From: Colin Watson <cjwatson@debian.org>
Date: Tue, 1 Oct 2024 15:00:43 +0000 (+0100)
Subject: Add purify.js from node-dompurify 3.1.6+dfsg+~3.0.5-1
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~cjwatson/git?a=commitdiff_plain;h=542095dd277c34daf0e355ae351764a4821373e2;p=blog.git

Add purify.js from node-dompurify 3.1.6+dfsg+~3.0.5-1
---

diff --git a/m.css/pelican-theme/templates/article_footer.html b/m.css/pelican-theme/templates/article_footer.html
index 6e3330d3..67ea9c46 100644
--- a/m.css/pelican-theme/templates/article_footer.html
+++ b/m.css/pelican-theme/templates/article_footer.html
@@ -9,7 +9,7 @@
     <noscript><p>Loading comments relies on JavaScript. Try enabling JavaScript and reloading, or visit <a href="https://{{ MASTODON_HOST }}/@{{ MASTODON_USERNAME }}/{{ article.metadata['mastodon-id'] }}">the original post</a> on Mastodon.</p></noscript>
   </div>
   <noscript>You need JavaScript to view the comments.</noscript>
-  <script src="/assets/js/purify.min.js"></script>
+  <script src="{{ SITEURL }}/static/purify.min.js"></script>
   <script type="text/javascript">
     function escapeHtml(unsafe) {
       return unsafe
diff --git a/static/purify.js b/static/purify.js
new file mode 100644
index 00000000..a4c82067
--- /dev/null
+++ b/static/purify.js
@@ -0,0 +1,1565 @@
+/*! @license DOMPurify undefined | (c) Cure53 and other contributors | Released under the Apache license 2.0 and Mozilla Public License 2.0 | github.com/cure53/DOMPurify/blob/undefined/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';
+
+  const {
+    entries,
+    setPrototypeOf,
+    isFrozen,
+    getPrototypeOf,
+    getOwnPropertyDescriptor
+  } = Object;
+  let {
+    freeze,
+    seal,
+    create
+  } = Object; // eslint-disable-line import/no-mutable-exports
+  let {
+    apply,
+    construct
+  } = typeof Reflect !== 'undefined' && Reflect;
+  if (!freeze) {
+    freeze = function freeze(x) {
+      return x;
+    };
+  }
+  if (!seal) {
+    seal = function seal(x) {
+      return x;
+    };
+  }
+  if (!apply) {
+    apply = function apply(fun, thisValue, args) {
+      return fun.apply(thisValue, args);
+    };
+  }
+  if (!construct) {
+    construct = function construct(Func, args) {
+      return new Func(...args);
+    };
+  }
+  const arrayForEach = unapply(Array.prototype.forEach);
+  const arrayPop = unapply(Array.prototype.pop);
+  const arrayPush = unapply(Array.prototype.push);
+  const stringToLowerCase = unapply(String.prototype.toLowerCase);
+  const stringToString = unapply(String.prototype.toString);
+  const stringMatch = unapply(String.prototype.match);
+  const stringReplace = unapply(String.prototype.replace);
+  const stringIndexOf = unapply(String.prototype.indexOf);
+  const stringTrim = unapply(String.prototype.trim);
+  const objectHasOwnProperty = unapply(Object.prototype.hasOwnProperty);
+  const regExpTest = unapply(RegExp.prototype.test);
+  const typeErrorCreate = unconstruct(TypeError);
+
+  /**
+   * Creates a new function that calls the given function with a specified thisArg and arguments.
+   *
+   * @param {Function} func - The function to be wrapped and called.
+   * @returns {Function} A new function that calls the given function with a specified thisArg and arguments.
+   */
+  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);
+    };
+  }
+
+  /**
+   * Creates a new function that constructs an instance of the given constructor function with the provided arguments.
+   *
+   * @param {Function} func - The constructor function to be wrapped and called.
+   * @returns {Function} A new function that constructs an instance of the given constructor function with the provided arguments.
+   */
+  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
+   *
+   * @param {Object} set - The set to which elements will be added.
+   * @param {Array} array - The array containing elements to be added to the set.
