTouchMoveHandler);\n  },\n  _triggerDragStart: function _triggerDragStart(\n  /** Event */\n  evt,\n  /** Touch */\n  touch) {\n    touch = touch || evt.pointerType == 'touch' && evt;\n\n    if (!this.nativeDraggable || touch) {\n      if (this.options.supportPointer) {\n        on(document, 'pointermove', this._onTouchMove);\n      } else if (touch) {\n        on(document, 'touchmove', this._onTouchMove);\n      } else {\n        on(document, 'mousemove', this._onTouchMove);\n      }\n    } else {\n      on(dragEl, 'dragend', this);\n      on(rootEl, 'dragstart', this._onDragStart);\n    }\n\n    try {\n      if (document.selection) {\n        // Timeout neccessary for IE9\n        _nextTick(function () {\n          document.selection.empty();\n        });\n      } else {\n        window.getSelection().removeAllRanges();\n      }\n    } catch (err) {}\n  },\n  _dragStarted: function _dragStarted(fallback, evt) {\n\n    awaitingDragStarted = false;\n\n    if (rootEl && dragEl) {\n      pluginEvent('dragStarted', this, {\n        evt: evt\n      });\n\n      if (this.nativeDraggable) {\n        on(document, 'dragover', _checkOutsideTargetEl);\n      }\n\n      var options = this.options; // Apply effect\n\n      !fallback && toggleClass(dragEl, options.dragClass, false);\n      toggleClass(dragEl, options.ghostClass, true);\n      Sortable.active = this;\n      fallback && this._appendGhost(); // Drag start event\n\n      _dispatchEvent({\n        sortable: this,\n        name: 'start',\n        originalEvent: evt\n      });\n    } else {\n      this._nulling();\n    }\n  },\n  _emulateDragOver: function _emulateDragOver() {\n    if (touchEvt) {\n      this._lastX = touchEvt.clientX;\n      this._lastY = touchEvt.clientY;\n\n      _hideGhostForTarget();\n\n      var target = document.elementFromPoint(touchEvt.clientX, touchEvt.clientY);\n      var parent = target;\n\n      while (target && target.shadowRoot) {\n        target = target.shadowRoot.elementFromPoint(touchEvt.clientX, touchEvt.clientY);\n        if (target === parent) break;\n        parent = target;\n      }\n\n      dragEl.parentNode[expando]._isOutsideThisEl(target);\n\n      if (parent) {\n        do {\n          if (parent[expando]) {\n            var inserted = void 0;\n            inserted = parent[expando]._onDragOver({\n              clientX: touchEvt.clientX,\n              clientY: touchEvt.clientY,\n              target: target,\n              rootEl: parent\n            });\n\n            if (inserted && !this.options.dragoverBubble) {\n              break;\n            }\n          }\n\n          target = parent; // store last element\n        }\n        /* jshint boss:true */\n        while (parent = parent.parentNode);\n      }\n\n      _unhideGhostForTarget();\n    }\n  },\n  _onTouchMove: function _onTouchMove(\n  /**TouchEvent*/\n  evt) {\n    if (tapEvt) {\n      var options = this.options,\n          fallbackTolerance = options.fallbackTolerance,\n          fallbackOffset = options.fallbackOffset,\n          touch = evt.touches ? evt.touches[0] : evt,\n          ghostMatrix = ghostEl && matrix(ghostEl, true),\n          scaleX = ghostEl && ghostMatrix && ghostMatrix.a,\n          scaleY = ghostEl && ghostMatrix && ghostMatrix.d,\n          relativeScrollOffset = PositionGhostAbsolutely && ghostRelativeParent && getRelativeScrollOffset(ghostRelativeParent),\n          dx = (touch.clientX - tapEvt.clientX + fallbackOffset.x) / (scaleX || 1) + (relativeScrollOffset ? relativeScrollOffset[0] - ghostRelativeParentInitialScroll[0] : 0) / (scaleX || 1),\n          dy = (touch.clientY - tapEvt.clientY + fallbackOffset.y) / (scaleY || 1) + (relativeScrollOffset ? relativeScrollOffset[1] - ghostRelativeParentInitialScroll[1] : 0) / (scaleY || 1); // only set the status to dragging, when we are actually dragging\n\n      if (!Sortable.active && !awaitingDragStarted) {\n        if (fallbackTolerance && Math.max(Math.abs(touch.clientX - this._lastX), Math.abs(touch.clientY - this._lastY)) < fallbackTolerance) {\n          return;\n        }\n\n        this._onDragStart(evt, true);\n      }\n\n      if (ghostEl) {\n        if (ghostMatrix) {\n          ghostMatrix.e += dx - (lastDx || 0);\n          ghostMatrix.f += dy - (lastDy || 0);\n        } else {\n          ghostMatrix = {\n            a: 1,\n            b: 0,\n            c: 0,\n            d: 1,\n            e: dx,\n            f: dy\n          };\n        }\n\n        var cssMatrix = \"matrix(\".concat(ghostMatrix.a, \",\").concat(ghostMatrix.b, \",\").concat(ghostMatrix.c, \",\").concat(ghostMatrix.d, \",\").concat(ghostMatrix.e, \",\").concat(ghostMatrix.f, \")\");\n        css(ghostEl, 'webkitTransform', cssMatrix);\n        css(ghostEl, 'mozTransform', cssMatrix);\n        css(ghostEl, 'msTransform', cssMatrix);\n        css(ghostEl, 'transform', cssMatrix);\n        lastDx = dx;\n        lastDy = dy;\n        touchEvt = touch;\n      }\n\n      evt.cancelable && evt.preventDefault();\n    }\n  },\n  _appendGhost: function _appendGhost() {\n    // Bug if using scale(): https://stackoverflow.com/questions/2637058\n    // Not being adjusted for\n    if (!ghostEl) {\n      var container = this.options.fallbackOnBody ? document.body : rootEl,\n          rect = getRect(dragEl, true, PositionGhostAbsolutely, true, container),\n          options = this.options; // Position absolutely\n\n      if (PositionGhostAbsolutely) {\n        // Get relatively positioned parent\n        ghostRelativeParent = container;\n\n        while (css(ghostRelativeParent, 'position') === 'static' && css(ghostRelativeParent, 'transform') === 'none' && ghostRelativeParent !== document) {\n          ghostRelativeParent = ghostRelativeParent.parentNode;\n        }\n\n        if (ghostRelativeParent !== document.body && ghostRelativeParent !== document.documentElement) {\n          if (ghostRelativeParent === document) ghostRelativeParent = getWindowScrollingElement();\n          rect.top += ghostRelativeParent.scrollTop;\n          rect.left += ghostRelativeParent.scrollLeft;\n        } else {\n          ghostRelativeParent = getWindowScrollingElement();\n        }\n\n        ghostRelativeParentInitialScroll = getRelativeScrollOffset(ghostRelativeParent);\n      }\n\n      ghostEl = dragEl.cloneNode(true);\n      toggleClass(ghostEl, options.ghostClass, false);\n      toggleClass(ghostEl, options.fallbackClass, true);\n      toggleClass(ghostEl, options.dragClass, true);\n      css(ghostEl, 'transition', '');\n      css(ghostEl, 'transform', '');\n      css(ghostEl, 'box-sizing', 'border-box');\n      css(ghostEl, 'margin', 0);\n      css(ghostEl, 'top', rect.top);\n      css(ghostEl, 'left', rect.left);\n      css(ghostEl, 'width', rect.width);\n      css(ghostEl, 'height', rect.height);\n      css(ghostEl, 'opacity', '0.8');\n      css(ghostEl, 'position', PositionGhostAbsolutely ? 'absolute' : 'fixed');\n      css(ghostEl, 'zIndex', '100000');\n      css(ghostEl, 'pointerEvents', 'none');\n      Sortable.ghost = ghostEl;\n      container.appendChild(ghostEl); // Set transform-origin\n\n      css(ghostEl, 'transform-origin', tapDistanceLeft / parseInt(ghostEl.style.width) * 100 + '% ' + tapDistanceTop / parseInt(ghostEl.style.height) * 100 + '%');\n    }\n  },\n  _onDragStart: function _onDragStart(\n  /**Event*/\n  evt,\n  /**boolean*/\n  fallback) {\n    var _this = this;\n\n    var dataTransfer = evt.dataTransfer;\n    var options = _this.options;\n    pluginEvent('dragStart', this, {\n      evt: evt\n    });\n\n    if (Sortable.eventCanceled) {\n      this._onDrop();\n\n      return;\n    }\n\n    pluginEvent('setupClone', this);\n\n    if (!Sortable.eventCanceled) {\n      cloneEl = clone(dragEl);\n      cloneEl.draggable = false;\n      cloneEl.style['will-change'] = '';\n\n      this._hideClone();\n\n      toggleClass(cloneEl, this.options.chosenClass, false);\n      Sortable.clone = cloneEl;\n    } // #1143: IFrame support workaround\n\n\n    _this.cloneId = _nextTick(function () {\n      pluginEvent('clone', _this);\n      if (Sortable.eventCanceled) return;\n\n      if (!_this.options.removeCloneOnHide) {\n        rootEl.insertBefore(cloneEl, dragEl);\n      }\n\n      _this._hideClone();\n\n      _dispatchEvent({\n        sortable: _this,\n        name: 'clone'\n      });\n    });\n    !fallback && toggleClass(dragEl, options.dragClass, true); // Set proper drop events\n\n    if (fallback) {\n      ignoreNextClick = true;\n      _this._loopId = setInterval(_this._emulateDragOver, 50);\n    } else {\n      // Undo what was set in _prepareDragStart before drag started\n      off(document, 'mouseup', _this._onDrop);\n      off(document, 'touchend', _this._onDrop);\n      off(document, 'touchcancel', _this._onDrop);\n\n      if (dataTransfer) {\n        dataTransfer.effectAllowed = 'move';\n        options.setData && options.setData.call(_this, dataTransfer, dragEl);\n      }\n\n      on(document, 'drop', _this); // #1276 fix:\n\n      css(dragEl, 'transform', 'translateZ(0)');\n    }\n\n    awaitingDragStarted = true;\n    _this._dragStartId = _nextTick(_this._dragStarted.bind(_this, fallback, evt));\n    on(document, 'selectstart', _this);\n    moved = true;\n\n    if (Safari) {\n      css(document.body, 'user-select', 'none');\n    }\n  },\n  // Returns true - if no further action is needed (either inserted or another condition)\n  _onDragOver: function _onDragOver(\n  /**Event*/\n  evt) {\n    var el = this.el,\n        target = evt.target,\n        dragRect,\n        targetRect,\n        revert,\n        options = this.options,\n        group = options.group,\n        activeSortable = Sortable.active,\n        isOwner = activeGroup === group,\n        canSort = options.sort,\n        fromSortable = putSortable || activeSortable,\n        vertical,\n        _this = this,\n        completedFired = false;\n\n    if (_silent) return;\n\n    function dragOverEvent(name, extra) {\n      pluginEvent(name, _this, _objectSpread({\n        evt: evt,\n        isOwner: isOwner,\n        axis: vertical ? 'vertical' : 'horizontal',\n        revert: revert,\n        dragRect: dragRect,\n        targetRect: targetRect,\n        canSort: canSort,\n        fromSortable: fromSortable,\n        target: target,\n        completed: completed,\n        onMove: function onMove(target, after) {\n          return _onMove(rootEl, el, dragEl, dragRect, target, getRect(target), evt, after);\n        },\n        changed: changed\n      }, extra));\n    } // Capture animation state\n\n\n    function capture() {\n      dragOverEvent('dragOverAnimationCapture');\n\n      _this.captureAnimationState();\n\n      if (_this !== fromSortable) {\n        fromSortable.captureAnimationState();\n      }\n    } // Return invocation when dragEl is inserted (or completed)\n\n\n    function completed(insertion) {\n      dragOverEvent('dragOverCompleted', {\n        insertion: insertion\n      });\n\n      if (insertion) {\n        // Clones must be hidden before folding animation to capture dragRectAbsolute properly\n        if (isOwner) {\n          activeSortable._hideClone();\n        } else {\n          activeSortable._showClone(_this);\n        }\n\n        if (_this !