Description: Update DOMPurify to 2.5.7
Origin: backport, https://gerrit.wikimedia.org/r/c/VisualEditor/VisualEditor/+/1082561
Bug: https://phabricator.wikimedia.org/T377905
Bug-Debian: https://bugs.debian.org/1085453
Applied-Upstream: 7a373467ce93d23297846e66fff5bc9419f87cce
Last-Update: 2025-04-04
---
This patch header follows DEP-3: http://dep.debian.net/deps/dep3/
--- a/extensions/VisualEditor/lib/ve/lib/dompurify/purify.js
+++ b/extensions/VisualEditor/lib/ve/lib/dompurify/purify.js
@@ -1,4 +1,4 @@
-/*! @license DOMPurify 2.4.4 | (c) Cure53 and other contributors | Released under the Apache license 2.0 and Mozilla Public License 2.0 | github.com/cure53/DOMPurify/blob/2.4.4/LICENSE */
+/*! @license DOMPurify 2.5.7 | (c) Cure53 and other contributors | Released under the Apache license 2.0 and Mozilla Public License 2.0 | github.com/cure53/DOMPurify/blob/2.5.7/LICENSE */
 
 (function (global, factory) {
   typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
@@ -15,21 +15,17 @@
       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;
@@ -37,7 +33,6 @@
       return false;
     }
   }
-
   function _construct(Parent, args, Class) {
     if (_isNativeReflectConstruct()) {
       _construct = Reflect.construct;
@@ -51,22 +46,17 @@
         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);
@@ -75,56 +65,46 @@
     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;
+    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
-
+    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;
-
+    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);
@@ -141,7 +121,6 @@
       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);
     };
   }
@@ -150,101 +129,89 @@
       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 */
 
+  /* Add properties to a lookup table */
   function addToSet(set, array, transformCaseFunc) {
-    transformCaseFunc = transformCaseFunc ? transformCaseFunc : stringToLowerCase;
-
+    var _transformCaseFunc;
+    transformCaseFunc = (_transformCaseFunc = transformCaseFunc) !== null && _transformCaseFunc !== void 0 ? _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 */
 
+  /* Shallow clone an object */
   function clone(object) {
     var newObject = create(null);
     var property;
-
     for (property in object) {
       if (apply(hasOwnProperty, object, [property]) === true) {
         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 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.
+  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 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']);
 
@@ -253,24 +220,24 @@
   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']);
 
+  // eslint-disable-next-line unicorn/better-regex
   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$/i);
+  var CUSTOM_ELEMENT = seal(/^[a-z][.\w]*(-[.\w]+)+$/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!
@@ -279,25 +246,20 @@
    * @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
+    }
+
+    // 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) {
@@ -315,114 +277,106 @@
       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 = '2.5.7';
 
-
-    DOMPurify.version = '2.4.4';
     /**
      * 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$NamedNodeMap,
-        HTMLFormElement = window.HTMLFormElement,
-        DOMParser = window.DOMParser,
-        trustedTypes = window.trustedTypes;
+      HTMLTemplateElement = window.HTMLTemplateElement,
+      Node = window.Node,
+      Element = window.Element,
+      NodeFilter = window.NodeFilter,
+      _window$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
+    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;
+      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;
+    DOMPurify.isSupported = typeof getParentNode === 'function' && implementation && 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;
+      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,
+      CUSTOM_ELEMENT$1 = CUSTOM_ELEMENT;
     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 */
 
+    /* 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,
@@ -443,59 +397,65 @@
         value: false
       }
     }));
-    /* Explicitly forbidden tags (overrides ALLOWED_TAGS/ADD_TAGS) */
 
+    /* Explicitly forbidden tags (overrides ALLOWED_TAGS/ADD_TAGS) */
     var FORBID_TAGS = null;
-    /* Explicitly forbidden attributes (overrides ALLOWED_ATTR/ADD_ATTR) */
 
+    /* Explicitly forbidden attributes (overrides ALLOWED_ATTR/ADD_ATTR) */
     var FORBID_ATTR = null;
-    /* Decide if ARIA attributes are okay */
 
+    /* Decide if ARIA attributes are okay */
     var ALLOW_ARIA_ATTR = true;
-    /* Decide if custom data attributes are okay */
 
+    /* Decide if custom data attributes are okay */
     var ALLOW_DATA_ATTR = true;
-    /* Decide if unknown protocols are okay */
 
+    /* Decide if unknown protocols are okay */
     var ALLOW_UNKNOWN_PROTOCOLS = false;
+
     /* Decide if self-closing tags in attributes are allowed.
      * Usually removed due to a mXSS issue in jQuery 3.0 */
-
     var ALLOW_SELF_CLOSE_IN_ATTR = true;
+
     /* 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 */
 
