dompurify
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DOMPurify is a DOM-only, super-fast, uber-tolerant XSS sanitizer for HTML, MathML and SVG. It runs as JavaScript and works in all modern browsers, as well as in Node.js (via jsdom). DOMPurify is written by security people who have vast background in web a
984 lines (978 loc) • 108 kB
JavaScript
/*! @license DOMPurify 3.4.11 | (c) Cure53 and other contributors | Released under the Apache license 2.0 and Mozilla Public License 2.0 | github.com/cure53/DOMPurify/blob/3.4.11/LICENSE */
function _arrayLikeToArray(r, a) {
(null == a || a > r.length) && (a = r.length);
for (var e = 0, n = Array(a); e < a; e++) n[e] = r[e];
return n;
}
function _arrayWithHoles(r) {
if (Array.isArray(r)) return r;
}
function _iterableToArrayLimit(r, l) {
var t = null == r ? null : "undefined" != typeof Symbol && r[Symbol.iterator] || r["@@iterator"];
if (null != t) {
var e,
n,
i,
u,
a = [],
f = true,
o = false;
try {
if (i = (t = t.call(r)).next, 0 === l) ; else for (; !(f = (e = i.call(t)).done) && (a.push(e.value), a.length !== l); f = !0);
} catch (r) {
o = true, n = r;
} finally {
try {
if (!f && null != t.return && (u = t.return(), Object(u) !== u)) return;
} finally {
if (o) throw n;
}
}
return a;
}
}
function _nonIterableRest() {
throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
}
function _slicedToArray(r, e) {
return _arrayWithHoles(r) || _iterableToArrayLimit(r, e) || _unsupportedIterableToArray(r, e) || _nonIterableRest();
}
function _unsupportedIterableToArray(r, a) {
if (r) {
if ("string" == typeof r) return _arrayLikeToArray(r, a);
var t = {}.toString.call(r).slice(8, -1);
return "Object" === t && r.constructor && (t = r.constructor.name), "Map" === t || "Set" === t ? Array.from(r) : "Arguments" === t || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(t) ? _arrayLikeToArray(r, a) : void 0;
}
}
const entries = Object.entries,
setPrototypeOf = Object.setPrototypeOf,
isFrozen = Object.isFrozen,
getPrototypeOf = Object.getPrototypeOf,
getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;
let freeze = Object.freeze,
seal = Object.seal,
create = Object.create; // eslint-disable-line import/no-mutable-exports
let _ref = typeof Reflect !== 'undefined' && Reflect,
apply = _ref.apply,
construct = _ref.construct;
if (!freeze) {
freeze = function freeze(x) {
return x;
};
}
if (!seal) {
seal = function seal(x) {
return x;
};
}
if (!apply) {
apply = function apply(func, thisArg) {
for (var _len = arguments.length, args = new Array(_len > 2 ? _len - 2 : 0), _key = 2; _key < _len; _key++) {
args[_key - 2] = arguments[_key];
}
return func.apply(thisArg, args);
};
}
if (!construct) {
construct = function construct(Func) {
for (var _len2 = arguments.length, args = new Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {
args[_key2 - 1] = arguments[_key2];
}
return new Func(...args);
};
}
const arrayForEach = unapply(Array.prototype.forEach);
const arrayLastIndexOf = unapply(Array.prototype.lastIndexOf);
const arrayPop = unapply(Array.prototype.pop);
const arrayPush = unapply(Array.prototype.push);
const arraySplice = unapply(Array.prototype.splice);
const arrayIsArray = Array.isArray;
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 numberToString = unapply(Number.prototype.toString);
const booleanToString = unapply(Boolean.prototype.toString);
const bigintToString = typeof BigInt === 'undefined' ? null : unapply(BigInt.prototype.toString);
const symbolToString = typeof Symbol === 'undefined' ? null : unapply(Symbol.prototype.toString);
const objectHasOwnProperty = unapply(Object.prototype.hasOwnProperty);
const objectToString = unapply(Object.prototype.toString);
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 func - The function to be wrapped and called.
* @returns A new function that calls the given function with a specified thisArg and arguments.