== fromSortable) {\n          // Set ghost class to new sortable's ghost class\n          toggleClass(dragEl, putSortable ? putSortable.options.ghostClass : activeSortable.options.ghostClass, false);\n          toggleClass(dragEl, options.ghostClass, true);\n        }\n\n        if (putSortable !== _this && _this !== Sortable.active) {\n          putSortable = _this;\n        } else if (_this === Sortable.active && putSortable) {\n          putSortable = null;\n        } // Animation\n\n\n        if (fromSortable === _this) {\n          _this._ignoreWhileAnimating = target;\n        }\n\n        _this.animateAll(function () {\n          dragOverEvent('dragOverAnimationComplete');\n          _this._ignoreWhileAnimating = null;\n        });\n\n        if (_this !== fromSortable) {\n          fromSortable.animateAll();\n          fromSortable._ignoreWhileAnimating = null;\n        }\n      } // Null lastTarget if it is not inside a previously swapped element\n\n\n      if (target === dragEl && !dragEl.animated || target === el && !target.animated) {\n        lastTarget = null;\n      } // no bubbling and not fallback\n\n\n      if (!options.dragoverBubble && !evt.rootEl && target !== document) {\n        dragEl.parentNode[expando]._isOutsideThisEl(evt.target); // Do not detect for empty insert if already inserted\n\n\n        !insertion && nearestEmptyInsertDetectEvent(evt);\n      }\n\n      !options.dragoverBubble && evt.stopPropagation && evt.stopPropagation();\n      return completedFired = true;\n    } // Call when dragEl has been inserted\n\n\n    function changed() {\n      newIndex = index(dragEl);\n      newDraggableIndex = index(dragEl, options.draggable);\n\n      _dispatchEvent({\n        sortable: _this,\n        name: 'change',\n        toEl: el,\n        newIndex: newIndex,\n        newDraggableIndex: newDraggableIndex,\n        originalEvent: evt\n      });\n    }\n\n    if (evt.preventDefault !== void 0) {\n      evt.cancelable && evt.preventDefault();\n    }\n\n    target = closest(target, options.draggable, el, true);\n    dragOverEvent('dragOver');\n    if (Sortable.eventCanceled) return completedFired;\n\n    if (dragEl.contains(evt.target) || target.animated && target.animatingX && target.animatingY || _this._ignoreWhileAnimating === target) {\n      return completed(false);\n    }\n\n    ignoreNextClick = false;\n\n    if (activeSortable && !options.disabled && (isOwner ? canSort || (revert = !rootEl.contains(dragEl)) // Reverting item into the original list\n    : putSortable === this || (this.lastPutMode = activeGroup.checkPull(this, activeSortable, dragEl, evt)) && group.checkPut(this, activeSortable, dragEl, evt))) {\n      vertical = this._getDirection(evt, target) === 'vertical';\n      dragRect = getRect(dragEl);\n      dragOverEvent('dragOverValid');\n      if (Sortable.eventCanceled) return completedFired;\n\n      if (revert) {\n        parentEl = rootEl; // actualization\n\n        capture();\n\n        this._hideClone();\n\n        dragOverEvent('revert');\n\n        if (!Sortable.eventCanceled) {\n          if (nextEl) {\n            rootEl.insertBefore(dragEl, nextEl);\n          } else {\n            rootEl.appendChild(dragEl);\n          }\n        }\n\n        return completed(true);\n      }\n\n      var elLastChild = lastChild(el, options.draggable);\n\n      if (!elLastChild || _ghostIsLast(evt, vertical, this) && !elLastChild.animated) {\n        // If already at end of list: Do not insert\n        if (elLastChild === dragEl) {\n          return completed(false);\n        } // assign target only if condition is true\n\n\n        if (elLastChild && el === evt.target) {\n          target = elLastChild;\n        }\n\n        if (target) {\n          targetRect = getRect(target);\n        }\n\n        if (_onMove(rootEl, el, dragEl, dragRect, target, targetRect, evt, !!target) !== false) {\n          capture();\n          el.appendChild(dragEl);\n          parentEl = el; // actualization\n\n          changed();\n          return completed(true);\n        }\n      } else if (target.parentNode === el) {\n        targetRect = getRect(target);\n        var direction = 0,\n            targetBeforeFirstSwap,\n            differentLevel = dragEl.parentNode !== el,\n            differentRowCol = !_dragElInRowColumn(dragEl.animated && dragEl.toRect || dragRect, target.animated && target.toRect || targetRect, vertical),\n            side1 = vertical ? 'top' : 'left',\n            scrolledPastTop = isScrolledPast(target, 'top', 'top') || isScrolledPast(dragEl, 'top', 'top'),\n            scrollBefore = scrolledPastTop ? scrolledPastTop.scrollTop : void 0;\n\n        if (lastTarget !== target) {\n          targetBeforeFirstSwap = targetRect[side1];\n          pastFirstInvertThresh = false;\n          isCircumstantialInvert = !differentRowCol && options.invertSwap || differentLevel;\n        }\n\n        direction = _getSwapDirection(evt, target, targetRect, vertical, differentRowCol ? 1 : options.swapThreshold, options.invertedSwapThreshold == null ? options.swapThreshold : options.invertedSwapThreshold, isCircumstantialInvert, lastTarget === target);\n        var sibling;\n\n        if (direction !== 0) {\n          // Check if target is beside dragEl in respective direction (ignoring hidden elements)\n          var dragIndex = index(dragEl);\n\n          do {\n            dragIndex -= direction;\n            sibling = parentEl.children[dragIndex];\n          } while (sibling && (css(sibling, 'display') === 'none' || sibling === ghostEl));\n        } // If dragEl is already beside target: Do not insert\n\n\n        if (direction === 0 || sibling === target) {\n          return completed(false);\n        }\n\n        lastTarget = target;\n        lastDirection = direction;\n        var nextSibling = target.nextElementSibling,\n            after = false;\n        after = direction === 1;\n\n        var moveVector = _onMove(rootEl, el, dragEl, dragRect, target, targetRect, evt, after);\n\n        if (moveVector !== false) {\n          if (moveVector === 1 || moveVector === -1) {\n            after = moveVector === 1;\n          }\n\n          _silent = true;\n          setTimeout(_unsilent, 30);\n          capture();\n\n          if (after && !nextSibling) {\n            el.appendChild(dragEl);\n          } else {\n            target.parentNode.insertBefore(dragEl, after ? nextSibling : target);\n          } // Undo chrome's scroll adjustment (has no effect on other browsers)\n\n\n          if (scrolledPastTop) {\n            scrollBy(scrolledPastTop, 0, scrollBefore - scrolledPastTop.scrollTop);\n          }\n\n          parentEl = dragEl.parentNode; // actualization\n          // must be done before animation\n\n          if (targetBeforeFirstSwap !== undefined && !isCircumstantialInvert) {\n            targetMoveDistance = Math.abs(targetBeforeFirstSwap - getRect(target)[side1]);\n          }\n\n          changed();\n          return completed(true);\n        }\n      }\n\n      if (el.contains(dragEl)) {\n        return completed(false);\n      }\n    }\n\n    return false;\n  },\n  _ignoreWhileAnimating: null,\n  _offMoveEvents: function _offMoveEvents() {\n    off(document, 'mousemove', this._onTouchMove);\n    off(document, 'touchmove', this._onTouchMove);\n    off(document, 'pointermove', this._onTouchMove);\n    off(document, 'dragover', nearestEmptyInsertDetectEvent);\n    off(document, 'mousemove', nearestEmptyInsertDetectEvent);\n    off(document, 'touchmove', nearestEmptyInsertDetectEvent);\n  },\n  _offUpEvents: function _offUpEvents() {\n    var ownerDocument = this.el.ownerDocument;\n    off(ownerDocument, 'mouseup', this._onDrop);\n    off(ownerDocument, 'touchend', this._onDrop);\n    off(ownerDocument, 'pointerup', this._onDrop);\n    off(ownerDocument, 'touchcancel', this._onDrop);\n    off(document, 'selectstart', this);\n  },\n  _onDrop: function _onDrop(\n  /**Event*/\n  evt) {\n    var el = this.el,\n        options = this.options; // Get the index of the dragged element within its parent\n\n    newIndex = index(dragEl);\n    newDraggableIndex = index(dragEl, options.draggable);\n    pluginEvent('drop', this, {\n      evt: evt\n    });\n    parentEl = dragEl && dragEl.parentNode; // Get again after plugin event\n\n    newIndex = index(dragEl);\n    newDraggableIndex = index(dragEl, options.draggable);\n\n    if (Sortable.eventCanceled) {\n      this._nulling();\n\n      return;\n    }\n\n    awaitingDragStarted = false;\n    isCircumstantialInvert = false;\n    pastFirstInvertThresh = false;\n    clearInterval(this._loopId);\n    clearTimeout(this._dragStartTimer);\n\n    _cancelNextTick(this.cloneId);\n\n    _cancelNextTick(this._dragStartId); // Unbind events\n\n\n    if (this.nativeDraggable) {\n      off(document, 'drop', this);\n      off(el, 'dragstart', this._onDragStart);\n    }\n\n    this._offMoveEvents();\n\n    this._offUpEvents();\n\n    if (Safari) {\n      css(document.body, 'user-select', '');\n    }\n\n    css(dragEl, 'transform', '');\n\n    if (evt) {\n      if (moved) {\n        evt.cancelable && evt.preventDefault();\n        !options.dropBubble && evt.stopPropagation();\n      }\n\n      ghostEl && ghostEl.parentNode && ghostEl.parentNode.removeChild(ghostEl);\n\n      if (rootEl === parentEl || putSortable && putSortable.lastPutMode !== 'clone') {\n        // Remove clone(s)\n        cloneEl && cloneEl.parentNode && cloneEl.parentNode.removeChild(cloneEl);\n      }\n\n      if (dragEl) {\n        if (this.nativeDraggable) {\n          off(dragEl, 'dragend', this);\n        }\n\n        _disableDraggable(dragEl);\n\n        dragEl.style['will-change'] = ''; // Remove classes\n        // ghostClass is added in dragStarted\n\n        if (moved && !awaitingDragStarted) {\n          toggleClass(dragEl, putSortable ? putSortable.options.ghostClass : this.options.ghostClass, false);\n        }\n\n        toggleClass(dragEl, this.options.chosenClass, false); // Drag stop event\n\n        _dispatchEvent({\n          sortable: this,\n          name: 'unchoose',\n          toEl: parentEl,\n          newIndex: null,\n          newDraggableIndex: null,\n          originalEvent: evt\n        });\n\n        if (rootEl !== parentEl) {\n          if (newIndex >= 0) {\n            // Add event\n            _dispatchEvent({\n              rootEl: parentEl,\n              name: 'add',\n              toEl: parentEl,\n              fromEl: rootEl,\n              originalEvent: evt\n            }); // Remove event\n\n\n            _dispatchEvent({\n              sortable: this,\n              name: 'remove',\n              toEl: parentEl,\n              originalEvent: evt\n            }); // drag from one list and drop into another\n\n\n            _dispatchEvent({\n              rootEl: parentEl,\n              name: 'sort',\n              toEl: parentEl,\n              fromEl: rootEl,\n              originalEvent: evt\n            });\n\n            _dispatchEvent({\n              sortable: this,\n              name: 'sort',\n              toEl: parentEl,\n              originalEvent: evt\n            });\n          }\n\n          putSortable && putSortable.save();\n        } else {\n          if (newIndex !