+    /* Output should be safe even for XML used within HTML and alike.
+     * This means, DOMPurify removes comments when containing risky content.
+     */
+    var SAFE_FOR_XML = true;
+
+    /* Decide if document with <html>... should be returned */
     var WHOLE_DOCUMENT = false;
-    /* Track whether config is already set on this instance of DOMPurify. */
 
+    /* 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.
      *
@@ -509,98 +469,98 @@
      * 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? */
 
+    /* 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 */
 
+    /* Allow usage of profiles like html, svg and mathMl */
     var USE_PROFILES = {};
-    /* Tags to ignore content of when KEEP_CONTENT is true */
 
+    /* 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 */
 
+    /* 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:" */
 
+    /* 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 */
 
+    /* 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 */
 
+    /* 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 */
 
+    /* Keep a reference to config to pass to hooks */
     var CONFIG = null;
-    /* Ideally, do not touch anything below this line */
 
+    /* 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 */
-
 
+      /* Shield configuration object from tampering */
       if (!cfg || _typeof(cfg) !== 'object') {
         cfg = {};
       }
-      /* Shield configuration object from prototype pollution */
-
 
+      /* 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.
+      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 */
 
+      /* 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
+      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
+      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;
@@ -609,160 +569,128 @@
       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
-
       ALLOW_SELF_CLOSE_IN_ATTR = cfg.ALLOW_SELF_CLOSE_IN_ATTR !== false; // Default true
-
       SAFE_FOR_TEMPLATES = cfg.SAFE_FOR_TEMPLATES || false; // Default false
-
+      SAFE_FOR_XML = cfg.SAFE_FOR_XML !== false; // Default true
       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;
-
+      CUSTOM_ELEMENT_HANDLING = cfg.CUSTOM_ELEMENT_HANDLING || {};
       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 */
-
 
+      /* 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 */
-
 
+      /* 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 */
-
 
+      /* 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 */
-
 
+      /* 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 */
-
 
+      /* 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.
-
+      }
 
+      // 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
+    var HTML_INTEGRATION_POINTS = addToSet({}, ['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);
+
     /**
      *
      *
@@ -771,64 +699,59 @@
      *  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.
+      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`
+        }
+
+        // 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.
-
+        }
 
+        // 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
-
+        }
 
+        // 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.
-
+        }
 
+        // 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
@@ -836,39 +759,36 @@
         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
-
+        }
 
+        // 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
-
+      }
 
+      // 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
+      }
+
+      // 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);
@@ -880,14 +800,13 @@
         }
       }
     };
+
     /**
      * _removeAttribute
      *
      * @param  {String} name an Attribute name
      * @param  {Node} node a DOM node
      */
-
-
     var _removeAttribute = function _removeAttribute(name, node) {
       try {
         arrayPush(DOMPurify.removed, {
@@ -900,9 +819,9 @@
           from: node
         });
       }
+      node.removeAttribute(name);
 
-      node.removeAttribute(name); // We void attribute values for unremovable "is"" attributes
-
+      // We void attribute values for unremovable "is"" attributes
       if (name === 'is' && !ALLOWED_ATTR[name]) {
         if (RETURN_DOM || RETURN_DOM_FRAGMENT) {
           try {
@@ -915,19 +834,17 @@
         }
       }
     };
+
     /**
      * _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 {
@@ -935,83 +852,74 @@
         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 */
-
 
+      /* 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 ? emptyHTML : dirtyPayload;
-        } catch (_) {// Syntax error if dirtyPayload is invalid xml
+        } 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 */
-
 
+      /* 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);
+      return createNodeIterator.call(root.ownerDocument || root, root,
+      // eslint-disable-next-line no-bitwise
+      NodeFilter.SHOW_ELEMENT | NodeFilter.SHOW_COMMENT | NodeFilter.SHOW_TEXT | NodeFilter.SHOW_PROCESSING_INSTRUCTION | NodeFilter.SHOW_CDATA_SECTION, 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
@@ -1020,17 +928,15 @@
      * @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
      *
@@ -1041,108 +947,101 @@
      * @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 */
 
+      /* Execute a hook if present */
       _executeHook('beforeSanitizeElements', currentNode, null);
-      /* Check if element is clobbered or can clobber */
-
 
+      /* Check if element is clobbered or can clobber */
       if (_isClobbered(currentNode)) {
         _forceRemove(currentNode);
-
         return true;
       }
-      /* Check if tagname contains Unicode */
-
 
+      /* 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 */
-
 
+      /* Now let's check the element's type and name */
       var tagName = transformCaseFunc(currentNode.nodeName);
-      /* Execute a hook if present */
 
+      /* Execute a hook if present */
       _executeHook('uponSanitizeElement', currentNode, {
         tagName: tagName,
         allowedTags: ALLOWED_TAGS
       });
-      /* Detect mXSS attempts abusing namespace confusion */
-
 