*/
function unapply(func) {
return function (thisArg) {
if (thisArg instanceof RegExp) {
thisArg.lastIndex = 0;
}
for (var _len3 = arguments.length, args = new Array(_len3 > 1 ? _len3 - 1 : 0), _key3 = 1; _key3 < _len3; _key3++) {
args[_key3 - 1] = arguments[_key3];
}
return apply(func, thisArg, args);
};
}
/**
* Creates a new function that constructs an instance of the given constructor function with the provided arguments.
*
* @param func - The constructor function to be wrapped and called.
* @returns A new function that constructs an instance of the given constructor function with the provided arguments.
*/
function unconstruct(Func) {
return function () {
for (var _len4 = arguments.length, args = new Array(_len4), _key4 = 0; _key4 < _len4; _key4++) {
args[_key4] = arguments[_key4];
}
return construct(Func, args);
};
}
/**
* Add properties to a lookup table
*
* @param set - The set to which elements will be added.
* @param array - The array containing elements to be added to the set.
* @param transformCaseFunc - An optional function to transform the case of each element before adding to the set.
* @returns 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);
}
if (!arrayIsArray(array)) {
return set;
}
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 - The array to be cleaned.
* @returns 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 - The object to be cloned.
* @returns A new object that copies the original.
*/
function clone(object) {
const newObject = create(null);
for (const _ref2 of entries(object)) {
var _ref3 = _slicedToArray(_ref2, 2);
const property = _ref3[0];
const value = _ref3[1];
const isPropertyExist = objectHasOwnProperty(object, property);
if (isPropertyExist) {
if (arrayIsArray(value)) {
newObject[property] = cleanArray(value);
} else if (value && typeof value === 'object' && value.constructor === Object) {
newObject[property] = clone(value);
} else {
newObject[property] = value;
}
}
}
return newObject;
}
/**
* Convert non-node values into strings without depending on direct property access.
*
* @param value - The value to stringify.
* @returns A string representation of the provided value.
*/
function stringifyValue(value) {
switch (typeof value) {
case 'string':
{
return value;
}
case 'number':
{
return numberToString(value);
}
case 'boolean':
{
return booleanToString(value);
}
case 'bigint':
{
return bigintToString ? bigintToString(value) : '0';
}
case 'symbol':
{
return symbolToString ? symbolToString(value) : 'Symbol()';
}
case 'undefined':
{
return objectToString(value);
}
case 'function':
case 'object':
{
if (value === null) {
return objectToString(value);
}
const valueAsRecord = value;
const valueToString = lookupGetter(valueAsRecord, 'toString');
if (typeof valueToString === 'function') {
const stringified = valueToString(valueAsRecord);
return typeof stringified === 'string' ? stringified : objectToString(stringified);
}
return objectToString(value);
}
default:
{
return objectToString(value);
}
}
}
/**
* This method automatically checks if the prop is function or getter and behaves accordingly.
*
* @param object - The object to look up the getter function in its prototype chain.
* @param prop - The property name for which to find the getter function.
* @returns 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;
}
function isRegex(value) {
try {
regExpTest(value, '');
return true;
} catch (_unused) {
return false;
}
}
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', 'search', 'section', 'select', 'shadow', 'slot', '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']);
const svg$1 = freeze(['svg', 'a', 'altglyph', 'altglyphdef', 'altglyphitem', 'animatecolor', 'animatemotion', 'animatetransform', 'circle', 'clippath', 'defs', 'desc', 'ellipse', 'enterkeyhint', 'exportparts', 'filter', 'font', 'g', 'glyph', 'glyphref', 'hkern', 'image', 'inputmode', 'line', 'lineargradient', 'marker', 'mask', 'metadata', 'mpath', 'part', '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', 'command', 'commandfor', 'controls', 'controlslist', 'coords', 'crossorigin', 'datetime', 'decoding', 'default', 'dir', 'disabled', 'disablepictureinpicture', 'disableremoteplayback', 'download', 'draggable', 'enctype', 'enterkeyhint', 'exportparts', 'face', 'for', 'headers', 'height', 'hidden', 'high', 'href', 'hreflang', 'id', 'inert', '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', 'part', 'pattern', 'placeholder', 'playsinline', 'popover', 'popovertarget', 'popovertargetaction', 'poster', 'preload', 'pubdate', 'radiogroup', 'readonly', 'rel', 'required', 'rev', 'reversed', 'role', 'rows', 'rowspan', 'spellcheck', 'scope', 'selected', 'shape', 'size', 'sizes', 'slot', 'span', 'srclang', 'start', 'src', 'srcset', 'step', 'style', 'summary', 'tabindex', 'title', 'translate', 'type', 'usemap', 'valign', 'value', 'width', 'wrap', 'xmlns']);