== oldIndex) {\n            if (newIndex >= 0) {\n              // drag & drop within the same list\n              _dispatchEvent({\n                sortable: this,\n                name: 'update',\n                toEl: parentEl,\n                originalEvent: evt\n              });\n\n              _dispatchEvent({\n                sortable: this,\n                name: 'sort',\n                toEl: parentEl,\n                originalEvent: evt\n              });\n            }\n          }\n        }\n\n        if (Sortable.active) {\n          /* jshint eqnull:true */\n          if (newIndex == null || newIndex === -1) {\n            newIndex = oldIndex;\n            newDraggableIndex = oldDraggableIndex;\n          }\n\n          _dispatchEvent({\n            sortable: this,\n            name: 'end',\n            toEl: parentEl,\n            originalEvent: evt\n          }); // Save sorting\n\n\n          this.save();\n        }\n      }\n    }\n\n    this._nulling();\n  },\n  _nulling: function _nulling() {\n    pluginEvent('nulling', this);\n    rootEl = dragEl = parentEl = ghostEl = nextEl = cloneEl = lastDownEl = cloneHidden = tapEvt = touchEvt = moved = newIndex = newDraggableIndex = oldIndex = oldDraggableIndex = lastTarget = lastDirection = putSortable = activeGroup = Sortable.dragged = Sortable.ghost = Sortable.clone = Sortable.active = null;\n    savedInputChecked.forEach(function (el) {\n      el.checked = true;\n    });\n    savedInputChecked.length = lastDx = lastDy = 0;\n  },\n  handleEvent: function handleEvent(\n  /**Event*/\n  evt) {\n    switch (evt.type) {\n      case 'drop':\n      case 'dragend':\n        this._onDrop(evt);\n\n        break;\n\n      case 'dragenter':\n      case 'dragover':\n        if (dragEl) {\n          this._onDragOver(evt);\n\n          _globalDragOver(evt);\n        }\n\n        break;\n\n      case 'selectstart':\n        evt.preventDefault();\n        break;\n    }\n  },\n\n  /**\n   * Serializes the item into an array of string.\n   * @returns {String[]}\n   */\n  toArray: function toArray() {\n    var order = [],\n        el,\n        children = this.el.children,\n        i = 0,\n        n = children.length,\n        options = this.options;\n\n    for (; i < n; i++) {\n      el = children[i];\n\n      if (closest(el, options.draggable, this.el, false)) {\n        order.push(el.getAttribute(options.dataIdAttr) || _generateId(el));\n      }\n    }\n\n    return order;\n  },\n\n  /**\n   * Sorts the elements according to the array.\n   * @param  {String[]}  order  order of the items\n   */\n  sort: function sort(order) {\n    var items = {},\n        rootEl = this.el;\n    this.toArray().forEach(function (id, i) {\n      var el = rootEl.children[i];\n\n      if (closest(el, this.options.draggable, rootEl, false)) {\n        items[id] = el;\n      }\n    }, this);\n    order.forEach(function (id) {\n      if (items[id]) {\n        rootEl.removeChild(items[id]);\n        rootEl.appendChild(items[id]);\n      }\n    });\n  },\n\n  /**\n   * Save the current sorting\n   */\n  save: function save() {\n    var store = this.options.store;\n    store && store.set && store.set(this);\n  },\n\n  /**\n   * For each element in the set, get the first element that matches the selector by testing the element itself and traversing up through its ancestors in the DOM tree.\n   * @param   {HTMLElement}  el\n   * @param   {String}       [selector]  default: `options.draggable`\n   * @returns {HTMLElement|null}\n   */\n  closest: function closest$1(el, selector) {\n    return closest(el, selector || this.options.draggable, this.el, false);\n  },\n\n  /**\n   * Set/get option\n   * @param   {string} name\n   * @param   {*}      [value]\n   * @returns {*}\n   */\n  option: function option(name, value) {\n    var options = this.options;\n\n    if (value === void 0) {\n      return options[name];\n    } else {\n      var modifiedValue = PluginManager.modifyOption(this, name, value);\n\n      if (typeof modifiedValue !== 'undefined') {\n        options[name] = modifiedValue;\n      } else {\n        options[name] = value;\n      }\n\n      if (name === 'group') {\n        _prepareGroup(options);\n      }\n    }\n  },\n\n  /**\n   * Destroy\n   */\n  destroy: function destroy() {\n    pluginEvent('destroy', this);\n    var el = this.el;\n    el[expando] = null;\n    off(el, 'mousedown', this._onTapStart);\n    off(el, 'touchstart', this._onTapStart);\n    off(el, 'pointerdown', this._onTapStart);\n\n    if (this.nativeDraggable) {\n      off(el, 'dragover', this);\n      off(el, 'dragenter', this);\n    } // Remove draggable attributes\n\n\n    Array.prototype.forEach.call(el.querySelectorAll('[draggable]'), function (el) {\n      el.removeAttribute('draggable');\n    });\n\n    this._onDrop();\n\n    this._disableDelayedDragEvents();\n\n    sortables.splice(sortables.indexOf(this.el), 1);\n    this.el = el = null;\n  },\n  _hideClone: function _hideClone() {\n    if (!cloneHidden) {\n      pluginEvent('hideClone', this);\n      if (Sortable.eventCanceled) return;\n      css(cloneEl, 'display', 'none');\n\n      if (this.options.removeCloneOnHide && cloneEl.parentNode) {\n        cloneEl.parentNode.removeChild(cloneEl);\n      }\n\n      cloneHidden = true;\n    }\n  },\n  _showClone: function _showClone(putSortable) {\n    if (putSortable.lastPutMode !== 'clone') {\n      this._hideClone();\n\n      return;\n    }\n\n    if (cloneHidden) {\n      pluginEvent('showClone', this);\n      if (Sortable.eventCanceled) return; // show clone at dragEl or original position\n\n      if (rootEl.contains(dragEl) && !this.options.group.revertClone) {\n        rootEl.insertBefore(cloneEl, dragEl);\n      } else if (nextEl) {\n        rootEl.insertBefore(cloneEl, nextEl);\n      } else {\n        rootEl.appendChild(cloneEl);\n      }\n\n      if (this.options.group.revertClone) {\n        this.animate(dragEl, cloneEl);\n      }\n\n      css(cloneEl, 'display', '');\n      cloneHidden = false;\n    }\n  }\n};\n\nfunction _globalDragOver(\n/**Event*/\nevt) {\n  if (evt.dataTransfer) {\n    evt.dataTransfer.dropEffect = 'move';\n  }\n\n  evt.cancelable && evt.preventDefault();\n}\n\nfunction _onMove(fromEl, toEl, dragEl, dragRect, targetEl, targetRect, originalEvent, willInsertAfter) {\n  var evt,\n      sortable = fromEl[expando],\n      onMoveFn = sortable.options.onMove,\n      retVal; // Support for new CustomEvent feature\n\n  if (window.CustomEvent && !IE11OrLess && !Edge) {\n    evt = new CustomEvent('move', {\n      bubbles: true,\n      cancelable: true\n    });\n  } else {\n    evt = document.createEvent('Event');\n    evt.initEvent('move', true, true);\n  }\n\n  evt.to = toEl;\n  evt.from = fromEl;\n  evt.dragged = dragEl;\n  evt.draggedRect = dragRect;\n  evt.related = targetEl || toEl;\n  evt.relatedRect = targetRect || getRect(toEl);\n  evt.willInsertAfter = willInsertAfter;\n  evt.originalEvent = originalEvent;\n  fromEl.dispatchEvent(evt);\n\n  if (onMoveFn) {\n    retVal = onMoveFn.call(sortable, evt, originalEvent);\n  }\n\n  return retVal;\n}\n\nfunction _disableDraggable(el) {\n  el.draggable = false;\n}\n\nfunction _unsilent() {\n  _silent = false;\n}\n\nfunction _ghostIsLast(evt, vertical, sortable) {\n  var rect = getRect(lastChild(sortable.el, sortable.options.draggable));\n  var spacer = 10;\n  return vertical ? evt.clientX > rect.right + spacer || evt.clientX <= rect.right && evt.clientY > rect.bottom && evt.clientX >= rect.left : evt.clientX > rect.right && evt.clientY > rect.top || evt.clientX <= rect.right && evt.clientY > rect.bottom + spacer;\n}\n\nfunction _getSwapDirection(evt, target, targetRect, vertical, swapThreshold, invertedSwapThreshold, invertSwap, isLastTarget) {\n  var mouseOnAxis = vertical ? evt.clientY : evt.clientX,\n      targetLength = vertical ? targetRect.height : targetRect.width,\n      targetS1 = vertical ? targetRect.top : targetRect.left,\n      targetS2 = vertical ? targetRect.bottom : targetRect.right,\n      invert = false;\n\n  if (!invertSwap) {\n    // Never invert or create dragEl shadow when target movemenet causes mouse to move past the end of regular swapThreshold\n    if (isLastTarget && targetMoveDistance < targetLength * swapThreshold) {\n      // multiplied only by swapThreshold because mouse will already be inside target by (1 - threshold) * targetLength / 2\n      // check if past first invert threshold on side opposite of lastDirection\n      if (!pastFirstInvertThresh && (lastDirection === 1 ? mouseOnAxis > targetS1 + targetLength * invertedSwapThreshold / 2 : mouseOnAxis < targetS2 - targetLength * invertedSwapThreshold / 2)) {\n        // past first invert threshold, do not restrict inverted threshold to dragEl shadow\n        pastFirstInvertThresh = true;\n      }\n\n      if (!pastFirstInvertThresh) {\n        // dragEl shadow (target move distance shadow)\n        if (lastDirection === 1 ? mouseOnAxis < targetS1 + targetMoveDistance // over dragEl shadow\n        : mouseOnAxis > targetS2 - targetMoveDistance) {\n          return -lastDirection;\n        }\n      } else {\n        invert = true;\n      }\n    } else {\n      // Regular\n      if (mouseOnAxis > targetS1 + targetLength * (1 - swapThreshold) / 2 && mouseOnAxis < targetS2 - targetLength * (1 - swapThreshold) / 2) {\n        return _getInsertDirection(target);\n      }\n    }\n  }\n\n  invert = invert || invertSwap;\n\n  if (invert) {\n    // Invert of regular\n    if (mouseOnAxis < targetS1 + targetLength * invertedSwapThreshold / 2 || mouseOnAxis > targetS2 - targetLength * invertedSwapThreshold / 2) {\n      return mouseOnAxis > targetS1 + targetLength / 2 ? 