damus.io

purify.js (65585B)

---

 /*! @license DOMPurify 2.4.1 | (c) Cure53 and other contributors | Released under the Apache license 2.0 and Mozilla Public License 2.0 | github.com/cure53/DOMPurify/blob/2.4.1/LICENSE */
 
 (function (global, factory) {
   typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
   typeof define === 'function' && define.amd ? define(factory) :
   (global = typeof globalThis !== 'undefined' ? globalThis : global || self, global.DOMPurify = factory());
 })(this, (function () { 'use strict';
 
   function _typeof(obj) {
     "@babel/helpers - typeof";
 
     return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (obj) {
       return typeof obj;
     } : function (obj) {
       return obj && "function" == typeof Symbol && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
     }, _typeof(obj);
   }
 
   function _setPrototypeOf(o, p) {
     _setPrototypeOf = Object.setPrototypeOf || function _setPrototypeOf(o, p) {
       o.__proto__ = p;
       return o;
     };
 
     return _setPrototypeOf(o, p);
   }
 
   function _isNativeReflectConstruct() {
     if (typeof Reflect === "undefined" || !Reflect.construct) return false;
     if (Reflect.construct.sham) return false;
     if (typeof Proxy === "function") return true;
 
     try {
       Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {}));
       return true;
     } catch (e) {
       return false;
     }
   }
 
   function _construct(Parent, args, Class) {
     if (_isNativeReflectConstruct()) {
       _construct = Reflect.construct;
     } else {
       _construct = function _construct(Parent, args, Class) {
         var a = [null];
         a.push.apply(a, args);
         var Constructor = Function.bind.apply(Parent, a);
         var instance = new Constructor();
         if (Class) _setPrototypeOf(instance, Class.prototype);
         return instance;
       };
     }
 
     return _construct.apply(null, arguments);
   }
 
   function _toConsumableArray(arr) {
     return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _unsupportedIterableToArray(arr) || _nonIterableSpread();
   }
 
   function _arrayWithoutHoles(arr) {
     if (Array.isArray(arr)) return _arrayLikeToArray(arr);
   }
 
   function _iterableToArray(iter) {
     if (typeof Symbol !== "undefined" && iter[Symbol.iterator] != null || iter["@@iterator"] != null) return Array.from(iter);
   }
 
   function _unsupportedIterableToArray(o, minLen) {
     if (!o) return;
     if (typeof o === "string") return _arrayLikeToArray(o, minLen);
     var n = Object.prototype.toString.call(o).slice(8, -1);
     if (n === "Object" && o.constructor) n = o.constructor.name;
     if (n === "Map" || n === "Set") return Array.from(o);
     if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen);
   }
 
   function _arrayLikeToArray(arr, len) {
     if (len == null || len > arr.length) len = arr.length;
 
     for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i];
 
     return arr2;
   }
 
   function _nonIterableSpread() {
     throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
   }
 
   var hasOwnProperty = Object.hasOwnProperty,
       setPrototypeOf = Object.setPrototypeOf,
       isFrozen = Object.isFrozen,
       getPrototypeOf = Object.getPrototypeOf,
       getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;
   var freeze = Object.freeze,
       seal = Object.seal,
       create = Object.create; // eslint-disable-line import/no-mutable-exports
 
   var _ref = typeof Reflect !== 'undefined' && Reflect,
       apply = _ref.apply,
       construct = _ref.construct;
 
   if (!apply) {
     apply = function apply(fun, thisValue, args) {
       return fun.apply(thisValue, args);
     };
   }
 
   if (!freeze) {
     freeze = function freeze(x) {
       return x;
     };
   }
 
   if (!seal) {
     seal = function seal(x) {
       return x;
     };
   }
 
   if (!construct) {
     construct = function construct(Func, args) {
       return _construct(Func, _toConsumableArray(args));
     };
   }
 
   var arrayForEach = unapply(Array.prototype.forEach);
   var arrayPop = unapply(Array.prototype.pop);
   var arrayPush = unapply(Array.prototype.push);
   var stringToLowerCase = unapply(String.prototype.toLowerCase);
   var stringToString = unapply(String.prototype.toString);
   var stringMatch = unapply(String.prototype.match);
   var stringReplace = unapply(String.prototype.replace);
   var stringIndexOf = unapply(String.prototype.indexOf);
   var stringTrim = unapply(String.prototype.trim);
   var regExpTest = unapply(RegExp.prototype.test);
   var typeErrorCreate = unconstruct(TypeError);
   function unapply(func) {
     return function (thisArg) {
       for (var _len = arguments.length, args = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
         args[_key - 1] = arguments[_key];
       }
 
       return apply(func, thisArg, args);
     };
   }
   function unconstruct(func) {
     return function () {
       for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
         args[_key2] = arguments[_key2];
       }
 
       return construct(func, args);
     };
   }
   /* Add properties to a lookup table */
 
   function addToSet(set, array, transformCaseFunc) {
     transformCaseFunc = transformCaseFunc ? transformCaseFunc : stringToLowerCase;
 
     if (setPrototypeOf) {
       // Make 'in' and truthy checks like Boolean(set.constructor)
       // independent of any properties defined on Object.prototype.
       // Prevent prototype setters from intercepting set as a this value.
       setPrototypeOf(set, null);
     }
 
     var l = array.length;
 
     while (l--) {
       var element = array[l];
 
       if (typeof element === 'string') {
         var lcElement = transformCaseFunc(element);
 
         if (lcElement !== element) {
           // Config presets (e.g. tags.js, attrs.js) are immutable.
           if (!isFrozen(array)) {
             array[l] = lcElement;
           }
 
           element = lcElement;
         }
       }
 
       set[element] = true;
     }
 
     return set;
   }
   /* Shallow clone an object */
 
   function clone(object) {
     var newObject = create(null);
     var property;
 
     for (property in object) {
       if (apply(hasOwnProperty, object, [property])) {
         newObject[property] = object[property];
       }
     }
 
     return newObject;
   }
   /* IE10 doesn't support __lookupGetter__ so lets'
    * simulate it. It also automatically checks
    * if the prop is function or getter and behaves
    * accordingly. */
 
   function lookupGetter(object, prop) {
     while (object !== null) {
       var desc = getOwnPropertyDescriptor(object, prop);
 
       if (desc) {
         if (desc.get) {
           return unapply(desc.get);
         }
 
         if (typeof desc.value === 'function') {
           return unapply(desc.value);
         }
       }
 
       object = getPrototypeOf(object);
     }
 
     function fallbackValue(element) {
       console.warn('fallback value for', element);
       return null;
     }
 
     return fallbackValue;
   }
 
   var html$1 = freeze(['a', 'abbr', 'acronym', 'address', 'area', 'article', 'aside', 'audio', 'b', 'bdi', 'bdo', 'big', 'blink', 'blockquote', 'body', 'br', 'button', 'canvas', 'caption', 'center', 'cite', 'code', 'col', 'colgroup', 'content', 'data', 'datalist', 'dd', 'decorator', 'del', 'details', 'dfn', 'dialog', 'dir', 'div', 'dl', 'dt', 'element', 'em', 'fieldset', 'figcaption', 'figure', 'font', 'footer', 'form', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'head', 'header', 'hgroup', 'hr', 'html', 'i', 'img', 'input', 'ins', 'kbd', 'label', 'legend', 'li', 'main', 'map', 'mark', 'marquee', 'menu', 'menuitem', 'meter', 'nav', 'nobr', 'ol', 'optgroup', 'option', 'output', 'p', 'picture', 'pre', 'progress', 'q', 'rp', 'rt', 'ruby', 's', 'samp', 'section', 'select', 'shadow', 'small', 'source', 'spacer', 'span', 'strike', 'strong', 'style', 'sub', 'summary', 'sup', 'table', 'tbody', 'td', 'template', 'textarea', 'tfoot', 'th', 'thead', 'time', 'tr', 'track', 'tt', 'u', 'ul', 'var', 'video', 'wbr']); // SVG
 
   var svg$1 = freeze(['svg', 'a', 'altglyph', 'altglyphdef', 'altglyphitem', 'animatecolor', 'animatemotion', 'animatetransform', 'circle', 'clippath', 'defs', 'desc', 'ellipse', 'filter', 'font', 'g', 'glyph', 'glyphref', 'hkern', 'image', 'line', 'lineargradient', 'marker', 'mask', 'metadata', 'mpath', 'path', 'pattern', 'polygon', 'polyline', 'radialgradient', 'rect', 'stop', 'style', 'switch', 'symbol', 'text', 'textpath', 'title', 'tref', 'tspan', 'view', 'vkern']);
   var svgFilters = freeze(['feBlend', 'feColorMatrix', 'feComponentTransfer', 'feComposite', 'feConvolveMatrix', 'feDiffuseLighting', 'feDisplacementMap', 'feDistantLight', 'feFlood', 'feFuncA', 'feFuncB', 'feFuncG', 'feFuncR', 'feGaussianBlur', 'feImage', 'feMerge', 'feMergeNode', 'feMorphology', 'feOffset', 'fePointLight', 'feSpecularLighting', 'feSpotLight', 'feTile', 'feTurbulence']); // List of SVG elements that are disallowed by default.
   // We still need to know them so that we can do namespace
   // checks properly in case one wants to add them to
   // allow-list.
 