const svg = freeze(['accent-height', 'accumulate', 'additive', 'alignment-baseline', 'amplitude', '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', 'exponent', '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', 'intercept', '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', 'mask-type', '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', 'slope', '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', 'tablevalues', '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', 'columnalign', 'columnlines', 'columnspacing', 'columnspan', 'denomalign', 'depth', 'dir', 'display', 'displaystyle', 'encoding', 'fence', 'frame', 'height', 'href', 'id', 'largeop', 'length', 'linethickness', 'lquote', 'lspace', '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']);
const MUSTACHE_EXPR = seal(/{{[\w\W]*|^[\w\W]*}}/g);
const ERB_EXPR = seal(/<%[\w\W]*|^[\w\W]*%>/g);
const TMPLIT_EXPR = seal(/\${[\w\W]*/g);
const DATA_ATTR = seal(/^data-[\-\w.\u00B7-\uFFFF]+$/); // eslint-disable-line no-useless-escape
const ARIA_ATTR = seal(/^aria-[\-\w]+$/); // eslint-disable-line no-useless-escape
const IS_ALLOWED_URI = seal(/^(?:(?:(?:f|ht)tps?|mailto|tel|callto|sms|cid|xmpp|matrix):|[^a-z]|[a-z+.\-]+(?:[^a-z+.\-:]|$))/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);
// Markup-significant character probes used by _sanitizeElements.
// Shared module-level instances are safe despite the sticky /g flags:
// unapply() resets lastIndex for RegExp receivers before every call.
const ELEMENT_MARKUP_PROBE = seal(/<[/\w!]/g);
const COMMENT_MARKUP_PROBE = seal(/<[/\w]/g);
const FALLBACK_TAG_CLOSE = seal(/<\/no(script|embed|frames)/i);
const SELF_CLOSING_TAG = seal(/\/>/i);
// 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
processingInstruction: 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 trustedTypes The policy factory.
* @param purifyHostElement The Script element used to load DOMPurify (to determine policy name suffix).
* @return 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;
}
};
const _createHooksMap = function _createHooksMap() {
return {
afterSanitizeAttributes: [],
afterSanitizeElements: [],
afterSanitizeShadowDOM: [],
beforeSanitizeAttributes: [],
beforeSanitizeElements: [],
beforeSanitizeShadowDOM: [],
uponSanitizeAttribute: [],
uponSanitizeElement: [],
uponSanitizeShadowNode: []
};
};
/**
* Resolve a set-valued configuration option: a fresh set built from
* cfg[key] when it is an own array property (seeded with a clone of
* options.base when given, case-normalized via options.transform),
* the fallback set otherwise.
*
* @param cfg the cloned, prototype-free configuration object
* @param key the configuration property to read
* @param fallback the set to use when the option is absent or not an array
* @param options transform and optional base set to merge into
* @returns the resolved set
*/
const _resolveSetOption = function _resolveSetOption(cfg, key, fallback, options) {
return objectHasOwnProperty(cfg, key) && arrayIsArray(cfg[key]) ? addToSet(options.base ? clone(options.base) : {}, cfg[key], options.transform) : fallback;
};
function createDOMPurify() {
let window = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : getGlobal();
const DOMPurify = root => createDOMPurify(root);
DOMPurify.version = '3.4.11';
DOMPurify.removed = [];
if (!window || !window.document || window.document.nodeType !== NODE_TYPE.document || !window.Element) {
// 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.document;
const originalDocument = document;
const currentScript = originalDocument.currentScript;
window.DocumentFragment;
const HTMLTemplateElement = window.HTMLTemplateElement,
Node = window.Node,
Element = window.Element,
NodeFilter = window.NodeFilter,
_window$NamedNodeMap = window.NamedNodeMap;
_window$NamedNodeMap === void 0 ? window.NamedNodeMap || window.MozNamedAttrMap : _window$NamedNodeMap;
window.HTMLFormElement;
const DOMParser = window.DOMParser,
trustedTypes = window.trustedTypes;
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');
const getShadowRoot = lookupGetter(ElementPrototype, 'shadowRoot');
const getAttributes = lookupGetter(ElementPrototype, 'attributes');
const getNodeType = Node && Node.prototype ? lookupGetter(Node.prototype, 'nodeType') : null;
const getNodeName = Node && Node.prototype ? lookupGetter(Node.prototype, 'nodeName') : null;
// 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 = '';
// The instance's own internal Trusted Types policy. Unlike a caller-supplied
// `TRUSTED_TYPES_POLICY`, this is created at most once — Trusted Types throws
// on duplicate policy names — and is the only policy allowed to persist
// across configurations and survive `clearConfig()`.