1 : -1;\n    }\n  }\n\n  return 0;\n}\n/**\n * Gets the direction dragEl must be swapped relative to target in order to make it\n * seem that dragEl has been \"inserted\" into that element's position\n * @param  {HTMLElement} target       The target whose position dragEl is being inserted at\n * @return {Number}                   Direction dragEl must be swapped\n */\n\n\nfunction _getInsertDirection(target) {\n  if (index(dragEl) < index(target)) {\n    return 1;\n  } else {\n    return -1;\n  }\n}\n/**\n * Generate id\n * @param   {HTMLElement} el\n * @returns {String}\n * @private\n */\n\n\nfunction _generateId(el) {\n  var str = el.tagName + el.className + el.src + el.href + el.textContent,\n      i = str.length,\n      sum = 0;\n\n  while (i--) {\n    sum += str.charCodeAt(i);\n  }\n\n  return sum.toString(36);\n}\n\nfunction _saveInputCheckedState(root) {\n  savedInputChecked.length = 0;\n  var inputs = root.getElementsByTagName('input');\n  var idx = inputs.length;\n\n  while (idx--) {\n    var el = inputs[idx];\n    el.checked && savedInputChecked.push(el);\n  }\n}\n\nfunction _nextTick(fn) {\n  return setTimeout(fn, 0);\n}\n\nfunction _cancelNextTick(id) {\n  return clearTimeout(id);\n} // Fixed #973:\n\n\nif (documentExists) {\n  on(document, 'touchmove', function (evt) {\n    if ((Sortable.active || awaitingDragStarted) && evt.cancelable) {\n      evt.preventDefault();\n    }\n  });\n} // Export utils\n\n\nSortable.utils = {\n  on: on,\n  off: off,\n  css: css,\n  find: find,\n  is: function is(el, selector) {\n    return !!closest(el, selector, el, false);\n  },\n  extend: extend,\n  throttle: throttle,\n  closest: closest,\n  toggleClass: toggleClass,\n  clone: clone,\n  index: index,\n  nextTick: _nextTick,\n  cancelNextTick: _cancelNextTick,\n  detectDirection: _detectDirection,\n  getChild: getChild\n};\n/**\n * Get the Sortable instance of an element\n * @param  {HTMLElement} element The element\n * @return {Sortable|undefined}         The instance of Sortable\n */\n\nSortable.get = function (element) {\n  return element[expando];\n};\n/**\n * Mount a plugin to Sortable\n * @param  {...SortablePlugin|SortablePlugin[]} plugins       Plugins being mounted\n */\n\n\nSortable.mount = function () {\n  for (var _len = arguments.length, plugins = new Array(_len), _key = 0; _key < _len; _key++) {\n    plugins[_key] = arguments[_key];\n  }\n\n  if (plugins[0].constructor === Array) plugins = plugins[0];\n  plugins.forEach(function (plugin) {\n    if (!plugin.prototype || !plugin.prototype.constructor) {\n      throw \"Sortable: Mounted plugin must be a constructor function, not \".concat({}.toString.call(plugin));\n    }\n\n    if (plugin.utils) Sortable.utils = _objectSpread({}, Sortable.utils, plugin.utils);\n    PluginManager.mount(plugin);\n  });\n};\n/**\n * Create sortable instance\n * @param {HTMLElement}  el\n * @param {Object}      [options]\n */\n\n\nSortable.create = function (el, options) {\n  return new Sortable(el, options);\n}; // Export\n\n\nSortable.version = version;\n\nvar autoScrolls = [],\n    scrollEl,\n    scrollRootEl,\n    scrolling = false,\n    lastAutoScrollX,\n    lastAutoScrollY,\n    touchEvt$1,\n    pointerElemChangedInterval;\n\nfunction AutoScrollPlugin() {\n  function AutoScroll() {\n    this.defaults = {\n      scroll: true,\n      scrollSensitivity: 30,\n      scrollSpeed: 10,\n      bubbleScroll: true\n    }; // Bind all private methods\n\n    for (var fn in this) {\n      if (fn.charAt(0) === '_' && typeof this[fn] === 'function') {\n        this[fn] = this[fn].bind(this);\n      }\n    }\n  }\n\n  AutoScroll.prototype = {\n    dragStarted: function dragStarted(_ref) {\n      var originalEvent = _ref.originalEvent;\n\n      if (this.sortable.nativeDraggable) {\n        on(document, 'dragover', this._handleAutoScroll);\n      } else {\n        if (this.options.supportPointer) {\n          on(document, 'pointermove', this._handleFallbackAutoScroll);\n        } else if (originalEvent.touches) {\n          on(document, 'touchmove', this._handleFallbackAutoScroll);\n        } else {\n          on(document, 'mousemove', this._handleFallbackAutoScroll);\n        }\n      }\n    },\n    dragOverCompleted: function dragOverCompleted(_ref2) {\n      var originalEvent = _ref2.originalEvent;\n\n      // For when bubbling is canceled and using fallback (fallback 'touchmove' always reached)\n      if (!this.options.dragOverBubble && !originalEvent.rootEl) {\n        this._handleAutoScroll(originalEvent);\n      }\n    },\n    drop: function drop() {\n      if (this.sortable.nativeDraggable) {\n        off(document, 'dragover', this._handleAutoScroll);\n      } else {\n        off(document, 'pointermove', this._handleFallbackAutoScroll);\n        off(document, 'touchmove', this._handleFallbackAutoScroll);\n        off(document, 'mousemove', this._handleFallbackAutoScroll);\n      }\n\n      clearPointerElemChangedInterval();\n      clearAutoScrolls();\n      cancelThrottle();\n    },\n    nulling: function nulling() {\n      touchEvt$1 = scrollRootEl = scrollEl = scrolling = pointerElemChangedInterval = lastAutoScrollX = lastAutoScrollY = null;\n      autoScrolls.length = 0;\n    },\n    _handleFallbackAutoScroll: function _handleFallbackAutoScroll(evt) {\n      this._handleAutoScroll(evt, true);\n    },\n    _handleAutoScroll: function _handleAutoScroll(evt, fallback) {\n      var _this = this;\n\n      var x = (evt.touches ? evt.touches[0] : evt).clientX,\n          y = (evt.touches ? evt.touches[0] : evt).clientY,\n          elem = document.elementFromPoint(x, y);\n      touchEvt$1 = evt; // IE does not seem to have native autoscroll,\n      // Edge's autoscroll seems too conditional,\n      // MACOS Safari does not have autoscroll,\n      // Firefox and Chrome are good\n\n      if (fallback || Edge || IE11OrLess || Safari) {\n        autoScroll(evt, this.options, elem, fallback); // Listener for pointer element change\n\n        var ogElemScroller = getParentAutoScrollElement(elem, true);\n\n        if (scrolling && (!pointerElemChangedInterval || x !== lastAutoScrollX || y !== lastAutoScrollY)) {\n          pointerElemChangedInterval && clearPointerElemChangedInterval(); // Detect for pointer elem change, emulating native DnD behaviour\n\n          pointerElemChangedInterval = setInterval(function () {\n            var newElem = getParentAutoScrollElement(document.elementFromPoint(x, y), true);\n\n            if (newElem !== ogElemScroller) {\n              ogElemScroller = newElem;\n              clearAutoScrolls();\n            }\n\n            autoScroll(evt, _this.options, newElem, fallback);\n          }, 10);\n          lastAutoScrollX = x;\n          lastAutoScrollY = y;\n        }\n      } else {\n        // if DnD is enabled (and browser has good autoscrolling), first autoscroll will already scroll, so get parent autoscroll of first autoscroll\n        if (!this.options.bubbleScroll || getParentAutoScrollElement(elem, true) === getWindowScrollingElement()) {\n          clearAutoScrolls();\n          return;\n        }\n\n        autoScroll(evt, this.options, getParentAutoScrollElement(elem, false), false);\n      }\n    }\n  };\n  return _extends(AutoScroll, {\n    pluginName: 'scroll',\n    initializeByDefault: true\n  });\n}\n\nfunction clearAutoScrolls() {\n  autoScrolls.forEach(function (autoScroll) {\n    clearInterval(autoScroll.pid);\n  });\n  autoScrolls = [];\n}\n\nfunction clearPointerElemChangedInterval() {\n  clearInterval(pointerElemChangedInterval);\n}\n\nvar autoScroll = throttle(function (evt, options, rootEl, isFallback) {\n  // Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=505521\n  if (!options.scroll) return;\n  var x = (evt.touches ? evt.touches[0] : evt).clientX,\n      y = (evt.touches ? evt.touches[0] : evt).clientY,\n      sens = options.scrollSensitivity,\n      speed = options.scrollSpeed,\n      winScroller = getWindowScrollingElement();\n  var scrollThisInstance = false,\n      scrollCustomFn; // New scroll root, set scrollEl\n\n  if (scrollRootEl !== rootEl) {\n    scrollRootEl = rootEl;\n    clearAutoScrolls();\n    scrollEl = options.scroll;\n    scrollCustomFn = options.scrollFn;\n\n    if (scrollEl === true) {\n      scrollEl = getParentAutoScrollElement(rootEl, true);\n    }\n  }\n\n  var layersOut = 0;\n  var currentParent = scrollEl;\n\n  do {\n    var el = currentParent,\n        rect = getRect(el),\n        top = rect.top,\n        bottom = rect.bottom,\n        left = rect.left,\n        right = rect.right,\n        width = rect.width,\n        height = rect.height,\n        canScrollX = void 0,\n        canScrollY = void 0,\n        scrollWidth = el.scrollWidth,\n        scrollHeight = el.scrollHeight,\n        elCSS = css(el),\n        scrollPosX = el.scrollLeft,\n        scrollPosY = el.scrollTop;\n\n    if (el === winScroller) {\n      canScrollX = width < scrollWidth && (elCSS.overflowX === 'auto' || elCSS.overflowX === 'scroll' || elCSS.overflowX === 'visible');\n      canScrollY = height < scrollHeight && (elCSS.overflowY === 'auto' || elCSS.overflowY === 'scroll' || elCSS.overflowY === 'visible');\n    } else {\n      canScrollX = width < scrollWidth && (elCSS.overflowX === 'auto' || elCSS.overflowX === 'scroll');\n      canScrollY = height < scrollHeight && (elCSS.overflowY === 'auto' || elCSS.overflowY === 'scroll');\n    }\n\n    var vx = canScrollX && (Math.abs(right - x) <= sens && scrollPosX + width < scrollWidth) - (Math.abs(left - x) <= sens && !!scrollPosX);\n    var vy = canScrollY && (Math.abs(bottom - y) <= sens && scrollPosY + height < scrollHeight) - (Math.abs(top - y) <= sens && !!scrollPosY);\n\n    if (!autoScrolls[layersOut]) {\n      for (var i = 0; i <= layersOut; i++) {\n        if (!autoScrolls[i]) {\n          autoScrolls[i] = {};\n        }\n      }\n    }\n\n    if (autoScrolls[layersOut].vx != vx || autoScrolls[layersOut].vy != vy || autoScrolls[layersOut].el !== el) {\n      autoScrolls[layersOut].el = el;\n      autoScrolls[layersOut].vx = vx;\n      autoScrolls[layersOut].vy = vy;\n      clearInterval(autoScrolls[layersOut].pid);\n\n      if (vx != 0 || vy != 0) {\n        scrollThisInstance = true;\n        /* jshint loopfunc:true */\n\n        autoScrolls[layersOut].pid = setInterval(function () {\n          // emulate drag over during autoscroll (fallback), emulating native DnD behaviour\n          if (isFallback && this.layer === 0) {\n            Sortable.active._onTouchMove(touchEvt$1); // To move ghost if it is positioned absolutely\n\n          }\n\n          var scrollOffsetY = autoScrolls[this.layer].vy ? autoScrolls[this.layer].vy * speed : 0;\n          var scrollOffsetX = autoScrolls[this.layer].vx ? autoScrolls[this.layer].vx * speed : 0;\n\n          if (typeof scrollCustomFn === 'function') {\n            if (scrollCustomFn.call(Sortable.dragged.parentNode[expando], scrollOffsetX, scrollOffsetY, evt, touchEvt$1, autoScrolls[this.layer].el) !== 'continue') {\n              return;\n            }\n          }\n\n          scrollBy(autoScrolls[this.layer].el, scrollOffsetX, scrollOffsetY);\n        }.bind({\n          layer: layersOut\n        }), 24);\n      }\n    }\n\n    layersOut++;\n  } while (options.bubbleScroll && currentParent !