   var svgDisallowed = freeze(['animate', 'color-profile', 'cursor', 'discard', 'fedropshadow', 'font-face', 'font-face-format', 'font-face-name', 'font-face-src', 'font-face-uri', 'foreignobject', 'hatch', 'hatchpath', 'mesh', 'meshgradient', 'meshpatch', 'meshrow', 'missing-glyph', 'script', 'set', 'solidcolor', 'unknown', 'use']);
   var mathMl$1 = freeze(['math', 'menclose', 'merror', 'mfenced', 'mfrac', 'mglyph', 'mi', 'mlabeledtr', 'mmultiscripts', 'mn', 'mo', 'mover', 'mpadded', 'mphantom', 'mroot', 'mrow', 'ms', 'mspace', 'msqrt', 'mstyle', 'msub', 'msup', 'msubsup', 'mtable', 'mtd', 'mtext', 'mtr', 'munder', 'munderover']); // Similarly to SVG, we want to know all MathML elements,
   // even those that we disallow by default.
 
   var mathMlDisallowed = freeze(['maction', 'maligngroup', 'malignmark', 'mlongdiv', 'mscarries', 'mscarry', 'msgroup', 'mstack', 'msline', 'msrow', 'semantics', 'annotation', 'annotation-xml', 'mprescripts', 'none']);
   var text = freeze(['#text']);
 
   var html = freeze(['accept', 'action', 'align', 'alt', 'autocapitalize', 'autocomplete', 'autopictureinpicture', 'autoplay', 'background', 'bgcolor', 'border', 'capture', 'cellpadding', 'cellspacing', 'checked', 'cite', 'class', 'clear', 'color', 'cols', 'colspan', 'controls', 'controlslist', 'coords', 'crossorigin', 'datetime', 'decoding', 'default', 'dir', 'disabled', 'disablepictureinpicture', 'disableremoteplayback', 'download', 'draggable', 'enctype', 'enterkeyhint', 'face', 'for', 'headers', 'height', 'hidden', 'high', 'href', 'hreflang', 'id', 'inputmode', 'integrity', 'ismap', 'kind', 'label', 'lang', 'list', 'loading', 'loop', 'low', 'max', 'maxlength', 'media', 'method', 'min', 'minlength', 'multiple', 'muted', 'name', 'nonce', 'noshade', 'novalidate', 'nowrap', 'open', 'optimum', 'pattern', 'placeholder', 'playsinline', 'poster', 'preload', 'pubdate', 'radiogroup', 'readonly', 'rel', 'required', 'rev', 'reversed', 'role', 'rows', 'rowspan', 'spellcheck', 'scope', 'selected', 'shape', 'size', 'sizes', 'span', 'srclang', 'start', 'src', 'srcset', 'step', 'style', 'summary', 'tabindex', 'title', 'translate', 'type', 'usemap', 'valign', 'value', 'width', 'xmlns', 'slot']);
   var svg = freeze(['accent-height', 'accumulate', 'additive', 'alignment-baseline', 'ascent', 'attributename', 'attributetype', 'azimuth', 'basefrequency', 'baseline-shift', 'begin', 'bias', 'by', 'class', 'clip', 'clippathunits', 'clip-path', 'clip-rule', 'color', 'color-interpolation', 'color-interpolation-filters', 'color-profile', 'color-rendering', 'cx', 'cy', 'd', 'dx', 'dy', 'diffuseconstant', 'direction', 'display', 'divisor', 'dur', 'edgemode', 'elevation', 'end', 'fill', 'fill-opacity', 'fill-rule', 'filter', 'filterunits', 'flood-color', 'flood-opacity', 'font-family', 'font-size', 'font-size-adjust', 'font-stretch', 'font-style', 'font-variant', 'font-weight', 'fx', 'fy', 'g1', 'g2', 'glyph-name', 'glyphref', 'gradientunits', 'gradienttransform', 'height', 'href', 'id', 'image-rendering', 'in', 'in2', 'k', 'k1', 'k2', 'k3', 'k4', 'kerning', 'keypoints', 'keysplines', 'keytimes', 'lang', 'lengthadjust', 'letter-spacing', 'kernelmatrix', 'kernelunitlength', 'lighting-color', 'local', 'marker-end', 'marker-mid', 'marker-start', 'markerheight', 'markerunits', 'markerwidth', 'maskcontentunits', 'maskunits', 'max', 'mask', 'media', 'method', 'mode', 'min', 'name', 'numoctaves', 'offset', 'operator', 'opacity', 'order', 'orient', 'orientation', 'origin', 'overflow', 'paint-order', 'path', 'pathlength', 'patterncontentunits', 'patterntransform', 'patternunits', 'points', 'preservealpha', 'preserveaspectratio', 'primitiveunits', 'r', 'rx', 'ry', 'radius', 'refx', 'refy', 'repeatcount', 'repeatdur', 'restart', 'result', 'rotate', 'scale', 'seed', 'shape-rendering', 'specularconstant', 'specularexponent', 'spreadmethod', 'startoffset', 'stddeviation', 'stitchtiles', 'stop-color', 'stop-opacity', 'stroke-dasharray', 'stroke-dashoffset', 'stroke-linecap', 'stroke-linejoin', 'stroke-miterlimit', 'stroke-opacity', 'stroke', 'stroke-width', 'style', 'surfacescale', 'systemlanguage', 'tabindex', 'targetx', 'targety', 'transform', 'transform-origin', 'text-anchor', 'text-decoration', 'text-rendering', 'textlength', 'type', 'u1', 'u2', 'unicode', 'values', 'viewbox', 'visibility', 'version', 'vert-adv-y', 'vert-origin-x', 'vert-origin-y', 'width', 'word-spacing', 'wrap', 'writing-mode', 'xchannelselector', 'ychannelselector', 'x', 'x1', 'x2', 'xmlns', 'y', 'y1', 'y2', 'z', 'zoomandpan']);
   var mathMl = freeze(['accent', 'accentunder', 'align', 'bevelled', 'close', 'columnsalign', 'columnlines', 'columnspan', 'denomalign', 'depth', 'dir', 'display', 'displaystyle', 'encoding', 'fence', 'frame', 'height', 'href', 'id', 'largeop', 'length', 'linethickness', 'lspace', 'lquote', 'mathbackground', 'mathcolor', 'mathsize', 'mathvariant', 'maxsize', 'minsize', 'movablelimits', 'notation', 'numalign', 'open', 'rowalign', 'rowlines', 'rowspacing', 'rowspan', 'rspace', 'rquote', 'scriptlevel', 'scriptminsize', 'scriptsizemultiplier', 'selection', 'separator', 'separators', 'stretchy', 'subscriptshift', 'supscriptshift', 'symmetric', 'voffset', 'width', 'xmlns']);
   var xml = freeze(['xlink:href', 'xml:id', 'xlink:title', 'xml:space', 'xmlns:xlink']);
 
   var MUSTACHE_EXPR = seal(/\{\{[\w\W]*|[\w\W]*\}\}/gm); // Specify template detection regex for SAFE_FOR_TEMPLATES mode
 
   var ERB_EXPR = seal(/<%[\w\W]*|[\w\W]*%>/gm);
   var TMPLIT_EXPR = seal(/\${[\w\W]*}/gm);
   var DATA_ATTR = seal(/^data-[\-\w.\u00B7-\uFFFF]/); // eslint-disable-line no-useless-escape
 
   var ARIA_ATTR = seal(/^aria-[\-\w]+$/); // eslint-disable-line no-useless-escape
 
   var IS_ALLOWED_URI = seal(/^(?:(?:(?:f|ht)tps?|mailto|tel|callto|cid|xmpp):|[^a-z]|[a-z+.\-]+(?:[^a-z+.\-:]|$))/i // eslint-disable-line no-useless-escape
   );
   var IS_SCRIPT_OR_DATA = seal(/^(?:\w+script|data):/i);
   var ATTR_WHITESPACE = seal(/[\u0000-\u0020\u00A0\u1680\u180E\u2000-\u2029\u205F\u3000]/g // eslint-disable-line no-control-regex
   );
   var DOCTYPE_NAME = seal(/^html$/i);
 
   var getGlobal = function getGlobal() {
     return typeof window === 'undefined' ? null : window;
   };
   /**
    * Creates a no-op policy for internal use only.
    * Don't export this function outside this module!
    * @param {?TrustedTypePolicyFactory} trustedTypes The policy factory.
    * @param {Document} document The document object (to determine policy name suffix)
    * @return {?TrustedTypePolicy} The policy created (or null, if Trusted Types
    * are not supported).
    */
 
 
   var _createTrustedTypesPolicy = function _createTrustedTypesPolicy(trustedTypes, document) {
     if (_typeof(trustedTypes) !== 'object' || typeof trustedTypes.createPolicy !== 'function') {
       return null;
     } // Allow the callers to control the unique policy name
     // by adding a data-tt-policy-suffix to the script element with the DOMPurify.
     // Policy creation with duplicate names throws in Trusted Types.
 