let defaultTrustedTypesPolicy;
let defaultTrustedTypesPolicyResolved = false;
// Tracks whether we are already inside a call to the configured Trusted Types
// policy (`createHTML` or `createScriptURL`). If a supplied policy callback
// itself calls `DOMPurify.sanitize` (the cause of #1422), `sanitize` would
// re-enter the policy and recurse until the stack overflows. We detect that
// re-entry and throw a clear, actionable error instead. The guard is shared
// across both callbacks, because either one re-entering `sanitize` triggers
// the same unbounded recursion.
let IN_TRUSTED_TYPES_POLICY = 0;
const _assertNotInTrustedTypesPolicy = function _assertNotInTrustedTypesPolicy() {
if (IN_TRUSTED_TYPES_POLICY > 0) {
throw typeErrorCreate('A configured TRUSTED_TYPES_POLICY callback (createHTML or ' + 'createScriptURL) must not call DOMPurify.sanitize, as that causes ' + 'infinite recursion. Do not pass a policy whose callbacks wrap ' + 'DOMPurify as TRUSTED_TYPES_POLICY; see the "DOMPurify and Trusted ' + 'Types" section of the README.');
}
};
const _createTrustedHTML = function _createTrustedHTML(html) {
_assertNotInTrustedTypesPolicy();
IN_TRUSTED_TYPES_POLICY++;
try {
return trustedTypesPolicy.createHTML(html);
} finally {
IN_TRUSTED_TYPES_POLICY--;
}
};
const _createTrustedScriptURL = function _createTrustedScriptURL(scriptUrl) {
_assertNotInTrustedTypesPolicy();
IN_TRUSTED_TYPES_POLICY++;
try {
return trustedTypesPolicy.createScriptURL(scriptUrl);
} finally {
IN_TRUSTED_TYPES_POLICY--;
}
};
// Lazily resolve (and cache) the instance's internal default policy.
// Resolution is attempted at most once: a successful `createPolicy` cannot be
// repeated (Trusted Types throws on duplicate names), and a failed or
// unsupported attempt must not be retried on every parse.
const _getDefaultTrustedTypesPolicy = function _getDefaultTrustedTypesPolicy() {
if (!defaultTrustedTypesPolicyResolved) {
defaultTrustedTypesPolicy = _createTrustedTypesPolicy(trustedTypes, currentScript);
defaultTrustedTypesPolicyResolved = true;
}
return defaultTrustedTypesPolicy;
};
const _document = document,
implementation = _document.implementation,
createNodeIterator = _document.createNodeIterator,
createDocumentFragment = _document.createDocumentFragment,
getElementsByTagName = _document.getElementsByTagName;
const importNode = originalDocument.importNode;
let hooks = _createHooksMap();
/**
* Expose whether this browser supports running the full DOMPurify.