== winScroller && (currentParent = getParentAutoScrollElement(currentParent, false)));\n\n  scrolling = scrollThisInstance; // in case another function catches scrolling as false in between when it is not\n}, 30);\n\nvar drop = function drop(_ref) {\n  var originalEvent = _ref.originalEvent,\n      putSortable = _ref.putSortable,\n      dragEl = _ref.dragEl,\n      activeSortable = _ref.activeSortable,\n      dispatchSortableEvent = _ref.dispatchSortableEvent,\n      hideGhostForTarget = _ref.hideGhostForTarget,\n      unhideGhostForTarget = _ref.unhideGhostForTarget;\n  if (!originalEvent) return;\n  var toSortable = putSortable || activeSortable;\n  hideGhostForTarget();\n  var touch = originalEvent.changedTouches && originalEvent.changedTouches.length ? originalEvent.changedTouches[0] : originalEvent;\n  var target = document.elementFromPoint(touch.clientX, touch.clientY);\n  unhideGhostForTarget();\n\n  if (toSortable && !toSortable.el.contains(target)) {\n    dispatchSortableEvent('spill');\n    this.onSpill({\n      dragEl: dragEl,\n      putSortable: putSortable\n    });\n  }\n};\n\nfunction Revert() {}\n\nRevert.prototype = {\n  startIndex: null,\n  dragStart: function dragStart(_ref2) {\n    var oldDraggableIndex = _ref2.oldDraggableIndex;\n    this.startIndex = oldDraggableIndex;\n  },\n  onSpill: function onSpill(_ref3) {\n    var dragEl = _ref3.dragEl,\n        putSortable = _ref3.putSortable;\n    this.sortable.captureAnimationState();\n\n    if (putSortable) {\n      putSortable.captureAnimationState();\n    }\n\n    var nextSibling = getChild(this.sortable.el, this.startIndex, this.options);\n\n    if (nextSibling) {\n      this.sortable.el.insertBefore(dragEl, nextSibling);\n    } else {\n      this.sortable.el.appendChild(dragEl);\n    }\n\n    this.sortable.animateAll();\n\n    if (putSortable) {\n      putSortable.animateAll();\n    }\n  },\n  drop: drop\n};\n\n_extends(Revert, {\n  pluginName: 'revertOnSpill'\n});\n\nfunction Remove() {}\n\nRemove.prototype = {\n  onSpill: function onSpill(_ref4) {\n    var dragEl = _ref4.dragEl,\n        putSortable = _ref4.putSortable;\n    var parentSortable = putSortable || this.sortable;\n    parentSortable.captureAnimationState();\n    dragEl.parentNode && dragEl.parentNode.removeChild(dragEl);\n    parentSortable.animateAll();\n  },\n  drop: drop\n};\n\n_extends(Remove, {\n  pluginName: 'removeOnSpill'\n});\n\nvar lastSwapEl;\n\nfunction SwapPlugin() {\n  function Swap() {\n    this.defaults = {\n      swapClass: 'sortable-swap-highlight'\n    };\n  }\n\n  Swap.prototype = {\n    dragStart: function dragStart(_ref) {\n      var dragEl = _ref.dragEl;\n      lastSwapEl = dragEl;\n    },\n    dragOverValid: function dragOverValid(_ref2) {\n      var completed = _ref2.completed,\n          target = _ref2.target,\n          onMove = _ref2.onMove,\n          activeSortable = _ref2.activeSortable,\n          changed = _ref2.changed,\n          cancel = _ref2.cancel;\n      if (!activeSortable.options.swap) return;\n      var el = this.sortable.el,\n          options = this.options;\n\n      if (target && target !== el) {\n        var prevSwapEl = lastSwapEl;\n\n        if (onMove(target) !== false) {\n          toggleClass(target, options.swapClass, true);\n          lastSwapEl = target;\n        } else {\n          lastSwapEl = null;\n        }\n\n        if (prevSwapEl && prevSwapEl !== lastSwapEl) {\n          toggleClass(prevSwapEl, options.swapClass, false);\n        }\n      }\n\n      changed();\n      completed(true);\n      cancel();\n    },\n    drop: function drop(_ref3) {\n      var activeSortable = _ref3.activeSortable,\n          putSortable = _ref3.putSortable,\n          dragEl = _ref3.dragEl;\n      var toSortable = putSortable || this.sortable;\n      var options = this.options;\n      lastSwapEl && toggleClass(lastSwapEl, options.swapClass, false);\n\n      if (lastSwapEl && (options.swap || putSortable && putSortable.options.swap)) {\n        if (dragEl !== lastSwapEl) {\n          toSortable.captureAnimationState();\n          if (toSortable !== activeSortable) activeSortable.captureAnimationState();\n          swapNodes(dragEl, lastSwapEl);\n          toSortable.animateAll();\n          if (toSortable !== activeSortable) activeSortable.animateAll();\n        }\n      }\n    },\n    nulling: function nulling() {\n      lastSwapEl = null;\n    }\n  };\n  return _extends(Swap, {\n    pluginName: 'swap',\n    eventProperties: function eventProperties() {\n      return {\n        swapItem: lastSwapEl\n      };\n    }\n  });\n}\n\nfunction swapNodes(n1, n2) {\n  var p1 = n1.parentNode,\n      p2 = n2.parentNode,\n      i1,\n      i2;\n  if (!p1 || !p2 || p1.isEqualNode(n2) || p2.isEqualNode(n1)) return;\n  i1 = index(n1);\n  i2 = index(n2);\n\n  if (p1.isEqualNode(p2) && i1 < i2) {\n    i2++;\n  }\n\n  p1.insertBefore(n2, p1.children[i1]);\n  p2.insertBefore(n1, p2.children[i2]);\n}\n\nvar multiDragElements = [],\n    multiDragClones = [],\n    lastMultiDragSelect,\n    // for selection with modifier key down (SHIFT)\nmultiDragSortable,\n    initialFolding = false,\n    // Initial multi-drag fold when drag started\nfolding = false,\n    // Folding any other time\ndragStarted = false,\n    dragEl$1,\n    clonesFromRect,\n    clonesHidden;\n\nfunction MultiDragPlugin() {\n  function MultiDrag(sortable) {\n    // Bind all private methods\n    for (var fn in this) {\n      if (fn.charAt(0) === '_' && typeof this[fn] === 'function') {\n        this[fn] = this[fn].bind(this);\n      }\n    }\n\n    if (sortable.options.supportPointer) {\n      on(document, 'pointerup', this._deselectMultiDrag);\n    } else {\n      on(document, 'mouseup', this._deselectMultiDrag);\n      on(document, 'touchend', this._deselectMultiDrag);\n    }\n\n    on(document, 'keydown', this._checkKeyDown);\n    on(document, 'keyup', this._checkKeyUp);\n    this.defaults = {\n      selectedClass: 'sortable-selected',\n      multiDragKey: null,\n      setData: function setData(dataTransfer, dragEl) {\n        var data = '';\n\n        if (multiDragElements.length && multiDragSortable === sortable) {\n          multiDragElements.forEach(function (multiDragElement, i) {\n            data += (!i ? '' : ', ') + multiDragElement.textContent;\n          });\n        } else {\n          data = dragEl.textContent;\n        }\n\n        dataTransfer.setData('Text', data);\n      }\n    };\n  }\n\n  MultiDrag.prototype = {\n    multiDragKeyDown: false,\n    isMultiDrag: false,\n    delayStartGlobal: function delayStartGlobal(_ref) {\n      var dragged = _ref.dragEl;\n      dragEl$1 = dragged;\n    },\n    delayEnded: function delayEnded() {\n      this.isMultiDrag = ~multiDragElements.indexOf(dragEl$1);\n    },\n    setupClone: function setupClone(_ref2) {\n      var sortable = _ref2.sortable,\n          cancel = _ref2.cancel;\n      if (!this.isMultiDrag) return;\n\n      for (var i = 0; i < multiDragElements.length; i++) {\n        multiDragClones.push(clone(multiDragElements[i]));\n        multiDragClones[i].sortableIndex = multiDragElements[i].sortableIndex;\n        multiDragClones[i].draggable = false;\n        multiDragClones[i].style['will-change'] = '';\n        toggleClass(multiDragClones[i], this.options.selectedClass, false);\n        multiDragElements[i] === dragEl$1 && toggleClass(multiDragClones[i], this.options.chosenClass, false);\n      }\n\n      sortable._hideClone();\n\n      cancel();\n    },\n    clone: function clone(_ref3) {\n      var sortable = _ref3.sortable,\n          rootEl = _ref3.rootEl,\n          dispatchSortableEvent = _ref3.dispatchSortableEvent,\n          cancel = _ref3.cancel;\n      if (!this.isMultiDrag) return;\n\n      if (!this.options.removeCloneOnHide) {\n        if (multiDragElements.length && multiDragSortable === sortable) {\n          insertMultiDragClones(true, rootEl);\n          dispatchSortableEvent('clone');\n          cancel();\n        }\n      }\n    },\n    showClone: function showClone(_ref4) {\n      var cloneNowShown = _ref4.cloneNowShown,\n          rootEl = _ref4.rootEl,\n          cancel = _ref4.cancel;\n      if (!this.isMultiDrag) return;\n      insertMultiDragClones(false, rootEl);\n      multiDragClones.forEach(function (clone) {\n        css(clone, 'display', '');\n      });\n      cloneNowShown();\n      clonesHidden = false;\n      cancel();\n    },\n    hideClone: function hideClone(_ref5) {\n      var _this = this;\n\n      var sortable = _ref5.sortable,\n          cloneNowHidden = _ref5.cloneNowHidden,\n          cancel = _ref5.cancel;\n      if (!this.isMultiDrag) return;\n      multiDragClones.forEach(function (clone) {\n        css(clone, 'display', 'none');\n\n        if (_this.options.removeCloneOnHide && clone.parentNode) {\n          clone.parentNode.removeChild(clone);\n        }\n      });\n      cloneNowHidden();\n      clonesHidden = true;\n      cancel();\n    },\n    dragStartGlobal: function dragStartGlobal(_ref6) {\n      var sortable = _ref6.sortable;\n\n      if (!this.isMultiDrag && multiDragSortable) {\n        multiDragSortable.multiDrag._deselectMultiDrag();\n      }\n\n      multiDragElements.forEach(function (multiDragElement) {\n        multiDragElement.sortableIndex = index(multiDragElement);\n      }); // Sort multi-drag elements\n\n      multiDragElements = multiDragElements.sort(function (a, b) {\n        return a.sortableIndex - b.sortableIndex;\n      });\n      dragStarted = true;\n    },\n    dragStarted: function dragStarted(_ref7) {\n      var _this2 = this;\n\n      var sortable = _ref7.sortable;\n      if (!this.isMultiDrag) return;\n\n      if (this.options.sort) {\n        // Capture rects,\n        // hide multi drag elements (by positioning them absolute),\n        // set multi drag elements rects to dragRect,\n        // show multi drag elements,\n        // animate to rects,\n        // unset rects & remove from DOM\n        sortable.captureAnimationState();\n\n        if (this.options.animation) {\n          multiDragElements.forEach(function (multiDragElement) {\n            if (multiDragElement === dragEl$1) return;\n            css(multiDragElement, 'position', 'absolute');\n          });\n          var dragRect = getRect(dragEl$1, false, true, true);\n          multiDragElements.forEach(function (multiDragElement) {\n            if (multiDragElement === dragEl$1) return;\n            setRect(multiDragElement, dragRect);\n          });\n          folding = true;\n          initialFolding = true;\n        }\n      }\n\n      sortable.animateAll(function () {\n        folding = false;\n        initialFolding = false;\n\n        if (_this2.options.animation) {\n          multiDragElements.forEach(function (multiDragElement) {\n            unsetRect(multiDragElement);\n          });\n        } // Remove all auxiliary multidrag items from el, if sorting enabled\n\n\n        if (_this2.options.sort) {\n          removeMultiDragElements();\n        }\n      });\n    },\n    dragOver: function dragOver(_ref8) {\n      var target = _ref8.target,\n          completed = _ref8.completed,\n          cancel = _ref8.cancel;\n\n      if (folding && ~multiDragElements.indexOf(target)) {\n        completed(false);\n        cancel();\n      }\n    },\n    revert: function revert(_ref9) {\n      var fromSortable = _ref9.fromSortable,\n          rootEl = _ref9.rootEl,\n          sortable = _ref9.sortable,\n          dragRect = _ref9.dragRect;\n\n      if (multiDragElements.length > 1) {\n        // Setup unfold animation\n        multiDragElements.forEach(function (multiDragElement) {\n          sortable.addAnimationState({\n            target: multiDragElement,\n            rect: folding ? getRect(multiDragElement) : dragRect\n          });\n          unsetRect(multiDragElement);\n          multiDragElement.fromRect = dragRect;\n          fromSortable.removeAnimationState(multiDragElement);\n        });\n        folding = false;\n        insertMultiDragElements(!this.options.removeCloneOnHide, rootEl);\n      }\n    },\n    dragOverCompleted: function dragOverCompleted(_ref10) {\n      var sortable = _ref10.sortable,\n          isOwner = _ref10.isOwner,\n          insertion = _ref10.insertion,\n          activeSortable = _ref10.activeSortable,\n          parentEl = _ref10.parentEl,\n          putSortable = _ref10.putSortable;\n      var options = this.options;\n\n      if (insertion) {\n        // Clones must be hidden before folding animation to capture dragRectAbsolute properly\n        if (isOwner) {\n          activeSortable._hideClone();\n        }\n\n        initialFolding = false; // If leaving sort:false root, or already folding - Fold to new location\n\n        if (options.animation && multiDragElements.length > 1 && (folding || !isOwner && !activeSortable.options.sort && !putSortable)) {\n          // Fold: Set all multi drag elements's rects to dragEl's rect when multi-drag elements are invisible\n          var dragRectAbsolute = getRect(dragEl$1, false, true, true);\n          multiDragElements.forEach(function (multiDragElement) {\n            if (multiDragElement === dragEl$1) return;\n            setRect(multiDragElement, dragRectAbsolute); // Move element(s) to end of parentEl so that it does not interfere with multi-drag clones insertion if they are inserted\n            // while folding, and so that we can capture them again because old sortable will no longer be fromSortable\n\n            parentEl.appendChild(multiDragElement);\n          });\n          folding = true;\n        } // Clones must be shown (and check to remove multi drags) after folding when interfering multiDragElements are moved out\n\n\n        if (!isOwner) {\n          // Only remove if not folding (folding will remove them anyways)\n          if (!folding) {\n            removeMultiDragElements();\n          }\n\n          if (multiDragElements.length > 1) {\n            var clonesHiddenBefore = clonesHidden;\n\n            activeSortable._showClone(sortable); // Unfold animation for clones if showing from hidden\n\n\n            if (activeSortable.options.animation && !clonesHidden && clonesHiddenBefore) {\n              multiDragClones.forEach(function (clone) {\n                activeSortable.addAnimationState({\n                  target: clone,\n                  rect: clonesFromRect\n                });\n                clone.fromRect = clonesFromRect;\n                clone.thisAnimationDuration = null;\n              });\n            }\n          } else {\n            activeSortable._showClone(sortable);\n          }\n        }\n      }\n    },\n    dragOverAnimationCapture: function dragOverAnimationCapture(_ref11) {\n      var dragRect = _ref11.dragRect,\n          isOwner = _ref11.isOwner,\n          activeSortable = _ref11.activeSortable;\n      multiDragElements.forEach(function (multiDragElement) {\n        multiDragElement.thisAnimationDuration = null;\n      });\n\n      if (activeSortable.options.animation && !isOwner && activeSortable.multiDrag.isMultiDrag) {\n        clonesFromRect = _extends({}, dragRect);\n        var dragMatrix = matrix(dragEl$1, true);\n        clonesFromRect.top -= dragMatrix.f;\n        clonesFromRect.left -= dragMatrix.e;\n      }\n    },\n    dragOverAnimationComplete: function dragOverAnimationComplete() {\n      if (folding) {\n        folding = false;\n        removeMultiDragElements();\n      }\n    },\n    drop: function drop(_ref12) {\n      var evt = _ref12.originalEvent,\n          rootEl = _ref12.rootEl,\n          parentEl = _ref12.parentEl,\n          sortable = _ref12.sortable,\n          dispatchSortableEvent = _ref12.dispatchSortableEvent,\n          oldIndex = _ref12.oldIndex,\n          putSortable = _ref12.putSortable;\n      var toSortable = putSortable || this.sortable;\n      if (!evt) return;\n      var options = this.options,\n          children = parentEl.children; // Multi-drag selection\n\n      if (!dragStarted) {\n        if (options.multiDragKey && !this.multiDragKeyDown) {\n          this._deselectMultiDrag();\n        }\n\n        toggleClass(dragEl$1, options.selectedClass, !~multiDragElements.indexOf(dragEl$1));\n\n        if (!~multiDragElements.indexOf(dragEl$1)) {\n          multiDragElements.push(dragEl$1);\n          dispatchEvent({\n            sortable: sortable,\n            rootEl: rootEl,\n            name: 'select',\n            targetEl: dragEl$1,\n            originalEvt: evt\n          }); // Modifier activated, select from last to dragEl\n\n          if (evt.shiftKey && lastMultiDragSelect && sortable.el.contains(lastMultiDragSelect)) {\n            var lastIndex = index(lastMultiDragSelect),\n                currentIndex = index(dragEl$1);\n\n            if (~lastIndex && ~currentIndex && lastIndex !== currentIndex) {\n              // Must include lastMultiDragSelect (select it), in case modified selection from no selection\n              // (but previous selection existed)\n              var n, i;\n\n              if (currentIndex > lastIndex) {\n                i = lastIndex;\n                n = currentIndex;\n              } else {\n                i = currentIndex;\n                n = lastIndex + 1;\n              }\n\n              for (; i < n; i++) {\n                if (~multiDragElements.indexOf(children[i])) continue;\n                toggleClass(children[i], options.selectedClass, true);\n                multiDragElements.push(children[i]);\n                dispatchEvent({\n                  sortable: sortable,\n                  rootEl: rootEl,\n                  name: 'select',\n                  targetEl: children[i],\n                  originalEvt: evt\n                });\n              }\n            }\n          } else {\n            lastMultiDragSelect = dragEl$1;\n          }\n\n          multiDragSortable = toSortable;\n        } else {\n          multiDragElements.splice(multiDragElements.indexOf(dragEl$1), 1);\n          lastMultiDragSelect = null;\n          dispatchEvent({\n            sortable: sortable,\n            rootEl: rootEl,\n            name: 'deselect',\n            targetEl: dragEl$1,\n            originalEvt: evt\n          });\n        }\n      } // Multi-drag drop\n\n\n      if (dragStarted && this.isMultiDrag) {\n        // Do not \"unfold\" after around dragEl if reverted\n        if ((parentEl[expando].options.sort || parentEl !== rootEl) && multiDragElements.length > 1) {\n          var dragRect = getRect(dragEl$1),\n              multiDragIndex = index(dragEl$1, ':not(.' + this.options.selectedClass + ')');\n          if (!initialFolding && options.animation) dragEl$1.thisAnimationDuration = null;\n          toSortable.captureAnimationState();\n\n          if (!initialFolding) {\n            if (options.animation) {\n              dragEl$1.fromRect = dragRect;\n              multiDragElements.forEach(function (multiDragElement) {\n                multiDragElement.thisAnimationDuration = null;\n\n                if (multiDragElement !== dragEl$1) {\n                  var rect = folding ? getRect(multiDragElement) : dragRect;\n                  multiDragElement.fromRect = rect; // Prepare unfold animation\n\n                  toSortable.addAnimationState({\n                    target: multiDragElement,\n                    rect: rect\n                  });\n                }\n              });\n            } // Multi drag elements are not necessarily removed from the DOM on drop, so to reinsert\n            // properly they must all be removed\n\n\n            removeMultiDragElements();\n            multiDragElements.forEach(function (multiDragElement) {\n              if (children[multiDragIndex]) {\n                parentEl.insertBefore(multiDragElement, children[multiDragIndex]);\n              } else {\n                parentEl.appendChild(multiDragElement);\n              }\n\n              multiDragIndex++;\n            }); // If initial folding is done, the elements may have changed position because they are now\n            // unfolding around dragEl, even though dragEl may not have his index changed, so update event\n            // must be fired here as Sortable will not.\n\n            if (oldIndex === index(dragEl$1)) {\n              var update = false;\n              multiDragElements.forEach(function (multiDragElement) {\n                if (multiDragElement.sortableIndex !== index(multiDragElement)) {\n                  update = true;\n                  return;\n                }\n              });\n\n              if (update) {\n                dispatchSortableEvent('update');\n              }\n            }\n          } // Must be done after capturing individual rects (scroll bar)\n\n\n          multiDragElements.forEach(function (multiDragElement) {\n            unsetRect(multiDragElement);\n          });\n          toSortable.animateAll();\n        }\n\n        multiDragSortable = toSortable;\n      } // Remove clones if necessary\n\n\n      if (rootEl === parentEl || putSortable && putSortable.lastPutMode !== 'clone') {\n        multiDragClones.forEach(function (clone) {\n          clone.parentNode && clone.parentNode.removeChild(clone);\n        });\n      }\n    },\n    nullingGlobal: function nullingGlobal() {\n      this.isMultiDrag = dragStarted = false;\n      multiDragClones.length = 0;\n    },\n    destroyGlobal: function destroyGlobal() {\n      this._deselectMultiDrag();\n\n      off(document, 'pointerup', this._deselectMultiDrag);\n      off(document, 'mouseup', this._deselectMultiDrag);\n      off(document, 'touchend', this._deselectMultiDrag);\n      off(document, 'keydown', this._checkKeyDown);\n      off(document, 'keyup', this._checkKeyUp);\n    },\n    _deselectMultiDrag: function _deselectMultiDrag(evt) {\n      if (typeof dragStarted !== \"undefined\" && dragStarted) return; // Only deselect if selection is in this sortable\n\n      if (multiDragSortable !== this.sortable) return; // Only deselect if target is not item in this sortable\n\n      if (evt && closest(evt.target, this.options.draggable, this.sortable.el, false)) return; // Only deselect if left click\n\n      if (evt && evt.button !== 0) return;\n\n      while (multiDragElements.length) {\n        var el = multiDragElements[0];\n        toggleClass(el, this.options.selectedClass, false);\n        multiDragElements.shift();\n        dispatchEvent({\n          sortable: this.sortable,\n          rootEl: this.sortable.el,\n          name: 'deselect',\n          targetEl: el,\n          originalEvt: evt\n        });\n      }\n    },\n    _checkKeyDown: function _checkKeyDown(evt) {\n      if (evt.key === this.options.multiDragKey) {\n        this.multiDragKeyDown = true;\n      }\n    },\n    _checkKeyUp: function _checkKeyUp(evt) {\n      if (evt.key === this.options.multiDragKey) {\n        this.multiDragKeyDown = false;\n      }\n    }\n  };\n  return _extends(MultiDrag, {\n    // Static methods & properties\n    pluginName: 'multiDrag',\n    utils: {\n      /**\r\n       * Selects the provided multi-drag item\r\n       * @param  {HTMLElement} el    The element to be selected\r\n       */\n      select: function select(el) {\n        var sortable = el.parentNode[expando];\n        if (!sortable || !sortable.options.multiDrag || ~multiDragElements.indexOf(el)) return;\n\n        if (multiDragSortable && multiDragSortable !== sortable) {\n          multiDragSortable.multiDrag._deselectMultiDrag();\n\n          multiDragSortable = sortable;\n        }\n\n        toggleClass(el, sortable.options.selectedClass, true);\n        multiDragElements.push(el);\n      },\n\n      /**\r\n       * Deselects the provided multi-drag item\r\n       * @param  {HTMLElement} el    The element to be deselected\r\n       */\n      deselect: function deselect(el) {\n        var sortable = el.parentNode[expando],\n            index = multiDragElements.indexOf(el);\n        if (!sortable || !sortable.options.multiDrag || !