 
     var suffix = null;
     var ATTR_NAME = 'data-tt-policy-suffix';
 
     if (document.currentScript && document.currentScript.hasAttribute(ATTR_NAME)) {
       suffix = document.currentScript.getAttribute(ATTR_NAME);
     }
 
     var policyName = 'dompurify' + (suffix ? '#' + suffix : '');
 
     try {
       return trustedTypes.createPolicy(policyName, {
         createHTML: function createHTML(html) {
           return html;
         },
         createScriptURL: function createScriptURL(scriptUrl) {
           return scriptUrl;
         }
       });
     } catch (_) {
       // Policy creation failed (most likely another DOMPurify script has
       // already run). Skip creating the policy, as this will only cause errors
       // if TT are enforced.
       console.warn('TrustedTypes policy ' + policyName + ' could not be created.');
       return null;
     }
   };
 
   function createDOMPurify() {
     var window = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : getGlobal();
 
     var DOMPurify = function DOMPurify(root) {
       return createDOMPurify(root);
     };
     /**
      * Version label, exposed for easier checks
      * if DOMPurify is up to date or not
      */
 
 
     DOMPurify.version = '2.4.1';
     /**
      * Array of elements that DOMPurify removed during sanitation.
      * Empty if nothing was removed.
      */
 
     DOMPurify.removed = [];
 
     if (!window || !window.document || window.document.nodeType !== 9) {
       // Not running in a browser, provide a factory function
       // so that you can pass your own Window
       DOMPurify.isSupported = false;
       return DOMPurify;
     }
 
     var originalDocument = window.document;
     var document = window.document;
     var DocumentFragment = window.DocumentFragment,
         HTMLTemplateElement = window.HTMLTemplateElement,
         Node = window.Node,
         Element = window.Element,
         NodeFilter = window.NodeFilter,
         _window$NamedNodeMap = window.NamedNodeMap,
         NamedNodeMap = _window$NamedNodeMap === void 0 ? window.NamedNodeMap || window.MozNamedAttrMap : _window$NamedNodeMap,
         HTMLFormElement = window.HTMLFormElement,
         DOMParser = window.DOMParser,
         trustedTypes = window.trustedTypes;
     var ElementPrototype = Element.prototype;
     var cloneNode = lookupGetter(ElementPrototype, 'cloneNode');
     var getNextSibling = lookupGetter(ElementPrototype, 'nextSibling');
     var getChildNodes = lookupGetter(ElementPrototype, 'childNodes');
     var getParentNode = lookupGetter(ElementPrototype, 'parentNode'); // As per issue #47, the web-components registry is inherited by a
     // new document created via createHTMLDocument. As per the spec
     // (http://w3c.github.io/webcomponents/spec/custom/#creating-and-passing-registries)
     // a new empty registry is used when creating a template contents owner
     // document, so we use that as our parent document to ensure nothing
     // is inherited.
 
     if (typeof HTMLTemplateElement === 'function') {
       var template = document.createElement('template');
 
       if (template.content && template.content.ownerDocument) {
         document = template.content.ownerDocument;
       }
     }
 
     var trustedTypesPolicy = _createTrustedTypesPolicy(trustedTypes, originalDocument);
 
     var emptyHTML = trustedTypesPolicy ? trustedTypesPolicy.createHTML('') : '';
     var _document = document,
         implementation = _document.implementation,
         createNodeIterator = _document.createNodeIterator,
         createDocumentFragment = _document.createDocumentFragment,
         getElementsByTagName = _document.getElementsByTagName;
     var importNode = originalDocument.importNode;
     var documentMode = {};
 
     try {
       documentMode = clone(document).documentMode ? document.documentMode : {};
     } catch (_) {}
 
     var hooks = {};
     /**
      * Expose whether this browser supports running the full DOMPurify.
      */
 
     DOMPurify.isSupported = typeof getParentNode === 'function' && implementation && typeof implementation.createHTMLDocument !== 'undefined' && documentMode !== 9;
     var MUSTACHE_EXPR$1 = MUSTACHE_EXPR,
         ERB_EXPR$1 = ERB_EXPR,
         TMPLIT_EXPR$1 = TMPLIT_EXPR,
         DATA_ATTR$1 = DATA_ATTR,
         ARIA_ATTR$1 = ARIA_ATTR,
         IS_SCRIPT_OR_DATA$1 = IS_SCRIPT_OR_DATA,
         ATTR_WHITESPACE$1 = ATTR_WHITESPACE;
     var IS_ALLOWED_URI$1 = IS_ALLOWED_URI;
     /**
      * We consider the elements and attributes below to be safe. Ideally
      * don't add any new ones but feel free to remove unwanted ones.
      */
 
     /* allowed element names */
 
     var ALLOWED_TAGS = null;
     var DEFAULT_ALLOWED_TAGS = addToSet({}, [].concat(_toConsumableArray(html$1), _toConsumableArray(svg$1), _toConsumableArray(svgFilters), _toConsumableArray(mathMl$1), _toConsumableArray(text)));
     /* Allowed attribute names */
 
     var ALLOWED_ATTR = null;
     var DEFAULT_ALLOWED_ATTR = addToSet({}, [].concat(_toConsumableArray(html), _toConsumableArray(svg), _toConsumableArray(mathMl), _toConsumableArray(xml)));
     /*
      * Configure how DOMPUrify should handle custom elements and their attributes as well as customized built-in elements.
      * @property {RegExp|Function|null} tagNameCheck one of [null, regexPattern, predicate]. Default: `null` (disallow any custom elements)
      * @property {RegExp|Function|null} attributeNameCheck one of [null, regexPattern, predicate]. Default: `null` (disallow any attributes not on the allow list)
      * @property {boolean} allowCustomizedBuiltInElements allow custom elements derived from built-ins if they pass CUSTOM_ELEMENT_HANDLING.tagNameCheck. Default: `false`.
      */
 
     var CUSTOM_ELEMENT_HANDLING = Object.seal(Object.create(null, {
       tagNameCheck: {
         writable: true,
         configurable: false,
         enumerable: true,
         value: null
       },
       attributeNameCheck: {
         writable: true,
         configurable: false,
         enumerable: true,
         value: null
       },
       allowCustomizedBuiltInElements: {
         writable: true,
         configurable: false,
         enumerable: true,
         value: false
       }
     }));
     /* Explicitly forbidden tags (overrides ALLOWED_TAGS/ADD_TAGS) */
 
     var FORBID_TAGS = null;
     /* Explicitly forbidden attributes (overrides ALLOWED_ATTR/ADD_ATTR) */
 
     var FORBID_ATTR = null;
     /* Decide if ARIA attributes are okay */
 
     var ALLOW_ARIA_ATTR = true;
     /* Decide if custom data attributes are okay */
 
     var ALLOW_DATA_ATTR = true;
     /* Decide if unknown protocols are okay */
 
     var ALLOW_UNKNOWN_PROTOCOLS = false;
     /* Output should be safe for common template engines.
      * This means, DOMPurify removes data attributes, mustaches and ERB
      */
 
     var SAFE_FOR_TEMPLATES = false;
     /* Decide if document with <html>... should be returned */
 
     var WHOLE_DOCUMENT = false;
     /* Track whether config is already set on this instance of DOMPurify. */
 
     var SET_CONFIG = false;
     /* Decide if all elements (e.g. style, script) must be children of
      * document.body. By default, browsers might move them to document.head */
 
     var FORCE_BODY = false;
     /* Decide if a DOM `HTMLBodyElement` should be returned, instead of a html
      * string (or a TrustedHTML object if Trusted Types are supported).
      * If `WHOLE_DOCUMENT` is enabled a `HTMLHtmlElement` will be returned instead
      */
 
     var RETURN_DOM = false;
     /* Decide if a DOM `DocumentFragment` should be returned, instead of a html
      * string  (or a TrustedHTML object if Trusted Types are supported) */
 
     var RETURN_DOM_FRAGMENT = false;
     /* Try to return a Trusted Type object instead of a string, return a string in
      * case Trusted Types are not supported  */
 
     var RETURN_TRUSTED_TYPE = false;
     /* Output should be free from DOM clobbering attacks?
      * This sanitizes markups named with colliding, clobberable built-in DOM APIs.
      */
 
     var SANITIZE_DOM = true;
     /* Achieve full DOM Clobbering protection by isolating the namespace of named
      * properties and JS variables, mitigating attacks that abuse the HTML/DOM spec rules.
      *
      * HTML/DOM spec rules that enable DOM Clobbering:
      *   - Named Access on Window (§7.3.3)
      *   - DOM Tree Accessors (§3.1.5)
      *   - Form Element Parent-Child Relations (§4.10.3)
      *   - Iframe srcdoc / Nested WindowProxies (§4.8.5)
      *   - HTMLCollection (§4.2.10.2)
      *
      * Namespace isolation is implemented by prefixing `id` and `name` attributes
      * with a constant string, i.e., `user-content-`
      */
 