+      /* 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 */
-
 
+      /* Mitigate a problem with templates inside select */
       if (tagName === 'select' && regExpTest(/<template/i, currentNode.innerHTML)) {
         _forceRemove(currentNode);
+        return true;
+      }
 
+      /* Remove any ocurrence of processing instructions */
+      if (currentNode.nodeType === 7) {
+        _forceRemove(currentNode);
         return true;
       }
-      /* Remove element if anything forbids its presence */
 
+      /* Remove any kind of possibly harmful comments */
+      if (SAFE_FOR_XML && currentNode.nodeType === 8 && regExpTest(/<[/\w]/g, currentNode.data)) {
+        _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 */
-
 
+        /* 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));
+              var childClone = cloneNode(childNodes[i], true);
+              childClone.__removalCount = (currentNode.__removalCount || 0) + 1;
+              parentNode.insertBefore(childClone, getNextSibling(currentNode));
             }
           }
         }
-
         _forceRemove(currentNode);
-
         return true;
       }
-      /* Check whether element has a valid namespace */
-
 
+      /* 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)) {
+      /* Make sure that older browsers don't get fallback-tag mXSS */
+      if ((tagName === 'noscript' || tagName === 'noembed' || tagName === 'noframes') && regExpTest(/<\/no(script|embed|frames)/i, currentNode.innerHTML)) {
         _forceRemove(currentNode);
-
         return true;
       }
-      /* Sanitize element content to be template-safe */
-
 
+      /* 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()
@@ -1150,13 +1049,12 @@
           currentNode.textContent = content;
         }
       }
-      /* Execute a hook if present */
-
 
+      /* Execute a hook if present */
       _executeHook('afterSanitizeElements', currentNode, null);
-
       return false;
     };
+
     /**
      * _isValidAttribute
      *
@@ -1166,47 +1064,44 @@
      * @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
+        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
+        _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 {
+      } 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) {
         return false;
-      }
-
+      } else ;
       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;
+      return tagName !== 'annotation-xml' && stringMatch(tagName, CUSTOM_ELEMENT$1);
     };
+
     /**
      * _sanitizeAttributes
      *
@@ -1217,24 +1112,19 @@
      *
      * @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 */
 
+      /* Check if we have attributes; if not we might have a text node */
       if (!attributes) {
         return;
       }
-
       var hookEvent = {
         attrName: '',
         attrValue: '',
@@ -1242,95 +1132,92 @@
         allowedAttributes: ALLOWED_ATTR
       };
       l = attributes.length;
-      /* Go backwards over all attributes; safely remove bad ones */
 
+      /* Go backwards over all attributes; safely remove bad ones */
       while (l--) {
         attr = attributes[l];
         var _attr = attr,
-            name = _attr.name,
-            namespaceURI = _attr.namespaceURI;
+          name = _attr.name,
+          namespaceURI = _attr.namespaceURI;
         value = name === 'value' ? attr.value : stringTrim(attr.value);
         lcName = transformCaseFunc(name);
-        /* Execute a hook if present */
 
+        /* 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? */
 
+        /* Did the hooks approve of the attribute? */
         if (hookEvent.forceKeepAttr) {
           continue;
         }
-        /* Remove attribute */
-
 
+        /* Remove attribute */
         _removeAttribute(name, currentNode);
-        /* Did the hooks approve of the attribute? */
-
 
+        /* Did the hooks approve of the attribute? */
         if (!hookEvent.keepAttr) {
           continue;
         }
-        /* Work around a security issue in jQuery 3.0 */
-
 
+        /* Work around a security issue in jQuery 3.0 */
         if (!ALLOW_SELF_CLOSE_IN_ATTR && regExpTest(/\/>/i, value)) {
           _removeAttribute(name, currentNode);
-
           continue;
         }
-        /* Sanitize attribute content to be template-safe */
-
 
+        /* 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? */
-
 
+        /* 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
-
+          _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 */
 
+        /* Work around a security issue with comments inside attributes */
+        if (SAFE_FOR_XML && regExpTest(/((--!?|])>)|<\/(style|title)/i, value)) {
+          _removeAttribute(name, currentNode);
+          continue;
+        }
 
+        /* 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;
-
+                {
+                  value = trustedTypesPolicy.createHTML(value);
+                  break;
+                }
               case 'TrustedScriptURL':
-                value = trustedTypesPolicy.createScriptURL(value);
-                break;
+                {
+                  value = trustedTypesPolicy.createScriptURL(value);
+                  break;
+                }
             }
           }
         }
-        /* Handle invalid data-* attribute set by try-catching it */
-
 