~index) return;\n        toggleClass(el, sortable.options.selectedClass, false);\n        multiDragElements.splice(index, 1);\n      }\n    },\n    eventProperties: function eventProperties() {\n      var _this3 = this;\n\n      var oldIndicies = [],\n          newIndicies = [];\n      multiDragElements.forEach(function (multiDragElement) {\n        oldIndicies.push({\n          multiDragElement: multiDragElement,\n          index: multiDragElement.sortableIndex\n        }); // multiDragElements will already be sorted if folding\n\n        var newIndex;\n\n        if (folding && multiDragElement !== dragEl$1) {\n          newIndex = -1;\n        } else if (folding) {\n          newIndex = index(multiDragElement, ':not(.' + _this3.options.selectedClass + ')');\n        } else {\n          newIndex = index(multiDragElement);\n        }\n\n        newIndicies.push({\n          multiDragElement: multiDragElement,\n          index: newIndex\n        });\n      });\n      return {\n        items: _toConsumableArray(multiDragElements),\n        clones: [].concat(multiDragClones),\n        oldIndicies: oldIndicies,\n        newIndicies: newIndicies\n      };\n    },\n    optionListeners: {\n      multiDragKey: function multiDragKey(key) {\n        key = key.toLowerCase();\n\n        if (key === 'ctrl') {\n          key = 'Control';\n        } else if (key.length > 1) {\n          key = key.charAt(0).toUpperCase() + key.substr(1);\n        }\n\n        return key;\n      }\n    }\n  });\n}\n\nfunction insertMultiDragElements(clonesInserted, rootEl) {\n  multiDragElements.forEach(function (multiDragElement, i) {\n    var target = rootEl.children[multiDragElement.sortableIndex + (clonesInserted ? Number(i) : 0)];\n\n    if (target) {\n      rootEl.insertBefore(multiDragElement, target);\n    } else {\n      rootEl.appendChild(multiDragElement);\n    }\n  });\n}\n/**\r\n * Insert multi-drag clones\r\n * @param  {[Boolean]} elementsInserted  Whether the multi-drag elements are inserted\r\n * @param  {HTMLElement} rootEl\r\n */\n\n\nfunction insertMultiDragClones(elementsInserted, rootEl) {\n  multiDragClones.forEach(function (clone, i) {\n    var target = rootEl.children[clone.sortableIndex + (elementsInserted ? Number(i) : 0)];\n\n    if (target) {\n      rootEl.insertBefore(clone, target);\n    } else {\n      rootEl.appendChild(clone);\n    }\n  });\n}\n\nfunction removeMultiDragElements() {\n  multiDragElements.forEach(function (multiDragElement) {\n    if (multiDragElement === dragEl$1) return;\n    multiDragElement.parentNode && multiDragElement.parentNode.removeChild(multiDragElement);\n  });\n}\n\nSortable.mount(new AutoScrollPlugin());\nSortable.mount(Remove, Revert);\n\nexport default Sortable;\nexport { MultiDragPlugin as MultiDrag, Sortable, SwapPlugin as Swap };\n","/* -*- Mode: js; js-indent-level: 2; -*- */\n/*\n * Copyright 2014 Mozilla Foundation and contributors\n * Licensed under the New BSD license. See LICENSE or:\n * http://opensource.org/licenses/BSD-3-Clause\n */\n\nvar util = require('./util');\n\n/**\n * Determine whether mappingB is after mappingA with respect to generated\n * position.\n */\nfunction generatedPositionAfter(mappingA, mappingB) {\n  // Optimized for most common case\n  var lineA = mappingA.generatedLine;\n  var lineB = mappingB.generatedLine;\n  var columnA = mappingA.generatedColumn;\n  var columnB = mappingB.generatedColumn;\n  return lineB > lineA || lineB == lineA && columnB >= columnA ||\n         util.compareByGeneratedPositionsInflated(mappingA, mappingB) <= 0;\n}\n\n/**\n * A data structure to provide a sorted view of accumulated mappings in a\n * performance conscious manner. It trades a neglibable overhead in general\n * case for a large speedup in case of mappings being added in order.\n */\nfunction MappingList() {\n  this._array = [];\n  this._sorted = true;\n  // Serves as infimum\n  this._last = {generatedLine: -1, generatedColumn: 0};\n}\n\n/**\n * Iterate through internal items. This method takes the same arguments that\n * `Array.prototype.forEach` takes.\n *\n * NOTE: The order of the mappings is NOT guaranteed.\n */\nMappingList.prototype.unsortedForEach =\n  function MappingList_forEach(aCallback, aThisArg) {\n    this._array.forEach(aCallback, aThisArg);\n  };\n\n/**\n * Add the given source mapping.\n *\n * @param Object aMapping\n */\nMappingList.prototype.add = function MappingList_add(aMapping) {\n  if (generatedPositionAfter(this._last, aMapping)) {\n    this._last = aMapping;\n    this._array.push(aMapping);\n  } else {\n    this._sorted = false;\n    this._array.push(aMapping);\n  }\n};\n\n/**\n * Returns the flat, sorted array of mappings. The mappings are sorted by\n * generated position.\n *\n * WARNING: This method returns internal data without copying, for\n * performance. The return value must NOT be mutated, and should be treated as\n * an immutable borrow. If you want to take ownership, you must make your own\n * copy.\n */\nMappingList.prototype.toArray = function MappingList_toArray() {\n  if (!this._sorted) {\n    this._array.sort(util.compareByGeneratedPositionsInflated);\n    this._sorted = true;\n  }\n  return this._array;\n};\n\nexports.MappingList = MappingList;\n","'use strict';\n\nexports.decode = exports.parse = require('./decode');\nexports.encode = exports.stringify = require('./encode');\n","/* -*- Mode: js; js-indent-level: 2; -*- */\n/*\n * Copyright 2011 Mozilla Foundation and contributors\n * Licensed under the New BSD license. See LICENSE or:\n * http://opensource.org/licenses/BSD-3-Clause\n */\n\nvar SourceMapGenerator = require('./source-map-generator').SourceMapGenerator;\nvar util = require('./util');\n\n// Matches a Windows-style `\\r\\n` newline or a `\\n` newline used by all other\n// operating systems these days (capturing the result).\nvar REGEX_NEWLINE = /(\\r?\\n)/;\n\n// Newline character code for charCodeAt() comparisons\nvar NEWLINE_CODE = 10;\n\n// Private symbol for identifying `SourceNode`s when multiple versions of\n// the source-map library are loaded. This MUST NOT CHANGE across\n// versions!\nvar isSourceNode = \"$$$isSourceNode$$$\";\n\n/**\n * SourceNodes provide a way to abstract over interpolating/concatenating\n * snippets of generated JavaScript source code while maintaining the line and\n * column information associated with the original source code.\n *\n * @param aLine The original line number.\n * @param aColumn The original column number.\n * @param aSource The original source's filename.\n * @param aChunks Optional. An array of strings which are snippets of\n *        generated JS, or other SourceNodes.\n * @param aName The original identifier.\n */\nfunction SourceNode(aLine, aColumn, aSource, aChunks, aName) {\n  this.children = [];\n  this.sourceContents = {};\n  this.line = aLine == null ? null : aLine;\n  this.column = aColumn == null ? null : aColumn;\n  this.source = aSource == null ? null : aSource;\n  this.name = aName == null ? null : aName;\n  this[isSourceNode] = true;\n  if (aChunks != null) this.add(aChunks);\n}\n\n/**\n * Creates a SourceNode from generated code and a SourceMapConsumer.\n *\n * @param aGeneratedCode The generated code\n * @param aSourceMapConsumer The SourceMap for the generated code\n * @param aRelativePath Optional. The path that relative sources in the\n *        SourceMapConsumer should be relative to.\n */\nSourceNode.fromStringWithSourceMap =\n  function SourceNode_fromStringWithSourceMap(aGeneratedCode, aSourceMapConsumer, aRelativePath) {\n    // The SourceNode we want to fill with the generated code\n    // and the SourceMap\n    var node = new SourceNode();\n\n    // All even indices of this array are one line of the generated code,\n    // while all odd indices are the newlines between two adjacent lines\n    // (since `REGEX_NEWLINE` captures its match).\n    // Processed fragments are accessed by calling `shiftNextLine`.\n    var remainingLines = aGeneratedCode.split(REGEX_NEWLINE);\n    var remainingLinesIndex = 0;\n    var shiftNextLine = function() {\n      var lineContents = getNextLine();\n      // The last line of a file might not have a newline.\n      var newLine = getNextLine() || \"\";\n      return lineContents + newLine;\n\n      function getNextLine() {\n        return remainingLinesIndex < remainingLines.length ?\n            remainingLines[remainingLinesIndex++] : undefined;\n      }\n    };\n\n    // We need to remember the position of \"remainingLines\"\n    var lastGeneratedLine = 1, lastGeneratedColumn = 0;\n\n    // The generate SourceNodes we need a code range.\n    // To extract it current and last mapping is used.\n    // Here we store the last mapping.\n    var lastMapping = null;\n\n    aSourceMapConsumer.eachMapping(function (mapping) {\n      if (lastMapping !== null) {\n        // We add the code from \"lastMapping\" to \"mapping\":\n        // First check if there is a new line in between.\n        if (lastGeneratedLine < mapping.generatedLine) {\n          // Associate first line with \"lastMapping\"\n          addMappingWithCode(lastMapping, shiftNextLine());\n          lastGeneratedLine++;\n          lastGeneratedColumn = 0;\n          // The remaining code is added without mapping\n        } else {\n          // There is no new line in between.\n          // Associate the code between \"lastGeneratedColumn\" and\n          // \"mapping.generatedColumn\" with \"lastMapping\"\n          var nextLine = remainingLines[remainingLinesIndex] || '';\n          var code = nextLine.substr(0, mapping.generatedColumn -\n                                        lastGeneratedColumn);\n          remainingLines[remainingLinesIndex] = nextLine.substr(mapping.generatedColumn -\n                                              lastGeneratedColumn);\n          lastGeneratedColumn = mapping.generatedColumn;\n          addMappingWithCode(lastMapping, code);\n          // No more remaining code, continue\n          lastMapping = mapping;\n          return;\n        }\n      }\n      // We add the generated code until the first mapping\n      // to the SourceNode without any mapping.\n      // Each line is added as separate string.\n      while (lastGeneratedLine < mapping.generatedLine) {\n        node.add(shiftNextLine());\n        lastGeneratedLine++;\n      }\n      if (lastGeneratedColumn < mapping.generatedColumn) {\n        var nextLine = remainingLines[remainingLinesIndex] || '';\n        node.add(nextLine.substr(0, mapping.generatedColumn));\n        remainingLines[remainingLinesIndex] = nextLine.substr(mapping.generatedColumn);\n        lastGeneratedColumn = mapping.generatedColumn;\n      }\n      lastMapping = mapping;\n    }, this);\n    // We have processed all mappings.