     var SANITIZE_NAMED_PROPS = false;
     var SANITIZE_NAMED_PROPS_PREFIX = 'user-content-';
     /* Keep element content when removing element? */
 
     var KEEP_CONTENT = true;
     /* If a `Node` is passed to sanitize(), then performs sanitization in-place instead
      * of importing it into a new Document and returning a sanitized copy */
 
     var IN_PLACE = false;
     /* Allow usage of profiles like html, svg and mathMl */
 
     var USE_PROFILES = {};
     /* Tags to ignore content of when KEEP_CONTENT is true */
 
     var FORBID_CONTENTS = null;
     var DEFAULT_FORBID_CONTENTS = addToSet({}, ['annotation-xml', 'audio', 'colgroup', 'desc', 'foreignobject', 'head', 'iframe', 'math', 'mi', 'mn', 'mo', 'ms', 'mtext', 'noembed', 'noframes', 'noscript', 'plaintext', 'script', 'style', 'svg', 'template', 'thead', 'title', 'video', 'xmp']);
     /* Tags that are safe for data: URIs */
 
     var DATA_URI_TAGS = null;
     var DEFAULT_DATA_URI_TAGS = addToSet({}, ['audio', 'video', 'img', 'source', 'image', 'track']);
     /* Attributes safe for values like "javascript:" */
 
     var URI_SAFE_ATTRIBUTES = null;
     var DEFAULT_URI_SAFE_ATTRIBUTES = addToSet({}, ['alt', 'class', 'for', 'id', 'label', 'name', 'pattern', 'placeholder', 'role', 'summary', 'title', 'value', 'style', 'xmlns']);
     var MATHML_NAMESPACE = 'http://www.w3.org/1998/Math/MathML';
     var SVG_NAMESPACE = 'http://www.w3.org/2000/svg';
     var HTML_NAMESPACE = 'http://www.w3.org/1999/xhtml';
     /* Document namespace */
 
     var NAMESPACE = HTML_NAMESPACE;
     var IS_EMPTY_INPUT = false;
     /* Allowed XHTML+XML namespaces */
 
     var ALLOWED_NAMESPACES = null;
     var DEFAULT_ALLOWED_NAMESPACES = addToSet({}, [MATHML_NAMESPACE, SVG_NAMESPACE, HTML_NAMESPACE], stringToString);
     /* Parsing of strict XHTML documents */
 
     var PARSER_MEDIA_TYPE;
     var SUPPORTED_PARSER_MEDIA_TYPES = ['application/xhtml+xml', 'text/html'];
     var DEFAULT_PARSER_MEDIA_TYPE = 'text/html';
     var transformCaseFunc;
     /* Keep a reference to config to pass to hooks */
 
     var CONFIG = null;
     /* Ideally, do not touch anything below this line */
 
     /* ______________________________________________ */
 
     var formElement = document.createElement('form');
 
     var isRegexOrFunction = function isRegexOrFunction(testValue) {
       return testValue instanceof RegExp || testValue instanceof Function;
     };
     /**
      * _parseConfig
      *
      * @param  {Object} cfg optional config literal
      */
     // eslint-disable-next-line complexity
 
 
     var _parseConfig = function _parseConfig(cfg) {
       if (CONFIG && CONFIG === cfg) {
         return;
       }
       /* Shield configuration object from tampering */
 
 
       if (!cfg || _typeof(cfg) !== 'object') {
         cfg = {};
       }
       /* Shield configuration object from prototype pollution */
 
 
       cfg = clone(cfg);
       PARSER_MEDIA_TYPE = // eslint-disable-next-line unicorn/prefer-includes
       SUPPORTED_PARSER_MEDIA_TYPES.indexOf(cfg.PARSER_MEDIA_TYPE) === -1 ? PARSER_MEDIA_TYPE = DEFAULT_PARSER_MEDIA_TYPE : PARSER_MEDIA_TYPE = cfg.PARSER_MEDIA_TYPE; // HTML tags and attributes are not case-sensitive, converting to lowercase. Keeping XHTML as is.
 
       transformCaseFunc = PARSER_MEDIA_TYPE === 'application/xhtml+xml' ? stringToString : stringToLowerCase;
       /* Set configuration parameters */
 
       ALLOWED_TAGS = 'ALLOWED_TAGS' in cfg ? addToSet({}, cfg.ALLOWED_TAGS, transformCaseFunc) : DEFAULT_ALLOWED_TAGS;
       ALLOWED_ATTR = 'ALLOWED_ATTR' in cfg ? addToSet({}, cfg.ALLOWED_ATTR, transformCaseFunc) : DEFAULT_ALLOWED_ATTR;
       ALLOWED_NAMESPACES = 'ALLOWED_NAMESPACES' in cfg ? addToSet({}, cfg.ALLOWED_NAMESPACES, stringToString) : DEFAULT_ALLOWED_NAMESPACES;
       URI_SAFE_ATTRIBUTES = 'ADD_URI_SAFE_ATTR' in cfg ? addToSet(clone(DEFAULT_URI_SAFE_ATTRIBUTES), // eslint-disable-line indent
       cfg.ADD_URI_SAFE_ATTR, // eslint-disable-line indent
       transformCaseFunc // eslint-disable-line indent
       ) // eslint-disable-line indent
       : DEFAULT_URI_SAFE_ATTRIBUTES;
       DATA_URI_TAGS = 'ADD_DATA_URI_TAGS' in cfg ? addToSet(clone(DEFAULT_DATA_URI_TAGS), // eslint-disable-line indent
       cfg.ADD_DATA_URI_TAGS, // eslint-disable-line indent
       transformCaseFunc // eslint-disable-line indent
       ) // eslint-disable-line indent
       : DEFAULT_DATA_URI_TAGS;
       FORBID_CONTENTS = 'FORBID_CONTENTS' in cfg ? addToSet({}, cfg.FORBID_CONTENTS, transformCaseFunc) : DEFAULT_FORBID_CONTENTS;
       FORBID_TAGS = 'FORBID_TAGS' in cfg ? addToSet({}, cfg.FORBID_TAGS, transformCaseFunc) : {};
       FORBID_ATTR = 'FORBID_ATTR' in cfg ? addToSet({}, cfg.FORBID_ATTR, transformCaseFunc) : {};
       USE_PROFILES = 'USE_PROFILES' in cfg ? cfg.USE_PROFILES : false;
       ALLOW_ARIA_ATTR = cfg.ALLOW_ARIA_ATTR !== false; // Default true
 
       ALLOW_DATA_ATTR = cfg.ALLOW_DATA_ATTR !== false; // Default true
 
       ALLOW_UNKNOWN_PROTOCOLS = cfg.ALLOW_UNKNOWN_PROTOCOLS || false; // Default false
 
       SAFE_FOR_TEMPLATES = cfg.SAFE_FOR_TEMPLATES || false; // Default false
 
       WHOLE_DOCUMENT = cfg.WHOLE_DOCUMENT || false; // Default false
 
       RETURN_DOM = cfg.RETURN_DOM || false; // Default false
 
       RETURN_DOM_FRAGMENT = cfg.RETURN_DOM_FRAGMENT || false; // Default false
 
       RETURN_TRUSTED_TYPE = cfg.RETURN_TRUSTED_TYPE || false; // Default false
 
       FORCE_BODY = cfg.FORCE_BODY || false; // Default false
 
       SANITIZE_DOM = cfg.SANITIZE_DOM !== false; // Default true
 
       SANITIZE_NAMED_PROPS = cfg.SANITIZE_NAMED_PROPS || false; // Default false
 
       KEEP_CONTENT = cfg.KEEP_CONTENT !== false; // Default true
 
       IN_PLACE = cfg.IN_PLACE || false; // Default false
 
       IS_ALLOWED_URI$1 = cfg.ALLOWED_URI_REGEXP || IS_ALLOWED_URI$1;
       NAMESPACE = cfg.NAMESPACE || HTML_NAMESPACE;
 
       if (cfg.CUSTOM_ELEMENT_HANDLING && isRegexOrFunction(cfg.CUSTOM_ELEMENT_HANDLING.tagNameCheck)) {
         CUSTOM_ELEMENT_HANDLING.tagNameCheck = cfg.CUSTOM_ELEMENT_HANDLING.tagNameCheck;
       }
 
       if (cfg.CUSTOM_ELEMENT_HANDLING && isRegexOrFunction(cfg.CUSTOM_ELEMENT_HANDLING.attributeNameCheck)) {
         CUSTOM_ELEMENT_HANDLING.attributeNameCheck = cfg.CUSTOM_ELEMENT_HANDLING.attributeNameCheck;
       }
 
       if (cfg.CUSTOM_ELEMENT_HANDLING && typeof cfg.CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements === 'boolean') {
         CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements = cfg.CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements;
       }
 
       if (SAFE_FOR_TEMPLATES) {
         ALLOW_DATA_ATTR = false;
       }
 
       if (RETURN_DOM_FRAGMENT) {
         RETURN_DOM = true;
       }
       /* Parse profile info */
 