+   * @param {Function} transformCaseFunc - An optional function to transform the case of each element before adding to the set.
+   * @returns {Object} The modified set with added elements.
+   */
+  function addToSet(set, array) {
+    let transformCaseFunc = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 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);
+    }
+    let l = array.length;
+    while (l--) {
+      let element = array[l];
+      if (typeof element === 'string') {
+        const 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;
+  }
+
+  /**
+   * Clean up an array to harden against CSPP
+   *
+   * @param {Array} array - The array to be cleaned.
+   * @returns {Array} The cleaned version of the array
+   */
+  function cleanArray(array) {
+    for (let index = 0; index < array.length; index++) {
+      const isPropertyExist = objectHasOwnProperty(array, index);
+      if (!isPropertyExist) {
+        array[index] = null;
+      }
+    }
+    return array;
+  }
+
+  /**
+   * Shallow clone an object
+   *
+   * @param {Object} object - The object to be cloned.
+   * @returns {Object} A new object that copies the original.
+   */
+  function clone(object) {
+    const newObject = create(null);
+    for (const [property, value] of entries(object)) {
+      const isPropertyExist = objectHasOwnProperty(object, property);
+      if (isPropertyExist) {
+        if (Array.isArray(value)) {
+          newObject[property] = cleanArray(value);
+        } else if (value && typeof value === 'object' && value.constructor === Object) {
+          newObject[property] = clone(value);
+        } else {
+          newObject[property] = value;
+        }
+      }
+    }
+    return newObject;
+  }
+
+  /**
+   * This method automatically checks if the prop is function or getter and behaves accordingly.
+   *
+   * @param {Object} object - The object to look up the getter function in its prototype chain.
+   * @param {String} prop - The property name for which to find the getter function.
+   * @returns {Function} The getter function found in the prototype chain or a fallback function.
+   */
+  function lookupGetter(object, prop) {
+    while (object !== null) {
+      const 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() {
+      return null;
+    }
+    return fallbackValue;
+  }
+
+  const 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
+  const 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']);
+  const svgFilters = freeze(['feBlend', 'feColorMatrix', 'feComponentTransfer', 'feComposite', 'feConvolveMatrix', 'feDiffuseLighting', 'feDisplacementMap', 'feDistantLight', 'feDropShadow', '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.
+  const svgDisallowed = freeze(['animate', 'color-profile', 'cursor', 'discard', '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']);
+  const 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', 'mprescripts']);
+
+  // Similarly to SVG, we want to know all MathML elements,
+  // even those that we disallow by default.
+  const mathMlDisallowed = freeze(['maction', 'maligngroup', 'malignmark', 'mlongdiv', 'mscarries', 'mscarry', 'msgroup', 'mstack', 'msline', 'msrow', 'semantics', 'annotation', 'annotation-xml', 'mprescripts', 'none']);
+  const text = freeze(['#text']);
+
+  const 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', 'popover', 'popovertarget', 'popovertargetaction', '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', 'wrap', 'xmlns', 'slot']);
+  const 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']);
+  const 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']);
+  const xml = freeze(['xlink:href', 'xml:id', 'xlink:title', 'xml:space', 'xmlns:xlink']);
+
+  // eslint-disable-next-line unicorn/better-regex
+  const MUSTACHE_EXPR = seal(/\{\{[\w\W]*|[\w\W]*\}\}/gm); // Specify template detection regex for SAFE_FOR_TEMPLATES mode
+  const ERB_EXPR = seal(/<%[\w\W]*|[\w\W]*%>/gm);
+  const TMPLIT_EXPR = seal(/\${[\w\W]*}/gm);
+  const DATA_ATTR = seal(/^data-[\-\w.\u00B7-\uFFFF]/); // eslint-disable-line no-useless-escape
+  const ARIA_ATTR = seal(/^aria-[\-\w]+$/); // eslint-disable-line no-useless-escape