+        /* Handle invalid data-* attribute set by try-catching it */
         try {
           if (namespaceURI) {
             currentNode.setAttributeNS(namespaceURI, name, value);
@@ -1338,56 +1225,51 @@
             /* Fallback to setAttribute() for browser-unrecognized namespaces e.g. "x-schema". */
             currentNode.setAttribute(name, value);
           }
-
-          arrayPop(DOMPurify.removed);
+          if (_isClobbered(currentNode)) {
+            _forceRemove(currentNode);
+          } else {
+            arrayPop(DOMPurify.removed);
+          }
         } catch (_) {}
       }
-      /* Execute a hook if present */
-
 
+      /* 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 */
-
 
+      /* 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 */
-
 
+        /* Sanitize tags and elements */
         if (_sanitizeElements(shadowNode)) {
           continue;
         }
-        /* Deep shadow DOM detected */
-
 
+        /* Deep shadow DOM detected */
         if (shadowNode.content instanceof DocumentFragment) {
           _sanitizeShadowDOM(shadowNode.content);
         }
-        /* Check attributes, sanitize if necessary */
-
 
+        /* Check attributes, sanitize if necessary */
         _sanitizeAttributes(shadowNode);
       }
-      /* Execute a hook if present */
-
 
+      /* Execute a hook if present */
       _executeHook('afterSanitizeShadowDOM', fragment, null);
     };
+
     /**
      * Sanitize
      * Public method providing core sanitation functionality
@@ -1396,8 +1278,6 @@
      * @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;
@@ -1408,64 +1288,52 @@
       /* 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 */
-
 
+      /* 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 {
+        if (typeof dirty.toString === 'function') {
           dirty = dirty.toString();
-
           if (typeof dirty !== 'string') {
             throw typeErrorCreate('dirty is not a string, aborting');
           }
+        } else {
+          throw typeErrorCreate('toString is not a function');
         }
       }
-      /* Check we can run. Otherwise fall back or ignore */
-
 
+      /* 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 */
-
 
+      /* Assign config vars */
       if (!SET_CONFIG) {
         _parseConfig(cfg);
       }
-      /* Clean up removed elements */
-
 
+      /* Clean up removed elements */
       DOMPurify.removed = [];
-      /* Check if dirty is correctly typed for IN_PLACE */
 
+      /* 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');
           }
@@ -1475,7 +1343,6 @@
            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;
@@ -1487,71 +1354,61 @@
         }
       } else {
         /* Exit directly if we have nothing to do */
-        if (!RETURN_DOM && !SAFE_FOR_TEMPLATES && !WHOLE_DOCUMENT && // eslint-disable-next-line unicorn/prefer-includes
+        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 */
-
 
+        /* Initialize the document to work on */
         body = _initDocument(dirty);
-        /* Check we have a DOM node from the data */
 
+        /* 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 */
-
 
+      /* Remove first element node (ours) if FORCE_BODY is set */
       if (body && FORCE_BODY) {
         _forceRemove(body.firstChild);
       }
-      /* Get node iterator */
-
 
+      /* Get node iterator */
       var nodeIterator = _createIterator(IN_PLACE ? dirty : body);
-      /* Now start iterating over the created document */
-
 
+      /* 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 */
-
 
+        /* Sanitize tags and elements */
         if (_sanitizeElements(currentNode)) {
           continue;
         }
-        /* Shadow DOM detected, sanitize it */
-
 
+        /* Shadow DOM detected, sanitize it */
         if (currentNode.content instanceof DocumentFragment) {
           _sanitizeShadowDOM(currentNode.content);
         }
-        /* Check attributes, sanitize if necessary */
-
 
+        /* Check attributes, sanitize if necessary */
         _sanitizeAttributes(currentNode);
-
         oldNode = currentNode;
       }
-
       oldNode = null;
-      /* If we sanitized `dirty` in-place, return it. */
 
+      /* If we sanitized `dirty` in-place, return it. */
       if (IN_PLACE) {
         return dirty;
       }
-      /* Return sanitized string or DOM */
-
 
+      /* 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);
@@ -1559,7 +1416,6 @@
         } else {
           returnNode = body;
         }
-
         if (ALLOWED_ATTR.shadowroot || ALLOWED_ATTR.shadowrootmod) {
           /*
             AdoptNode() is not used because internal state is not reset
@@ -1570,51 +1426,45 @@
           */
           returnNode = importNode.call(originalDocument, returnNode, true);
         }
-
         return returnNode;
       }
-
       var serializedHTML = WHOLE_DOCUMENT ? body.outerHTML : body.innerHTML;
-      /* Serialize doctype if allowed */
 
+      /* 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 */
-
 
+      /* 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.
@@ -1625,18 +1475,16 @@
      * @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
@@ -1644,16 +1492,14 @@
      * @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
@@ -1662,40 +1508,34 @@
      * @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;