 
       if (USE_PROFILES) {
         ALLOWED_TAGS = addToSet({}, _toConsumableArray(text));
         ALLOWED_ATTR = [];
 
         if (USE_PROFILES.html === true) {
           addToSet(ALLOWED_TAGS, html$1);
           addToSet(ALLOWED_ATTR, html);
         }
 
         if (USE_PROFILES.svg === true) {
           addToSet(ALLOWED_TAGS, svg$1);
           addToSet(ALLOWED_ATTR, svg);
           addToSet(ALLOWED_ATTR, xml);
         }
 
         if (USE_PROFILES.svgFilters === true) {
           addToSet(ALLOWED_TAGS, svgFilters);
           addToSet(ALLOWED_ATTR, svg);
           addToSet(ALLOWED_ATTR, xml);
         }
 
         if (USE_PROFILES.mathMl === true) {
           addToSet(ALLOWED_TAGS, mathMl$1);
           addToSet(ALLOWED_ATTR, mathMl);
           addToSet(ALLOWED_ATTR, xml);
         }
       }
       /* Merge configuration parameters */
 
 
       if (cfg.ADD_TAGS) {
         if (ALLOWED_TAGS === DEFAULT_ALLOWED_TAGS) {
           ALLOWED_TAGS = clone(ALLOWED_TAGS);
         }
 
         addToSet(ALLOWED_TAGS, cfg.ADD_TAGS, transformCaseFunc);
       }
 
       if (cfg.ADD_ATTR) {
         if (ALLOWED_ATTR === DEFAULT_ALLOWED_ATTR) {
           ALLOWED_ATTR = clone(ALLOWED_ATTR);
         }
 
         addToSet(ALLOWED_ATTR, cfg.ADD_ATTR, transformCaseFunc);
       }
 
       if (cfg.ADD_URI_SAFE_ATTR) {
         addToSet(URI_SAFE_ATTRIBUTES, cfg.ADD_URI_SAFE_ATTR, transformCaseFunc);
       }
 
       if (cfg.FORBID_CONTENTS) {
         if (FORBID_CONTENTS === DEFAULT_FORBID_CONTENTS) {
           FORBID_CONTENTS = clone(FORBID_CONTENTS);
         }
 
         addToSet(FORBID_CONTENTS, cfg.FORBID_CONTENTS, transformCaseFunc);
       }
       /* Add #text in case KEEP_CONTENT is set to true */
 
 
       if (KEEP_CONTENT) {
         ALLOWED_TAGS['#text'] = true;
       }
       /* Add html, head and body to ALLOWED_TAGS in case WHOLE_DOCUMENT is true */
 
 
       if (WHOLE_DOCUMENT) {
         addToSet(ALLOWED_TAGS, ['html', 'head', 'body']);
       }
       /* Add tbody to ALLOWED_TAGS in case tables are permitted, see #286, #365 */
 
 
       if (ALLOWED_TAGS.table) {
         addToSet(ALLOWED_TAGS, ['tbody']);
         delete FORBID_TAGS.tbody;
       } // Prevent further manipulation of configuration.
       // Not available in IE8, Safari 5, etc.
 
 
       if (freeze) {
         freeze(cfg);
       }
 
       CONFIG = cfg;
     };
 
     var MATHML_TEXT_INTEGRATION_POINTS = addToSet({}, ['mi', 'mo', 'mn', 'ms', 'mtext']);
     var HTML_INTEGRATION_POINTS = addToSet({}, ['foreignobject', 'desc', 'title', 'annotation-xml']); // Certain elements are allowed in both SVG and HTML
     // namespace. We need to specify them explicitly
     // so that they don't get erroneously deleted from
     // HTML namespace.
 
     var COMMON_SVG_AND_HTML_ELEMENTS = addToSet({}, ['title', 'style', 'font', 'a', 'script']);
     /* Keep track of all possible SVG and MathML tags
      * so that we can perform the namespace checks
      * correctly. */
 
     var ALL_SVG_TAGS = addToSet({}, svg$1);
     addToSet(ALL_SVG_TAGS, svgFilters);
     addToSet(ALL_SVG_TAGS, svgDisallowed);
     var ALL_MATHML_TAGS = addToSet({}, mathMl$1);
     addToSet(ALL_MATHML_TAGS, mathMlDisallowed);
     /**
      *
      *
      * @param  {Element} element a DOM element whose namespace is being checked
      * @returns {boolean} Return false if the element has a
      *  namespace that a spec-compliant parser would never
      *  return. Return true otherwise.
      */
 
     var _checkValidNamespace = function _checkValidNamespace(element) {
       var parent = getParentNode(element); // In JSDOM, if we're inside shadow DOM, then parentNode
       // can be null. We just simulate parent in this case.
 
       if (!parent || !parent.tagName) {
         parent = {
           namespaceURI: NAMESPACE,
           tagName: 'template'
         };
       }
 
       var tagName = stringToLowerCase(element.tagName);
       var parentTagName = stringToLowerCase(parent.tagName);
 
       if (!ALLOWED_NAMESPACES[element.namespaceURI]) {
         return false;
       }
 
       if (element.namespaceURI === SVG_NAMESPACE) {
         // The only way to switch from HTML namespace to SVG
         // is via <svg>. If it happens via any other tag, then
         // it should be killed.
         if (parent.namespaceURI === HTML_NAMESPACE) {
           return tagName === 'svg';
         } // The only way to switch from MathML to SVG is via`
         // svg if parent is either <annotation-xml> or MathML
         // text integration points.
 
 
         if (parent.namespaceURI === MATHML_NAMESPACE) {
           return tagName === 'svg' && (parentTagName === 'annotation-xml' || MATHML_TEXT_INTEGRATION_POINTS[parentTagName]);
         } // We only allow elements that are defined in SVG
         // spec. All others are disallowed in SVG namespace.
 
 
         return Boolean(ALL_SVG_TAGS[tagName]);
       }
 
       if (element.namespaceURI === MATHML_NAMESPACE) {
         // The only way to switch from HTML namespace to MathML
         // is via <math>. If it happens via any other tag, then
         // it should be killed.
         if (parent.namespaceURI === HTML_NAMESPACE) {
           return tagName === 'math';
         } // The only way to switch from SVG to MathML is via
         // <math> and HTML integration points
 
 
         if (parent.namespaceURI === SVG_NAMESPACE) {
           return tagName === 'math' && HTML_INTEGRATION_POINTS[parentTagName];
         } // We only allow elements that are defined in MathML
         // spec. All others are disallowed in MathML namespace.
 
 
         return Boolean(ALL_MATHML_TAGS[tagName]);
       }
 
       if (element.namespaceURI === HTML_NAMESPACE) {
         // The only way to switch from SVG to HTML is via
         // HTML integration points, and from MathML to HTML
         // is via MathML text integration points
         if (parent.namespaceURI === SVG_NAMESPACE && !HTML_INTEGRATION_POINTS[parentTagName]) {
           return false;
         }
 
         if (parent.namespaceURI === MATHML_NAMESPACE && !MATHML_TEXT_INTEGRATION_POINTS[parentTagName]) {
           return false;
         } // We disallow tags that are specific for MathML
         // or SVG and should never appear in HTML namespace
 
 
         return !ALL_MATHML_TAGS[tagName] && (COMMON_SVG_AND_HTML_ELEMENTS[tagName] || !ALL_SVG_TAGS[tagName]);
       } // For XHTML and XML documents that support custom namespaces
 
 
       if (PARSER_MEDIA_TYPE === 'application/xhtml+xml' && ALLOWED_NAMESPACES[element.namespaceURI]) {
         return true;
       } // The code should never reach this place (this means
       // that the element somehow got namespace that is not
       // HTML, SVG, MathML or allowed via ALLOWED_NAMESPACES).
       // Return false just in case.
 