+  const IS_ALLOWED_URI = seal(/^(?:(?:(?:f|ht)tps?|mailto|tel|callto|sms|cid|xmpp):|[^a-z]|[a-z+.\-]+(?:[^a-z+.\-:]|$))/i // eslint-disable-line no-useless-escape
+  );
+
+  const IS_SCRIPT_OR_DATA = seal(/^(?:\w+script|data):/i);
+  const ATTR_WHITESPACE = seal(/[\u0000-\u0020\u00A0\u1680\u180E\u2000-\u2029\u205F\u3000]/g // eslint-disable-line no-control-regex
+  );
+
+  const DOCTYPE_NAME = seal(/^html$/i);
+  const CUSTOM_ELEMENT = seal(/^[a-z][.\w]*(-[.\w]+)+$/i);
+
+  var EXPRESSIONS = /*#__PURE__*/Object.freeze({
+    __proto__: null,
+    ARIA_ATTR: ARIA_ATTR,
+    ATTR_WHITESPACE: ATTR_WHITESPACE,
+    CUSTOM_ELEMENT: CUSTOM_ELEMENT,
+    DATA_ATTR: DATA_ATTR,
+    DOCTYPE_NAME: DOCTYPE_NAME,
+    ERB_EXPR: ERB_EXPR,
+    IS_ALLOWED_URI: IS_ALLOWED_URI,
+    IS_SCRIPT_OR_DATA: IS_SCRIPT_OR_DATA,
+    MUSTACHE_EXPR: MUSTACHE_EXPR,
+    TMPLIT_EXPR: TMPLIT_EXPR
+  });
+
+  // https://developer.mozilla.org/en-US/docs/Web/API/Node/nodeType
+  const NODE_TYPE = {
+    element: 1,
+    attribute: 2,
+    text: 3,
+    cdataSection: 4,
+    entityReference: 5,
+    // Deprecated
+    entityNode: 6,
+    // Deprecated
+    progressingInstruction: 7,
+    comment: 8,
+    document: 9,
+    documentType: 10,
+    documentFragment: 11,
+    notation: 12 // Deprecated
+  };
+
+  const 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 {HTMLScriptElement} purifyHostElement The Script element used to load DOMPurify (to determine policy name suffix).
+   * @return {TrustedTypePolicy} The policy created (or null, if Trusted Types
+   * are not supported or creating the policy failed).
+   */
+  const _createTrustedTypesPolicy = function _createTrustedTypesPolicy(trustedTypes, purifyHostElement) {
+    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.
+    let suffix = null;
+    const ATTR_NAME = 'data-tt-policy-suffix';
+    if (purifyHostElement && purifyHostElement.hasAttribute(ATTR_NAME)) {
+      suffix = purifyHostElement.getAttribute(ATTR_NAME);
+    }
+    const policyName = 'dompurify' + (suffix ? '#' + suffix : '');
+    try {
+      return trustedTypes.createPolicy(policyName, {
+        createHTML(html) {
+          return html;
+        },
+        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() {
+    let window = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : getGlobal();
+    const DOMPurify = root => createDOMPurify(root);
+
+    /**
+     * Version label, exposed for easier checks
+     * if DOMPurify is up to date or not
+     */
+    DOMPurify.version = 'undefined';
+
+    /**
+     * Array of elements that DOMPurify removed during sanitation.
+     * Empty if nothing was removed.
+     */
+    DOMPurify.removed = [];
+    if (!window || !window.document || window.document.nodeType !== NODE_TYPE.document) {
+      // Not running in a browser, provide a factory function
+      // so that you can pass your own Window
+      DOMPurify.isSupported = false;
+      return DOMPurify;
+    }
+    let {
+      document
+    } = window;
+    const originalDocument = document;
+    const currentScript = originalDocument.currentScript;
+    const {
+      DocumentFragment,
+      HTMLTemplateElement,
+      Node,
+      Element,
+      NodeFilter,
+      NamedNodeMap = window.NamedNodeMap || window.MozNamedAttrMap,
+      HTMLFormElement,
+      DOMParser,
+      trustedTypes
+    } = window;
+    const ElementPrototype = Element.prototype;
+    const cloneNode = lookupGetter(ElementPrototype, 'cloneNode');
+    const remove = lookupGetter(ElementPrototype, 'remove');
+    const getNextSibling = lookupGetter(ElementPrototype, 'nextSibling');
+    const getChildNodes = lookupGetter(ElementPrototype, 'childNodes');
+    const 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') {
+      const template = document.createElement('template');
+      if (template.content && template.content.ownerDocument) {
+        document = template.content.ownerDocument;
+      }
+    }
+    let trustedTypesPolicy;
+    let emptyHTML = '';
+    const {
+      implementation,
+      createNodeIterator,
+      createDocumentFragment,
+      getElementsByTagName
+    } = document;
+    const {
+      importNode
+    } = originalDocument;
+    let hooks = {};
+
+    /**
+     * Expose whether this browser supports running the full DOMPurify.