*/
DOMPurify.isSupported = typeof entries === 'function' && typeof getParentNode === 'function' && implementation && implementation.createHTMLDocument !== undefined;
const 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,
CUSTOM_ELEMENT$1 = CUSTOM_ELEMENT;
let 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 */
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;
/* Config object to store ADD_TAGS/ADD_ATTR functions (when used as functions) */
const EXTRA_ELEMENT_HANDLING = Object.seal(create(null, {
tagCheck: {
writable: true,
configurable: false,
enumerable: true,
value: null
},
attributeCheck: {
writable: true,
configurable: false,
enumerable: true,
value: 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;
/* Pristine allowlist bindings captured at setConfig() time. On the
* persistent-config path sanitize() restores the sets from these before
* the per-walk hook clone-guard, so a hook's in-call widening cannot
* carry across calls. Null until setConfig() is called; reset by
* clearConfig(). */
let SET_CONFIG_ALLOWED_TAGS = null;
let SET_CONFIG_ALLOWED_ATTR = null;
/* 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',
// <selectedcontent> mirrors the selected <option>'s subtree, cloned by
// the UA (customizable <select>) — including any on* handlers — and the
// engine re-mirrors synchronously whenever a removal changes which
// option/selectedcontent is current, even inside DOMPurify's inert
// DOMParser document. Hoisting its children on removal re-inserts a fresh
// mirror target ahead of the walk, which the engine refills, looping
// forever (DoS) and amplifying output. Dropping its content on removal
// (rather than hoisting) breaks that cascade; the content is a duplicate
// of the option, which is sanitized on its own. See campaign-3 F1/F6.
'selectedcontent', '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);
const DEFAULT_MATHML_TEXT_INTEGRATION_POINTS = freeze(['mi', 'mo', 'mn', 'ms', 'mtext']);
let MATHML_TEXT_INTEGRATION_POINTS = addToSet({}, DEFAULT_MATHML_TEXT_INTEGRATION_POINTS);
const DEFAULT_HTML_INTEGRATION_POINTS = freeze(['annotation-xml']);
let HTML_INTEGRATION_POINTS = addToSet({}, DEFAULT_HTML_INTEGRATION_POINTS);
// 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']);
/* 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 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 = _resolveSetOption(cfg, 'ALLOWED_TAGS', DEFAULT_ALLOWED_TAGS, {
transform: transformCaseFunc
});
ALLOWED_ATTR = _resolveSetOption(cfg, 'ALLOWED_ATTR', DEFAULT_ALLOWED_ATTR, {
transform: transformCaseFunc
});
ALLOWED_NAMESPACES = _resolveSetOption(cfg, 'ALLOWED_NAMESPACES', DEFAULT_ALLOWED_NAMESPACES, {
transform: stringToString
});
URI_SAFE_ATTRIBUTES = _resolveSetOption(cfg, 'ADD_URI_SAFE_ATTR', DEFAULT_URI_SAFE_ATTRIBUTES, {
transform: transformCaseFunc,
base: DEFAULT_URI_SAFE_ATTRIBUTES
});
DATA_URI_TAGS = _resolveSetOption(cfg, 'ADD_DATA_URI_TAGS', DEFAULT_DATA_URI_TAGS, {
transform: transformCaseFunc,
base: DEFAULT_DATA_URI_TAGS
});
FORBID_CONTENTS = _resolveSetOption(cfg, 'FORBID_CONTENTS', DEFAULT_FORBID_CONTENTS, {
transform: transformCaseFunc
});
FORBID_TAGS = _resolveSetOption(cfg, 'FORBID_TAGS', clone({}), {
transform: transformCaseFunc
});
FORBID_ATTR = _resolveSetOption(cfg, 'FORBID_ATTR', clone({}), {
transform: transformCaseFunc
});