 
       return false;
     };
     /**
      * _forceRemove
      *
      * @param  {Node} node a DOM node
      */
 
 
     var _forceRemove = function _forceRemove(node) {
       arrayPush(DOMPurify.removed, {
         element: node
       });
 
       try {
         // eslint-disable-next-line unicorn/prefer-dom-node-remove
         node.parentNode.removeChild(node);
       } catch (_) {
         try {
           node.outerHTML = emptyHTML;
         } catch (_) {
           node.remove();
         }
       }
     };
     /**
      * _removeAttribute
      *
      * @param  {String} name an Attribute name
      * @param  {Node} node a DOM node
      */
 
 
     var _removeAttribute = function _removeAttribute(name, node) {
       try {
         arrayPush(DOMPurify.removed, {
           attribute: node.getAttributeNode(name),
           from: node
         });
       } catch (_) {
         arrayPush(DOMPurify.removed, {
           attribute: null,
           from: node
         });
       }
 
       node.removeAttribute(name); // We void attribute values for unremovable "is"" attributes
 
       if (name === 'is' && !ALLOWED_ATTR[name]) {
         if (RETURN_DOM || RETURN_DOM_FRAGMENT) {
           try {
             _forceRemove(node);
           } catch (_) {}
         } else {
           try {
             node.setAttribute(name, '');
           } catch (_) {}
         }
       }
     };
     /**
      * _initDocument
      *
      * @param  {String} dirty a string of dirty markup
      * @return {Document} a DOM, filled with the dirty markup
      */
 
 
     var _initDocument = function _initDocument(dirty) {
       /* Create a HTML document */
       var doc;
       var leadingWhitespace;
 
       if (FORCE_BODY) {
         dirty = '<remove></remove>' + dirty;
       } else {
         /* If FORCE_BODY isn't used, leading whitespace needs to be preserved manually */
         var matches = stringMatch(dirty, /^[\r\n\t ]+/);
         leadingWhitespace = matches && matches[0];
       }
 
       if (PARSER_MEDIA_TYPE === 'application/xhtml+xml' && NAMESPACE === HTML_NAMESPACE) {
         // Root of XHTML doc must contain xmlns declaration (see https://www.w3.org/TR/xhtml1/normative.html#strict)
         dirty = '<html xmlns="http://www.w3.org/1999/xhtml"><head></head><body>' + dirty + '</body></html>';
       }
 
       var dirtyPayload = trustedTypesPolicy ? trustedTypesPolicy.createHTML(dirty) : dirty;
       /*
        * Use the DOMParser API by default, fallback later if needs be
        * DOMParser not work for svg when has multiple root element.
        */
 
       if (NAMESPACE === HTML_NAMESPACE) {
         try {
           doc = new DOMParser().parseFromString(dirtyPayload, PARSER_MEDIA_TYPE);
         } catch (_) {}
       }
       /* Use createHTMLDocument in case DOMParser is not available */
 
 
       if (!doc || !doc.documentElement) {
         doc = implementation.createDocument(NAMESPACE, 'template', null);
 
         try {
           doc.documentElement.innerHTML = IS_EMPTY_INPUT ? '' : dirtyPayload;
         } catch (_) {// Syntax error if dirtyPayload is invalid xml
         }
       }
 
       var body = doc.body || doc.documentElement;
 
       if (dirty && leadingWhitespace) {
         body.insertBefore(document.createTextNode(leadingWhitespace), body.childNodes[0] || null);
       }
       /* Work on whole document or just its body */
 
 
       if (NAMESPACE === HTML_NAMESPACE) {
         return getElementsByTagName.call(doc, WHOLE_DOCUMENT ? 'html' : 'body')[0];
       }
 
       return WHOLE_DOCUMENT ? doc.documentElement : body;
     };
     /**
      * _createIterator
      *
      * @param  {Document} root document/fragment to create iterator for
      * @return {Iterator} iterator instance
      */
 
 
     var _createIterator = function _createIterator(root) {
       return createNodeIterator.call(root.ownerDocument || root, root, // eslint-disable-next-line no-bitwise
       NodeFilter.SHOW_ELEMENT | NodeFilter.SHOW_COMMENT | NodeFilter.SHOW_TEXT, null, false);
     };
     /**
      * _isClobbered
      *
      * @param  {Node} elm element to check for clobbering attacks
      * @return {Boolean} true if clobbered, false if safe
      */
 
 
     var _isClobbered = function _isClobbered(elm) {
       return elm instanceof HTMLFormElement && (typeof elm.nodeName !== 'string' || typeof elm.textContent !== 'string' || typeof elm.removeChild !== 'function' || !(elm.attributes instanceof NamedNodeMap) || typeof elm.removeAttribute !== 'function' || typeof elm.setAttribute !== 'function' || typeof elm.namespaceURI !== 'string' || typeof elm.insertBefore !== 'function' || typeof elm.hasChildNodes !== 'function');
     };
     /**
      * _isNode
      *
      * @param  {Node} obj object to check whether it's a DOM node
      * @return {Boolean} true is object is a DOM node
      */
 
 
     var _isNode = function _isNode(object) {
       return _typeof(Node) === 'object' ? object instanceof Node : object && _typeof(object) === 'object' && typeof object.nodeType === 'number' && typeof object.nodeName === 'string';
     };
     /**
      * _executeHook
      * Execute user configurable hooks
      *
      * @param  {String} entryPoint  Name of the hook's entry point
      * @param  {Node} currentNode node to work on with the hook
      * @param  {Object} data additional hook parameters
      */
 
 
     var _executeHook = function _executeHook(entryPoint, currentNode, data) {
       if (!hooks[entryPoint]) {
         return;
       }
 
       arrayForEach(hooks[entryPoint], function (hook) {
         hook.call(DOMPurify, currentNode, data, CONFIG);
       });
     };
     /**
      * _sanitizeElements
      *
      * @protect nodeName
      * @protect textContent
      * @protect removeChild
      *
      * @param   {Node} currentNode to check for permission to exist
      * @return  {Boolean} true if node was killed, false if left alive
      */
 
 
     var _sanitizeElements = function _sanitizeElements(currentNode) {
       var content;
       /* Execute a hook if present */
 
       _executeHook('beforeSanitizeElements', currentNode, null);
       /* Check if element is clobbered or can clobber */
 
 
       if (_isClobbered(currentNode)) {
         _forceRemove(currentNode);
 
         return true;
       }
       /* Check if tagname contains Unicode */
 
 
       if (regExpTest(/[\u0080-\uFFFF]/, currentNode.nodeName)) {
         _forceRemove(currentNode);
 
         return true;
       }
       /* Now let's check the element's type and name */
 
 
       var tagName = transformCaseFunc(currentNode.nodeName);
       /* Execute a hook if present */
 
       _executeHook('uponSanitizeElement', currentNode, {
         tagName: tagName,
         allowedTags: ALLOWED_TAGS
       });
       /* Detect mXSS attempts abusing namespace confusion */
 
 
       if (currentNode.hasChildNodes() && !_isNode(currentNode.firstElementChild) && (!_isNode(currentNode.content) || !_isNode(currentNode.content.firstElementChild)) && regExpTest(/<[/\w]/g, currentNode.innerHTML) && regExpTest(/<[/\w]/g, currentNode.textContent)) {
         _forceRemove(currentNode);
 
         return true;
       }
       /* Mitigate a problem with templates inside select */
 
 
       if (tagName === 'select' && regExpTest(/<template/i, currentNode.innerHTML)) {
         _forceRemove(currentNode);
 
         return true;
       }
       /* Remove element if anything forbids its presence */
 
 
       if (!ALLOWED_TAGS[tagName] || FORBID_TAGS[tagName]) {
         /* Check if we have a custom element to handle */
         if (!FORBID_TAGS[tagName] && _basicCustomElementTest(tagName)) {
           if (CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof RegExp && regExpTest(CUSTOM_ELEMENT_HANDLING.tagNameCheck, tagName)) return false;
           if (CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof Function && CUSTOM_ELEMENT_HANDLING.tagNameCheck(tagName)) return false;
         }
         /* Keep content except for bad-listed elements */
 
 
         if (KEEP_CONTENT && !FORBID_CONTENTS[tagName]) {
           var parentNode = getParentNode(currentNode) || currentNode.parentNode;
           var childNodes = getChildNodes(currentNode) || currentNode.childNodes;
 
           if (childNodes && parentNode) {
             var childCount = childNodes.length;
 
             for (var i = childCount - 1; i >= 0; --i) {
               parentNode.insertBefore(cloneNode(childNodes[i], true), getNextSibling(currentNode));
             }
           }
         }
 
         _forceRemove(currentNode);
 
         return true;
       }
       /* Check whether element has a valid namespace */
 
 
       if (currentNode instanceof Element && !_checkValidNamespace(currentNode)) {
         _forceRemove(currentNode);
 
         return true;
       }
 
       if ((tagName === 'noscript' || tagName === 'noembed') && regExpTest(/<\/no(script|embed)/i, currentNode.innerHTML)) {
         _forceRemove(currentNode);
 
         return true;
       }
       /* Sanitize element content to be template-safe */
 
 
       if (SAFE_FOR_TEMPLATES && currentNode.nodeType === 3) {
         /* Get the element's text content */
         content = currentNode.textContent;
         content = stringReplace(content, MUSTACHE_EXPR$1, ' ');
         content = stringReplace(content, ERB_EXPR$1, ' ');
         content = stringReplace(content, TMPLIT_EXPR$1, ' ');
 
         if (currentNode.textContent !== content) {
           arrayPush(DOMPurify.removed, {
             element: currentNode.cloneNode()
           });
           currentNode.textContent = content;
         }
       }
       /* Execute a hook if present */
 