+     */
+    DOMPurify.isSupported = typeof entries === 'function' && typeof getParentNode === 'function' && implementation && implementation.createHTMLDocument !== undefined;
+    const {
+      MUSTACHE_EXPR,
+      ERB_EXPR,
+      TMPLIT_EXPR,
+      DATA_ATTR,
+      ARIA_ATTR,
+      IS_SCRIPT_OR_DATA,
+      ATTR_WHITESPACE,
+      CUSTOM_ELEMENT
+    } = EXPRESSIONS;
+    let {
+      IS_ALLOWED_URI: IS_ALLOWED_URI$1
+    } = EXPRESSIONS;
+
+    /**
+     * 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 */
+    let ALLOWED_TAGS = null;
+    const DEFAULT_ALLOWED_TAGS = addToSet({}, [...html$1, ...svg$1, ...svgFilters, ...mathMl$1, ...text]);
+
+    /* Allowed attribute names */
+    let ALLOWED_ATTR = null;
+    const DEFAULT_ALLOWED_ATTR = addToSet({}, [...html, ...svg, ...mathMl, ...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`.
+     */
+    let CUSTOM_ELEMENT_HANDLING = Object.seal(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) */
+    let FORBID_TAGS = null;
+
+    /* Explicitly forbidden attributes (overrides ALLOWED_ATTR/ADD_ATTR) */
+    let FORBID_ATTR = null;
+
+    /* Decide if ARIA attributes are okay */
+    let ALLOW_ARIA_ATTR = true;
+
+    /* Decide if custom data attributes are okay */
+    let ALLOW_DATA_ATTR = true;
+
+    /* Decide if unknown protocols are okay */
+    let ALLOW_UNKNOWN_PROTOCOLS = false;
+
+    /* Decide if self-closing tags in attributes are allowed.
+     * Usually removed due to a mXSS issue in jQuery 3.0 */
+    let ALLOW_SELF_CLOSE_IN_ATTR = true;
+
+    /* Output should be safe for common template engines.
+     * This means, DOMPurify removes data attributes, mustaches and ERB
+     */
+    let SAFE_FOR_TEMPLATES = false;
+
+    /* Output should be safe even for XML used within HTML and alike.
+     * This means, DOMPurify removes comments when containing risky content.
+     */
+    let SAFE_FOR_XML = true;
+
+    /* Decide if document with <html>... should be returned */
+    let WHOLE_DOCUMENT = false;
+
+    /* Track whether config is already set on this instance of DOMPurify. */
+    let 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 */
+    let 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
+     */
+    let 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) */
+    let 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  */
+    let RETURN_TRUSTED_TYPE = false;
+
+    /* Output should be free from DOM clobbering attacks?
+     * This sanitizes markups named with colliding, clobberable built-in DOM APIs.