\n    if (remainingLinesIndex < remainingLines.length) {\n      if (lastMapping) {\n        // Associate the remaining code in the current line with \"lastMapping\"\n        addMappingWithCode(lastMapping, shiftNextLine());\n      }\n      // and add the remaining lines without any mapping\n      node.add(remainingLines.splice(remainingLinesIndex).join(\"\"));\n    }\n\n    // Copy sourcesContent into SourceNode\n    aSourceMapConsumer.sources.forEach(function (sourceFile) {\n      var content = aSourceMapConsumer.sourceContentFor(sourceFile);\n      if (content != null) {\n        if (aRelativePath != null) {\n          sourceFile = util.join(aRelativePath, sourceFile);\n        }\n        node.setSourceContent(sourceFile, content);\n      }\n    });\n\n    return node;\n\n    function addMappingWithCode(mapping, code) {\n      if (mapping === null || mapping.source === undefined) {\n        node.add(code);\n      } else {\n        var source = aRelativePath\n          ? util.join(aRelativePath, mapping.source)\n          : mapping.source;\n        node.add(new SourceNode(mapping.originalLine,\n                                mapping.originalColumn,\n                                source,\n                                code,\n                                mapping.name));\n      }\n    }\n  };\n\n/**\n * Add a chunk of generated JS to this source node.\n *\n * @param aChunk A string snippet of generated JS code, another instance of\n *        SourceNode, or an array where each member is one of those things.\n */\nSourceNode.prototype.add = function SourceNode_add(aChunk) {\n  if (Array.isArray(aChunk)) {\n    aChunk.forEach(function (chunk) {\n      this.add(chunk);\n    }, this);\n  }\n  else if (aChunk[isSourceNode] || typeof aChunk === \"string\") {\n    if (aChunk) {\n      this.children.push(aChunk);\n    }\n  }\n  else {\n    throw new TypeError(\n      \"Expected a SourceNode, string, or an array of SourceNodes and strings. Got \" + aChunk\n    );\n  }\n  return this;\n};\n\n/**\n * Add a chunk of generated JS to the beginning of this source node.\n *\n * @param aChunk A string snippet of generated JS code, another instance of\n *        SourceNode, or an array where each member is one of those things.\n */\nSourceNode.prototype.prepend = function SourceNode_prepend(aChunk) {\n  if (Array.isArray(aChunk)) {\n    for (var i = aChunk.length-1; i >= 0; i--) {\n      this.prepend(aChunk[i]);\n    }\n  }\n  else if (aChunk[isSourceNode] || typeof aChunk === \"string\") {\n    this.children.unshift(aChunk);\n  }\n  else {\n    throw new TypeError(\n      \"Expected a SourceNode, string, or an array of SourceNodes and strings. Got \" + aChunk\n    );\n  }\n  return this;\n};\n\n/**\n * Walk over the tree of JS snippets in this node and its children. The\n * walking function is called once for each snippet of JS and is passed that\n * snippet and the its original associated source's line/column location.\n *\n * @param aFn The traversal function.\n */\nSourceNode.prototype.walk = function SourceNode_walk(aFn) {\n  var chunk;\n  for (var i = 0, len = this.children.length; i < len; i++) {\n    chunk = this.children[i];\n    if (chunk[isSourceNode]) {\n      chunk.walk(aFn);\n    }\n    else {\n      if (chunk !== '') {\n        aFn(chunk, { source: this.source,\n                     line: this.line,\n                     column: this.column,\n                     name: this.name });\n      }\n    }\n  }\n};\n\n/**\n * Like `String.prototype.join` except for SourceNodes. Inserts `aStr` between\n * each of `this.children`.\n *\n * @param aSep The separator.\n */\nSourceNode.prototype.join = function SourceNode_join(aSep) {\n  var newChildren;\n  var i;\n  var len = this.children.length;\n  if (len > 0) {\n    newChildren = [];\n    for (i = 0; i < len-1; i++) {\n      newChildren.push(this.children[i]);\n      newChildren.push(aSep);\n    }\n    newChildren.push(this.children[i]);\n    this.children = newChildren;\n  }\n  return this;\n};\n\n/**\n * Call String.prototype.replace on the very right-most source snippet. Useful\n * for trimming whitespace from the end of a source node, etc.\n *\n * @param aPattern The pattern to replace.\n * @param aReplacement The thing to replace the pattern with.\n */\nSourceNode.prototype.replaceRight = function SourceNode_replaceRight(aPattern, aReplacement) {\n  var lastChild = this.children[this.children.length - 1];\n  if (lastChild[isSourceNode]) {\n    lastChild.replaceRight(aPattern, aReplacement);\n  }\n  else if (typeof lastChild === 'string') {\n    this.children[this.children.length - 1] = lastChild.replace(aPattern, aReplacement);\n  }\n  else {\n    this.children.push(''.replace(aPattern, aReplacement));\n  }\n  return this;\n};\n\n/**\n * Set the source content for a source file. This will be added to the SourceMapGenerator\n * in the sourcesContent field.\n *\n * @param aSourceFile The filename of the source file\n * @param aSourceContent The content of the source file\n */\nSourceNode.prototype.setSourceContent =\n  function SourceNode_setSourceContent(aSourceFile, aSourceContent) {\n    this.sourceContents[util.toSetString(aSourceFile)] = aSourceContent;\n  };\n\n/**\n * Walk over the tree of SourceNodes. The walking function is called for each\n * source file content and is passed the filename and source content.\n *\n * @param aFn The traversal function.\n */\nSourceNode.prototype.walkSourceContents =\n  function SourceNode_walkSourceContents(aFn) {\n    for (var i = 0, len = this.children.length; i < len; i++) {\n      if (this.children[i][isSourceNode]) {\n        this.children[i].walkSourceContents(aFn);\n      }\n    }\n\n    var sources = Object.keys(this.sourceContents);\n    for (var i = 0, len = sources.length; i < len; i++) {\n      aFn(util.fromSetString(sources[i]), this.sourceContents[sources[i]]);\n    }\n  };\n\n/**\n * Return the string representation of this source node. Walks over the tree\n * and concatenates all the various snippets together to one string.\n */\nSourceNode.prototype.toString = function SourceNode_toString() {\n  var str = \"\";\n  this.walk(function (chunk) {\n    str += chunk;\n  });\n  return str;\n};\n\n/**\n * Returns the string representation of this source node along with a source\n * map.\n */\nSourceNode.prototype.toStringWithSourceMap = function SourceNode_toStringWithSourceMap(aArgs) {\n  var generated = {\n    code: \"\",\n    line: 1,\n    column: 0\n  };\n  var map = new SourceMapGenerator(aArgs);\n  var sourceMappingActive = false;\n  var lastOriginalSource = null;\n  var lastOriginalLine = null;\n  var lastOriginalColumn = null;\n  var lastOriginalName = null;\n  this.walk(function (chunk, original) {\n    generated.code += chunk;\n    if (original.source !== null\n        && original.line !== null\n        && original.column !== null) {\n      if(lastOriginalSource !== original.source\n         || lastOriginalLine !== original.line\n         || lastOriginalColumn !== original.column\n         || lastOriginalName !== original.name) {\n        map.addMapping({\n          source: original.source,\n          original: {\n            line: original.line,\n            column: original.column\n          },\n          generated: {\n            line: generated.line,\n            column: generated.column\n          },\n          name: original.name\n        });\n      }\n      lastOriginalSource = original.source;\n      lastOriginalLine = original.line;\n      lastOriginalColumn = original.column;\n      lastOriginalName = original.name;\n      sourceMappingActive = true;\n    } else if (sourceMappingActive) {\n      map.addMapping({\n        generated: {\n          line: generated.line,\n          column: generated.column\n        }\n      });\n      lastOriginalSource = null;\n      sourceMappingActive = false;\n    }\n    for (var idx = 0, length = chunk.length; idx < length; idx++) {\n      if (chunk.charCodeAt(idx) === NEWLINE_CODE) {\n        generated.line++;\n        generated.column = 0;\n        // Mappings end at eol\n        if (idx + 1 === length) {\n          lastOriginalSource = null;\n          sourceMappingActive = false;\n        } else if (sourceMappingActive) {\n          map.addMapping({\n            source: original.source,\n            original: {\n              line: original.line,\n              column: original.column\n            },\n            generated: {\n              line: generated.line,\n              column: generated.column\n            },\n            name: original.name\n          });\n        }\n      } else {\n        generated.column++;\n      }\n    }\n  });\n  this.walkSourceContents(function (sourceFile, sourceContent) {\n    map.setSourceContent(sourceFile, sourceContent);\n  });\n\n  return { code: generated.code, map: map };\n};\n\nexports.SourceNode = SourceNode;\n","/*\n * Copyright 2009-2011 Mozilla Foundation and contributors\n * Licensed under the New BSD license. See LICENSE.txt or:\n * http://opensource.org/licenses/BSD-3-Clause\n */\nexports.SourceMapGenerator = require('./lib/source-map-generator').SourceMapGenerator;\nexports.SourceMapConsumer = require('./lib/source-map-consumer').SourceMapConsumer;\nexports.SourceNode = require('./lib/source-node').SourceNode;\n","// Copyright Joyent, Inc. and other Node contributors.\n//\n// Permission is hereby granted, free of charge, to any person obtaining a\n// copy of this software and associated documentation files (the\n// \"Software\"), to deal in the Software without restriction, including\n// without limitation the rights to use, copy, modify, merge, publish,\n// distribute, sublicense, and/or sell copies of the Software, and to permit\n// persons to whom the Software is furnished to do so, subject to the\n// following conditions:\n//\n// The above copyright notice and this permission notice shall be included\n// in all copies or substantial portions of the Software.\n//\n// THE SOFTWARE IS PROVIDED \"AS IS\", WITHOUT WARRANTY OF ANY KIND, EXPRESS\n// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF\n// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN\n// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,\n// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR\n// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE\n// USE OR OTHER DEALINGS IN THE SOFTWARE.\n\n'use strict';\n\nvar stringifyPrimitive = function(v) {\n  switch (typeof v) {\n    case 'string':\n      return v;\n\n    case 'boolean':\n      return v ? 'true' : 'false';\n\n    case 'number':\n      return isFinite(v) ? v : '';\n\n    default:\n      return '';\n  }\n};\n\nmodule.exports = function(obj, sep, eq, name) {\n  sep = sep || '&';\n  eq = eq || '=';\n  if (obj === null) {\n    obj = undefined;\n  }\n\n  if (typeof obj === 'object') {\n    return map(objectKeys(obj), function(k) {\n      var ks = encodeURIComponent(stringifyPrimitive(k)) + eq;\n      if (isArray(obj[k])) {\n        return map(obj[k], function(v) {\n          return ks + encodeURIComponent(stringifyPrimitive(v));\n        }).join(sep);\n      } else {\n        return ks + encodeURIComponent(stringifyPrimitive(obj[k]));\n      }\n    }).join(sep);\n\n  }\n\n  if (!name) return '';\n  return encodeURIComponent(stringifyPrimitive(name)) + eq +\n         encodeURIComponent(stringifyPrimitive(obj));\n};\n\nvar isArray = Array.isArray || function (xs) {\n  return Object.prototype.toString.call(xs) === '[object Array]';\n};\n\nfunction map (xs, f) {\n  if (xs.map) return xs.map(f);\n  var res = [];\n  for (var i = 0; i < xs.length; i++) {\n    res.push(f(xs[i], i));\n  }\n  return res;\n}\n\nvar objectKeys = Object.keys || function (obj) {\n  var res = [];\n  for (var key in obj) {\n    if (Object.prototype.hasOwnProperty.call(obj, key)) res.push(key);\n  }\n  return res;\n};\n"],"sourceRoot":""}