 
       _executeHook('afterSanitizeElements', currentNode, null);
 
       return false;
     };
     /**
      * _isValidAttribute
      *
      * @param  {string} lcTag Lowercase tag name of containing element.
      * @param  {string} lcName Lowercase attribute name.
      * @param  {string} value Attribute value.
      * @return {Boolean} Returns true if `value` is valid, otherwise false.
      */
     // eslint-disable-next-line complexity
 
 
     var _isValidAttribute = function _isValidAttribute(lcTag, lcName, value) {
       /* Make sure attribute cannot clobber */
       if (SANITIZE_DOM && (lcName === 'id' || lcName === 'name') && (value in document || value in formElement)) {
         return false;
       }
       /* Allow valid data-* attributes: At least one character after "-"
           (https://html.spec.whatwg.org/multipage/dom.html#embedding-custom-non-visible-data-with-the-data-*-attributes)
           XML-compatible (https://html.spec.whatwg.org/multipage/infrastructure.html#xml-compatible and http://www.w3.org/TR/xml/#d0e804)
           We don't need to check the value; it's always URI safe. */
 
 
       if (ALLOW_DATA_ATTR && !FORBID_ATTR[lcName] && regExpTest(DATA_ATTR$1, lcName)) ; else if (ALLOW_ARIA_ATTR && regExpTest(ARIA_ATTR$1, lcName)) ; else if (!ALLOWED_ATTR[lcName] || FORBID_ATTR[lcName]) {
         if ( // First condition does a very basic check if a) it's basically a valid custom element tagname AND
         // b) if the tagName passes whatever the user has configured for CUSTOM_ELEMENT_HANDLING.tagNameCheck
         // and c) if the attribute name passes whatever the user has configured for CUSTOM_ELEMENT_HANDLING.attributeNameCheck
         _basicCustomElementTest(lcTag) && (CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof RegExp && regExpTest(CUSTOM_ELEMENT_HANDLING.tagNameCheck, lcTag) || CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof Function && CUSTOM_ELEMENT_HANDLING.tagNameCheck(lcTag)) && (CUSTOM_ELEMENT_HANDLING.attributeNameCheck instanceof RegExp && regExpTest(CUSTOM_ELEMENT_HANDLING.attributeNameCheck, lcName) || CUSTOM_ELEMENT_HANDLING.attributeNameCheck instanceof Function && CUSTOM_ELEMENT_HANDLING.attributeNameCheck(lcName)) || // Alternative, second condition checks if it's an `is`-attribute, AND
         // the value passes whatever the user has configured for CUSTOM_ELEMENT_HANDLING.tagNameCheck
         lcName === 'is' && CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements && (CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof RegExp && regExpTest(CUSTOM_ELEMENT_HANDLING.tagNameCheck, value) || CUSTOM_ELEMENT_HANDLING.tagNameCheck instanceof Function && CUSTOM_ELEMENT_HANDLING.tagNameCheck(value))) ; else {
           return false;
         }
         /* Check value is safe. First, is attr inert? If so, is safe */
 
       } else if (URI_SAFE_ATTRIBUTES[lcName]) ; else if (regExpTest(IS_ALLOWED_URI$1, stringReplace(value, ATTR_WHITESPACE$1, ''))) ; else if ((lcName === 'src' || lcName === 'xlink:href' || lcName === 'href') && lcTag !== 'script' && stringIndexOf(value, 'data:') === 0 && DATA_URI_TAGS[lcTag]) ; else if (ALLOW_UNKNOWN_PROTOCOLS && !regExpTest(IS_SCRIPT_OR_DATA$1, stringReplace(value, ATTR_WHITESPACE$1, ''))) ; else if (!value) ; else {
         return false;
       }
 
       return true;
     };
     /**
      * _basicCustomElementCheck
      * checks if at least one dash is included in tagName, and it's not the first char
      * for more sophisticated checking see https://github.com/sindresorhus/validate-element-name
      * @param {string} tagName name of the tag of the node to sanitize
      */
 
 
     var _basicCustomElementTest = function _basicCustomElementTest(tagName) {
       return tagName.indexOf('-') > 0;
     };
     /**
      * _sanitizeAttributes
      *
      * @protect attributes
      * @protect nodeName
      * @protect removeAttribute
      * @protect setAttribute
      *
      * @param  {Node} currentNode to sanitize
      */
 
 
     var _sanitizeAttributes = function _sanitizeAttributes(currentNode) {
       var attr;
       var value;
       var lcName;
       var l;
       /* Execute a hook if present */
 
       _executeHook('beforeSanitizeAttributes', currentNode, null);
 
       var attributes = currentNode.attributes;
       /* Check if we have attributes; if not we might have a text node */
 
       if (!attributes) {
         return;
       }
 
       var hookEvent = {
         attrName: '',
         attrValue: '',
         keepAttr: true,
         allowedAttributes: ALLOWED_ATTR
       };
       l = attributes.length;
       /* Go backwards over all attributes; safely remove bad ones */
 
       while (l--) {
         attr = attributes[l];
         var _attr = attr,
             name = _attr.name,
             namespaceURI = _attr.namespaceURI;
         value = name === 'value' ? attr.value : stringTrim(attr.value);
         lcName = transformCaseFunc(name);
         /* Execute a hook if present */
 
         hookEvent.attrName = lcName;
         hookEvent.attrValue = value;
         hookEvent.keepAttr = true;
         hookEvent.forceKeepAttr = undefined; // Allows developers to see this is a property they can set
 
         _executeHook('uponSanitizeAttribute', currentNode, hookEvent);
 
         value = hookEvent.attrValue;
         /* Did the hooks approve of the attribute? */
 
         if (hookEvent.forceKeepAttr) {
           continue;
         }
         /* Remove attribute */
 
 
         _removeAttribute(name, currentNode);
         /* Did the hooks approve of the attribute? */
 
 
         if (!hookEvent.keepAttr) {
           continue;
         }
         /* Work around a security issue in jQuery 3.0 */
 
 
         if (regExpTest(/\/>/i, value)) {
           _removeAttribute(name, currentNode);
 
           continue;
         }
         /* Sanitize attribute content to be template-safe */
 
 
         if (SAFE_FOR_TEMPLATES) {
           value = stringReplace(value, MUSTACHE_EXPR$1, ' ');
           value = stringReplace(value, ERB_EXPR$1, ' ');
           value = stringReplace(value, TMPLIT_EXPR$1, ' ');
         }
         /* Is `value` valid for this attribute? */
 
 
         var lcTag = transformCaseFunc(currentNode.nodeName);
 
         if (!_isValidAttribute(lcTag, lcName, value)) {
           continue;
         }
         /* Full DOM Clobbering protection via namespace isolation,
          * Prefix id and name attributes with `user-content-`
          */
 
 
         if (SANITIZE_NAMED_PROPS && (lcName === 'id' || lcName === 'name')) {
           // Remove the attribute with this value
           _removeAttribute(name, currentNode); // Prefix the value and later re-create the attribute with the sanitized value
 
 
           value = SANITIZE_NAMED_PROPS_PREFIX + value;
         }
         /* Handle attributes that require Trusted Types */
 
 
         if (trustedTypesPolicy && _typeof(trustedTypes) === 'object' && typeof trustedTypes.getAttributeType === 'function') {
           if (namespaceURI) ; else {
             switch (trustedTypes.getAttributeType(lcTag, lcName)) {
               case 'TrustedHTML':
                 value = trustedTypesPolicy.createHTML(value);
                 break;
 
               case 'TrustedScriptURL':
                 value = trustedTypesPolicy.createScriptURL(value);
                 break;
             }
           }
         }
         /* Handle invalid data-* attribute set by try-catching it */
 
 
         try {
           if (namespaceURI) {
             currentNode.setAttributeNS(namespaceURI, name, value);
           } else {
             /* Fallback to setAttribute() for browser-unrecognized namespaces e.g. "x-schema". */
             currentNode.setAttribute(name, value);
           }
 
           arrayPop(DOMPurify.removed);
         } catch (_) {}
       }
       /* Execute a hook if present */
 
 
       _executeHook('afterSanitizeAttributes', currentNode, null);
     };
     /**
      * _sanitizeShadowDOM
      *
      * @param  {DocumentFragment} fragment to iterate over recursively
      */
 
 
     var _sanitizeShadowDOM = function _sanitizeShadowDOM(fragment) {
       var shadowNode;
 
       var shadowIterator = _createIterator(fragment);
       /* Execute a hook if present */
 
 
       _executeHook('beforeSanitizeShadowDOM', fragment, null);
 
       while (shadowNode = shadowIterator.nextNode()) {
         /* Execute a hook if present */
         _executeHook('uponSanitizeShadowNode', shadowNode, null);
         /* Sanitize tags and elements */
 
 
         if (_sanitizeElements(shadowNode)) {
           continue;
         }
         /* Deep shadow DOM detected */
 
 
         if (shadowNode.content instanceof DocumentFragment) {
           _sanitizeShadowDOM(shadowNode.content);
         }
         /* Check attributes, sanitize if necessary */
 
 
         _sanitizeAttributes(shadowNode);
       }
       /* Execute a hook if present */
 
 
       _executeHook('afterSanitizeShadowDOM', fragment, null);
     };
     /**
      * Sanitize
      * Public method providing core sanitation functionality
      *
      * @param {String|Node} dirty string or DOM node
      * @param {Object} configuration object
      */
     // eslint-disable-next-line complexity
 