+     */
+    let 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-`
+     */
+    let SANITIZE_NAMED_PROPS = false;
+    const SANITIZE_NAMED_PROPS_PREFIX = 'user-content-';
+
+    /* Keep element content when removing element? */
+    let 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 */
+    let IN_PLACE = false;
+
+    /* Allow usage of profiles like html, svg and mathMl */
+    let USE_PROFILES = {};
+
+    /* Tags to ignore content of when KEEP_CONTENT is true */
+    let FORBID_CONTENTS = null;
+    const 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 */
+    let DATA_URI_TAGS = null;
+    const DEFAULT_DATA_URI_TAGS = addToSet({}, ['audio', 'video', 'img', 'source', 'image', 'track']);
+
+    /* Attributes safe for values like "javascript:" */
+    let URI_SAFE_ATTRIBUTES = null;
+    const DEFAULT_URI_SAFE_ATTRIBUTES = addToSet({}, ['alt', 'class', 'for', 'id', 'label', 'name', 'pattern', 'placeholder', 'role', 'summary', 'title', 'value', 'style', 'xmlns']);
+    const MATHML_NAMESPACE = 'http://www.w3.org/1998/Math/MathML';
+    const SVG_NAMESPACE = 'http://www.w3.org/2000/svg';
+    const HTML_NAMESPACE = 'http://www.w3.org/1999/xhtml';
+    /* Document namespace */
+    let NAMESPACE = HTML_NAMESPACE;
+    let IS_EMPTY_INPUT = false;
+
+    /* Allowed XHTML+XML namespaces */
+    let ALLOWED_NAMESPACES = null;
+    const DEFAULT_ALLOWED_NAMESPACES = addToSet({}, [MATHML_NAMESPACE, SVG_NAMESPACE, HTML_NAMESPACE], stringToString);
+
+    /* Parsing of strict XHTML documents */
+    let PARSER_MEDIA_TYPE = null;
+    const SUPPORTED_PARSER_MEDIA_TYPES = ['application/xhtml+xml', 'text/html'];
+    const DEFAULT_PARSER_MEDIA_TYPE = 'text/html';
+    let transformCaseFunc = null;
+
+    /* Keep a reference to config to pass to hooks */
+    let CONFIG = null;
+
+    /* Ideally, do not touch anything below this line */
+    /* ______________________________________________ */
+
+    const formElement = document.createElement('form');
+    const isRegexOrFunction = function isRegexOrFunction(testValue) {
+      return testValue instanceof RegExp || testValue instanceof Function;
+    };
+
+    /**
+     * _parseConfig
+     *
+     * @param  {Object} cfg optional config literal
+     */
+    // eslint-disable-next-line complexity
+    const _parseConfig = function _parseConfig() {
+      let cfg = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
+      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 ? DEFAULT_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 = objectHasOwnProperty(cfg, 'ALLOWED_TAGS') ? addToSet({}, cfg.ALLOWED_TAGS, transformCaseFunc) : DEFAULT_ALLOWED_TAGS;
+      ALLOWED_ATTR = objectHasOwnProperty(cfg, 'ALLOWED_ATTR') ? addToSet({}, cfg.ALLOWED_ATTR, transformCaseFunc) : DEFAULT_ALLOWED_ATTR;
+      ALLOWED_NAMESPACES = objectHasOwnProperty(cfg, 'ALLOWED_NAMESPACES') ? addToSet({}, cfg.ALLOWED_NAMESPACES, stringToString) : DEFAULT_ALLOWED_NAMESPACES;
+      URI_SAFE_ATTRIBUTES = objectHasOwnProperty(cfg, 'ADD_URI_SAFE_ATTR') ? 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 = objectHasOwnProperty(cfg, 'ADD_DATA_URI_TAGS') ? 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 = objectHasOwnProperty(cfg, 'FORBID_CONTENTS') ? addToSet({}, cfg.FORBID_CONTENTS, transformCaseFunc) : DEFAULT_FORBID_CONTENTS;
+      FORBID_TAGS = objectHasOwnProperty(cfg, 'FORBID_TAGS') ? addToSet({}, cfg.FORBID_TAGS, transformCaseFunc) : {};
+      FORBID_ATTR = objectHasOwnProperty(cfg, 'FORBID_ATTR') ? addToSet({}, cfg.FORBID_ATTR, transformCaseFunc) : {};
+      USE_PROFILES = objectHasOwnProperty(cfg, 'USE_PROFILES') ? 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;
+      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 */
+      if (USE_PROFILES) {
+        ALLOWED_TAGS = addToSet({}, 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;
+      }
+      if (cfg.TRUSTED_TYPES_POLICY) {
+        if (typeof cfg.TRUSTED_TYPES_POLICY.createHTML !== 'function') {
+          throw typeErrorCreate('TRUSTED_TYPES_POLICY configuration option must provide a "createHTML" hook.');
+        }
+        if (typeof cfg.TRUSTED_TYPES_POLICY.createScriptURL !== 'function') {
+          throw typeErrorCreate('TRUSTED_TYPES_POLICY configuration option must provide a "createScriptURL" hook.');
+        }
+
+        // Overwrite existing TrustedTypes policy.