 
     DOMPurify.sanitize = function (dirty) {
       var cfg = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
       var body;
       var importedNode;
       var currentNode;
       var oldNode;
       var returnNode;
       /* Make sure we have a string to sanitize.
         DO NOT return early, as this will return the wrong type if
         the user has requested a DOM object rather than a string */
 
       IS_EMPTY_INPUT = !dirty;
 
       if (IS_EMPTY_INPUT) {
         dirty = '<!-->';
       }
       /* Stringify, in case dirty is an object */
 
 
       if (typeof dirty !== 'string' && !_isNode(dirty)) {
         // eslint-disable-next-line no-negated-condition
         if (typeof dirty.toString !== 'function') {
           throw typeErrorCreate('toString is not a function');
         } else {
           dirty = dirty.toString();
 
           if (typeof dirty !== 'string') {
             throw typeErrorCreate('dirty is not a string, aborting');
           }
         }
       }
       /* Check we can run. Otherwise fall back or ignore */
 
 
       if (!DOMPurify.isSupported) {
         if (_typeof(window.toStaticHTML) === 'object' || typeof window.toStaticHTML === 'function') {
           if (typeof dirty === 'string') {
             return window.toStaticHTML(dirty);
           }
 
           if (_isNode(dirty)) {
             return window.toStaticHTML(dirty.outerHTML);
           }
         }
 
         return dirty;
       }
       /* Assign config vars */
 
 
       if (!SET_CONFIG) {
         _parseConfig(cfg);
       }
       /* Clean up removed elements */
 
 
       DOMPurify.removed = [];
       /* Check if dirty is correctly typed for IN_PLACE */
 
       if (typeof dirty === 'string') {
         IN_PLACE = false;
       }
 
       if (IN_PLACE) {
         /* Do some early pre-sanitization to avoid unsafe root nodes */
         if (dirty.nodeName) {
           var tagName = transformCaseFunc(dirty.nodeName);
 
           if (!ALLOWED_TAGS[tagName] || FORBID_TAGS[tagName]) {
             throw typeErrorCreate('root node is forbidden and cannot be sanitized in-place');
           }
         }
       } else if (dirty instanceof Node) {
         /* If dirty is a DOM element, append to an empty document to avoid
            elements being stripped by the parser */
         body = _initDocument('<!---->');
         importedNode = body.ownerDocument.importNode(dirty, true);
 
         if (importedNode.nodeType === 1 && importedNode.nodeName === 'BODY') {
           /* Node is already a body, use as is */
           body = importedNode;
         } else if (importedNode.nodeName === 'HTML') {
           body = importedNode;
         } else {
           // eslint-disable-next-line unicorn/prefer-dom-node-append
           body.appendChild(importedNode);
         }
       } else {
         /* Exit directly if we have nothing to do */
         if (!RETURN_DOM && !SAFE_FOR_TEMPLATES && !WHOLE_DOCUMENT && // eslint-disable-next-line unicorn/prefer-includes
         dirty.indexOf('<') === -1) {
           return trustedTypesPolicy && RETURN_TRUSTED_TYPE ? trustedTypesPolicy.createHTML(dirty) : dirty;
         }
         /* Initialize the document to work on */
 
 
         body = _initDocument(dirty);
         /* Check we have a DOM node from the data */
 
         if (!body) {
           return RETURN_DOM ? null : RETURN_TRUSTED_TYPE ? emptyHTML : '';
         }
       }
       /* Remove first element node (ours) if FORCE_BODY is set */
 
 
       if (body && FORCE_BODY) {
         _forceRemove(body.firstChild);
       }
       /* Get node iterator */
 
 
       var nodeIterator = _createIterator(IN_PLACE ? dirty : body);
       /* Now start iterating over the created document */
 
 
       while (currentNode = nodeIterator.nextNode()) {
         /* Fix IE's strange behavior with manipulated textNodes #89 */
         if (currentNode.nodeType === 3 && currentNode === oldNode) {
           continue;
         }
         /* Sanitize tags and elements */
 
 
         if (_sanitizeElements(currentNode)) {
           continue;
         }
         /* Shadow DOM detected, sanitize it */
 
 
         if (currentNode.content instanceof DocumentFragment) {
           _sanitizeShadowDOM(currentNode.content);
         }
         /* Check attributes, sanitize if necessary */
 
 
         _sanitizeAttributes(currentNode);
 
         oldNode = currentNode;
       }
 
       oldNode = null;
       /* If we sanitized `dirty` in-place, return it. */
 
       if (IN_PLACE) {
         return dirty;
       }
       /* Return sanitized string or DOM */
 
 
       if (RETURN_DOM) {
         if (RETURN_DOM_FRAGMENT) {
           returnNode = createDocumentFragment.call(body.ownerDocument);
 
           while (body.firstChild) {
             // eslint-disable-next-line unicorn/prefer-dom-node-append
             returnNode.appendChild(body.firstChild);
           }
         } else {
           returnNode = body;
         }
 
         if (ALLOWED_ATTR.shadowroot) {
           /*
             AdoptNode() is not used because internal state is not reset
             (e.g. the past names map of a HTMLFormElement), this is safe
             in theory but we would rather not risk another attack vector.
             The state that is cloned by importNode() is explicitly defined
             by the specs.
           */
           returnNode = importNode.call(originalDocument, returnNode, true);
         }
 
         return returnNode;
       }
 
       var serializedHTML = WHOLE_DOCUMENT ? body.outerHTML : body.innerHTML;
       /* Serialize doctype if allowed */
 
       if (WHOLE_DOCUMENT && ALLOWED_TAGS['!doctype'] && body.ownerDocument && body.ownerDocument.doctype && body.ownerDocument.doctype.name && regExpTest(DOCTYPE_NAME, body.ownerDocument.doctype.name)) {
         serializedHTML = '<!DOCTYPE ' + body.ownerDocument.doctype.name + '>\n' + serializedHTML;
       }
       /* Sanitize final string template-safe */
 
 
       if (SAFE_FOR_TEMPLATES) {
         serializedHTML = stringReplace(serializedHTML, MUSTACHE_EXPR$1, ' ');
         serializedHTML = stringReplace(serializedHTML, ERB_EXPR$1, ' ');
         serializedHTML = stringReplace(serializedHTML, TMPLIT_EXPR$1, ' ');
       }
 
       return trustedTypesPolicy && RETURN_TRUSTED_TYPE ? trustedTypesPolicy.createHTML(serializedHTML) : serializedHTML;
     };
     /**
      * Public method to set the configuration once
      * setConfig
      *
      * @param {Object} cfg configuration object
      */
 
 
     DOMPurify.setConfig = function (cfg) {
       _parseConfig(cfg);
 
       SET_CONFIG = true;
     };
     /**
      * Public method to remove the configuration
      * clearConfig
      *
      */
 
 
     DOMPurify.clearConfig = function () {
       CONFIG = null;
       SET_CONFIG = false;
     };
     /**
      * Public method to check if an attribute value is valid.
      * Uses last set config, if any. Otherwise, uses config defaults.
      * isValidAttribute
      *
      * @param  {string} tag Tag name of containing element.
      * @param  {string} attr Attribute name.
      * @param  {string} value Attribute value.
      * @return {Boolean} Returns true if `value` is valid. Otherwise, returns false.
      */
 
 
     DOMPurify.isValidAttribute = function (tag, attr, value) {
       /* Initialize shared config vars if necessary. */
       if (!CONFIG) {
         _parseConfig({});
       }
 
       var lcTag = transformCaseFunc(tag);
       var lcName = transformCaseFunc(attr);
       return _isValidAttribute(lcTag, lcName, value);
     };
     /**
      * AddHook
      * Public method to add DOMPurify hooks
      *
      * @param {String} entryPoint entry point for the hook to add
      * @param {Function} hookFunction function to execute
      */
 
 
     DOMPurify.addHook = function (entryPoint, hookFunction) {
       if (typeof hookFunction !== 'function') {
         return;
       }
 
       hooks[entryPoint] = hooks[entryPoint] || [];
       arrayPush(hooks[entryPoint], hookFunction);
     };
     /**
      * RemoveHook
      * Public method to remove a DOMPurify hook at a given entryPoint
      * (pops it from the stack of hooks if more are present)
      *
      * @param {String} entryPoint entry point for the hook to remove
      * @return {Function} removed(popped) hook
      */
 
 
     DOMPurify.removeHook = function (entryPoint) {
       if (hooks[entryPoint]) {
         return arrayPop(hooks[entryPoint]);
       }
     };
     /**
      * RemoveHooks
      * Public method to remove all DOMPurify hooks at a given entryPoint
      *
      * @param  {String} entryPoint entry point for the hooks to remove
      */
 
 
     DOMPurify.removeHooks = function (entryPoint) {
       if (hooks[entryPoint]) {
         hooks[entryPoint] = [];
       }
     };
     /**
      * RemoveAllHooks
      * Public method to remove all DOMPurify hooks
      *
      */
 
 
     DOMPurify.removeAllHooks = function () {
       hooks = {};
     };
 
     return DOMPurify;
   }
 
   var purify = createDOMPurify();
 
   return purify;
 
 }));
 //# sourceMappingURL=purify.js.map