+        trustedTypesPolicy = cfg.TRUSTED_TYPES_POLICY;
+
+        // Sign local variables required by `sanitize`.
+        emptyHTML = trustedTypesPolicy.createHTML('');
+      } else {
+        // Uninitialized policy, attempt to initialize the internal dompurify policy.
+        if (trustedTypesPolicy === undefined) {
+          trustedTypesPolicy = _createTrustedTypesPolicy(trustedTypes, currentScript);
+        }
+
+        // If creating the internal policy succeeded sign internal variables.
+        if (trustedTypesPolicy !== null && typeof emptyHTML === 'string') {
+          emptyHTML = trustedTypesPolicy.createHTML('');
+        }
+      }
+
+      // Prevent further manipulation of configuration.
+      // Not available in IE8, Safari 5, etc.
+      if (freeze) {
+        freeze(cfg);
+      }
+      CONFIG = cfg;
+    };
+    const MATHML_TEXT_INTEGRATION_POINTS = addToSet({}, ['mi', 'mo', 'mn', 'ms', 'mtext']);
+    const HTML_INTEGRATION_POINTS = addToSet({}, ['foreignobject', '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.
+    const 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. */
+    const ALL_SVG_TAGS = addToSet({}, [...svg$1, ...svgFilters, ...svgDisallowed]);
+    const ALL_MATHML_TAGS = addToSet({}, [...mathMl$1, ...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.
+     */
+    const _checkValidNamespace = function _checkValidNamespace(element) {
+      let 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'
+        };
+      }
+      const tagName = stringToLowerCase(element.tagName);
+      const 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
+     */
+    const _forceRemove = function _forceRemove(node) {
+      arrayPush(DOMPurify.removed, {
+        element: node
+      });
+      try {
+        // eslint-disable-next-line unicorn/prefer-dom-node-remove
+        getParentNode(node).removeChild(node);
+      } catch (_) {
+        remove(node);
+      }
+    };
+
+    /**
+     * _removeAttribute
+     *
+     * @param  {String} name an Attribute name
+     * @param  {Node} node a DOM node
+     */
+    const _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
+     */
+    const _initDocument = function _initDocument(dirty) {
+      /* Create a HTML document */
+      let doc = null;
+      let leadingWhitespace = null;
+      if (FORCE_BODY) {
+        dirty = '<remove></remove>' + dirty;
+      } else {
+        /* If FORCE_BODY isn't used, leading whitespace needs to be preserved manually */
+        const 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>';
+      }
+      const 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 ? emptyHTML : dirtyPayload;
+        } catch (_) {
+          // Syntax error if dirtyPayload is invalid xml
+        }
+      }
+      const 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;
+    };
+
+    /**
+     * Creates a NodeIterator object that you can use to traverse filtered lists of nodes or elements in a document.
+     *
+     * @param  {Node} root The root element or node to start traversing on.
+     * @return {NodeIterator} The created NodeIterator
+     */
+    const _createNodeIterator = function _createNodeIterator(root) {
+      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);
+    };
+
+    /**
+     * _isClobbered
+     *
+     * @param  {Node} elm element to check for clobbering attacks
+     * @return {Boolean} true if clobbered, false if safe
+     */
+    const _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');
+    };
+
+    /**
+     * Checks whether the given object is a DOM node.
+     *
+     * @param  {Node} object object to check whether it's a DOM node
+     * @return {Boolean} true is object is a DOM node
+     */
+    const _isNode = function _isNode(object) {
+      return typeof Node === 'function' && object instanceof Node;
+    };
+
+    /**
+     * _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
+     */
+    const _executeHook = function _executeHook(entryPoint, currentNode, data) {
+      if (!hooks[entryPoint]) {
+        return;
+      }
+      arrayForEach(hooks[entryPoint], 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
+     */
+    const _sanitizeElements = function _sanitizeElements(currentNode) {
+      let content = null;
+
+      /* Execute a hook if present */
+      _executeHook('beforeSanitizeElements', currentNode, null);
+
+      /* Check if element is clobbered or can clobber */
+      if (_isClobbered(currentNode)) {
+        _forceRemove(currentNode);
+        return true;
+      }
+
+      /* Now let's check the element's type and name */
+      const tagName = transformCaseFunc(currentNode.nodeName);
+
+      /* Execute a hook if present */
+      _executeHook('uponSanitizeElement', currentNode, {
+        tagName,
+        allowedTags: ALLOWED_TAGS
+      });
+
+      /* Detect mXSS attempts abusing namespace confusion */
+      if (currentNode.hasChildNodes() && !_isNode(currentNode.firstElementChild) && regExpTest(/<[/\w]/g, currentNode.innerHTML) && regExpTest(/<[/\w]/g, currentNode.textContent)) {
+        _forceRemove(currentNode);
+        return true;
+      }
+
+      /* Remove any occurrence of processing instructions */
+      if (currentNode.nodeType === NODE_TYPE.progressingInstruction) {
+        _forceRemove(currentNode);
+        return true;
+      }
+
+      /* Remove any kind of possibly harmful comments */
+      if (SAFE_FOR_XML && currentNode.nodeType === NODE_TYPE.comment && 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] && _isBasicCustomElement(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]) {
+          const parentNode = getParentNode(currentNode) || currentNode.parentNode;
+          const childNodes = getChildNodes(currentNode) || currentNode.childNodes;
+          if (childNodes && parentNode) {
+            const childCount = childNodes.length;
+            for (let i = childCount - 1; i >= 0; --i) {
+              const 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 */
+      if (currentNode instanceof Element && !_checkValidNamespace(currentNode)) {
+        _forceRemove(currentNode);
+        return true;
+      }
+
+      /* 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 */
+      if (SAFE_FOR_TEMPLATES && currentNode.nodeType === NODE_TYPE.text) {
+        /* Get the element's text content */
+        content = currentNode.textContent;
+        arrayForEach([MUSTACHE_EXPR, ERB_EXPR, TMPLIT_EXPR], expr => {
+          content = stringReplace(content, expr, ' ');
+        });
+        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
+    const _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, lcName)) ; else if (ALLOW_ARIA_ATTR && regExpTest(ARIA_ATTR, 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
+        _isBasicCustomElement(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, ''))) ; 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, stringReplace(value, ATTR_WHITESPACE, ''))) ; else if (value) {
+        return false;
+      } else ;
+      return true;
+    };
+
+    /**
+     * _isBasicCustomElement
+     * 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
+     * @returns {boolean} Returns true if the tag name meets the basic criteria for a custom element, otherwise false.
+     */
+    const _isBasicCustomElement = function _isBasicCustomElement(tagName) {
+      return tagName !== 'annotation-xml' && stringMatch(tagName, CUSTOM_ELEMENT);
+    };
+
+    /**
+     * _sanitizeAttributes
+     *
+     * @protect attributes
+     * @protect nodeName
+     * @protect removeAttribute
+     * @protect setAttribute
+     *
+     * @param  {Node} currentNode to sanitize
+     */
+    const _sanitizeAttributes = function _sanitizeAttributes(currentNode) {
+      /* Execute a hook if present */
+      _executeHook('beforeSanitizeAttributes', currentNode, null);
+      const {
+        attributes
+      } = currentNode;
+
+      /* Check if we have attributes; if not we might have a text node */
+      if (!attributes) {
+        return;
+      }
+      const hookEvent = {
+        attrName: '',
+        attrValue: '',
+        keepAttr: true,
+        allowedAttributes: ALLOWED_ATTR
+      };
+      let l = attributes.length;
+
+      /* Go backwards over all attributes; safely remove bad ones */
+      while (l--) {
+        const attr = attributes[l];
+        const {
+          name,
+          namespaceURI,
+          value: attrValue
+        } = attr;
+        const lcName = transformCaseFunc(name);
+        let value = name === 'value' ? attrValue : stringTrim(attrValue);
+
+        /* 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;
+
+        /* Work around a security issue with comments inside attributes */
+        if (SAFE_FOR_XML && regExpTest(/((--!?|])>)|<\/(style|title)/i, value)) {
+          _removeAttribute(name, currentNode);
+          continue;
+        }
+
+        /* 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 (!ALLOW_SELF_CLOSE_IN_ATTR && regExpTest(/\/>/i, value)) {
+          _removeAttribute(name, currentNode);
+          continue;
+        }
+
+        /* Sanitize attribute content to be template-safe */
+        if (SAFE_FOR_TEMPLATES) {
+          arrayForEach([MUSTACHE_EXPR, ERB_EXPR, TMPLIT_EXPR], expr => {
+            value = stringReplace(value, expr, ' ');
+          });
+        }
+
+        /* Is `value` valid for this attribute? */
+        const 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);
+          }
+          if (_isClobbered(currentNode)) {
+            _forceRemove(currentNode);
+          } else {
+            arrayPop(DOMPurify.removed);
+          }
+        } catch (_) {}
+      }
+
+      /* Execute a hook if present */
+      _executeHook('afterSanitizeAttributes', currentNode, null);
+    };
+
+    /**
+     * _sanitizeShadowDOM
+     *
+     * @param  {DocumentFragment} fragment to iterate over recursively
+     */
+    const _sanitizeShadowDOM = function _sanitizeShadowDOM(fragment) {
+      let shadowNode = null;
+      const shadowIterator = _createNodeIterator(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} cfg object
+     */
+    // eslint-disable-next-line complexity
+    DOMPurify.sanitize = function (dirty) {
+      let cfg = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
+      let body = null;
+      let importedNode = null;
+      let currentNode = null;
+      let returnNode = null;
+      /* 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)) {
+        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');
+        }
+      }
+
+      /* Return dirty HTML if DOMPurify cannot run */
+      if (!DOMPurify.isSupported) {
+        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) {
+          const 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 === NODE_TYPE.element && 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 */
+      const nodeIterator = _createNodeIterator(IN_PLACE ? dirty : body);
+
+      /* Now start iterating over the created document */
+      while (currentNode = nodeIterator.nextNode()) {
+        /* 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);
+      }
+
+      /* 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 || ALLOWED_ATTR.shadowrootmode) {
+          /*
+            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;
+      }
+      let 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) {
+        arrayForEach([MUSTACHE_EXPR, ERB_EXPR, TMPLIT_EXPR], expr => {
+          serializedHTML = stringReplace(serializedHTML, expr, ' ');
+        });
+      }
+      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 () {
+      let cfg = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : {};
+      _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({});
+      }
+      const lcTag = transformCaseFunc(tag);
+      const 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
diff --git a/static/purify.min.js b/static/purify.min.js
new file mode 100644
index 00000000..c4f041fc
--- /dev/null
+++ b/static/purify.min.js
@@ -0,0 +1,3 @@
+/*! @license DOMPurify undefined | (c) Cure53 and other contributors | Released under the Apache license 2.0 and Mozilla Public License 2.0 | github.com/cure53/DOMPurify/blob/undefined/LICENSE */
+!function(e,t){"object"==typeof exports&&"undefined"!=typeof module?module.exports=t():"function"==typeof define&&define.amd?define(t):(e="undefined"!=typeof globalThis?globalThis:e||self).DOMPurify=t()}(this,(function(){"use strict";const{entries:e,setPrototypeOf:t,isFrozen:n,getPrototypeOf:o,getOwnPropertyDescriptor:r}=Object;let{freeze:i,seal:a,create:l}=Object,{apply:c,construct:s}="undefined"!=typeof Reflect&&Reflect;i||(i=function(e){return e}),a||(a=function(e){return e}),c||(c=function(e,t,n){return e.apply(t,n)}),s||(s=function(e,t){return new e(...t)});const u=b(Array.prototype.forEach),m=b(Array.prototype.pop),p=b(Array.prototype.push),f=b(String.prototype.toLowerCase),d=b(String.prototype.toString),h=b(String.prototype.match),g=b(String.prototype.replace),T=b(String.prototype.indexOf),y=b(String.prototype.trim),E=b(Object.prototype.hasOwnProperty),_=b(RegExp.prototype.test),A=(N=TypeError,function(){for(var e=arguments.length,t=new 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