USE_PROFILES = objectHasOwnProperty(cfg, 'USE_PROFILES') ? cfg.USE_PROFILES && typeof cfg.USE_PROFILES === 'object' ? clone(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 = isRegex(cfg.ALLOWED_URI_REGEXP) ? cfg.ALLOWED_URI_REGEXP : IS_ALLOWED_URI; // Default regexp
NAMESPACE = typeof cfg.NAMESPACE === 'string' ? cfg.NAMESPACE : HTML_NAMESPACE; // Default HTML namespace
MATHML_TEXT_INTEGRATION_POINTS = objectHasOwnProperty(cfg, 'MATHML_TEXT_INTEGRATION_POINTS') && cfg.MATHML_TEXT_INTEGRATION_POINTS && typeof cfg.MATHML_TEXT_INTEGRATION_POINTS === 'object' ? clone(cfg.MATHML_TEXT_INTEGRATION_POINTS) : addToSet({}, DEFAULT_MATHML_TEXT_INTEGRATION_POINTS); // Default built-in map
HTML_INTEGRATION_POINTS = objectHasOwnProperty(cfg, 'HTML_INTEGRATION_POINTS') && cfg.HTML_INTEGRATION_POINTS && typeof cfg.HTML_INTEGRATION_POINTS === 'object' ? clone(cfg.HTML_INTEGRATION_POINTS) : addToSet({}, DEFAULT_HTML_INTEGRATION_POINTS); // Default built-in map
const customElementHandling = objectHasOwnProperty(cfg, 'CUSTOM_ELEMENT_HANDLING') && cfg.CUSTOM_ELEMENT_HANDLING && typeof cfg.CUSTOM_ELEMENT_HANDLING === 'object' ? clone(cfg.CUSTOM_ELEMENT_HANDLING) : create(null);
CUSTOM_ELEMENT_HANDLING = create(null);
if (objectHasOwnProperty(customElementHandling, 'tagNameCheck') && isRegexOrFunction(customElementHandling.tagNameCheck)) {
CUSTOM_ELEMENT_HANDLING.tagNameCheck = customElementHandling.tagNameCheck; // Default undefined
}
if (objectHasOwnProperty(customElementHandling, 'attributeNameCheck') && isRegexOrFunction(customElementHandling.attributeNameCheck)) {
CUSTOM_ELEMENT_HANDLING.attributeNameCheck = customElementHandling.attributeNameCheck; // Default undefined
}
if (objectHasOwnProperty(customElementHandling, 'allowCustomizedBuiltInElements') && typeof customElementHandling.allowCustomizedBuiltInElements === 'boolean') {
CUSTOM_ELEMENT_HANDLING.allowCustomizedBuiltInElements = customElementHandling.allowCustomizedBuiltInElements; // Default undefined
}
seal(CUSTOM_ELEMENT_HANDLING);
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 = create(null);
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);
}
}
/* Always reset function-based ADD_TAGS / ADD_ATTR checks to prevent
* leaking across calls when switching from function to array config */
EXTRA_ELEMENT_HANDLING.tagCheck = null;
EXTRA_ELEMENT_HANDLING.attributeCheck = null;
/* Merge configuration parameters */
if (objectHasOwnProperty(cfg, 'ADD_TAGS')) {
if (typeof cfg.ADD_TAGS === 'function') {
EXTRA_ELEMENT_HANDLING.tagCheck = cfg.ADD_TAGS;
} else if (arrayIsArray(cfg.ADD_TAGS)) {
if (ALLOWED_TAGS === DEFAULT_ALLOWED_TAGS) {
ALLOWED_TAGS = clone(ALLOWED_TAGS);
}
addToSet(ALLOWED_TAGS, cfg.ADD_TAGS, transformCaseFunc);
}
}
if (objectHasOwnProperty(cfg, 'ADD_ATTR')) {
if (typeof cfg.ADD_ATTR === 'function') {
EXTRA_ELEMENT_HANDLING.attributeCheck = cfg.ADD_ATTR;
} else if (arrayIsArray(cfg.ADD_ATTR)) {
if (ALLOWED_ATTR === DEFAULT_ALLOWED_ATTR) {
ALLOWED_ATTR = clone(ALLOWED_ATTR);
}
addToSet(ALLOWED_ATTR, cfg.ADD_ATTR, transformCaseFunc);
}
}
if (objectHasOwnProperty(cfg, 'ADD_URI_SAFE_ATTR') && arrayIsArray(cfg.ADD_URI_SAFE_ATTR)) {
addToSet(URI_SAFE_ATTRIBUTES, cfg.ADD_URI_SAFE_ATTR, transformCaseFunc);
}
if (objectHasOwnProperty(cfg, 'FORBID_CONTENTS') && arrayIsArray(cfg.FORBID_CONTENTS)) {
if (FORBID_CONTENTS === DEFAULT_FORBID_CONTENTS) {
FORBID_CONTENTS = clone(FORBID_CONTENTS);
}
addToSet(FORBID_CONTENTS, cfg.FORBID_CONTENTS, transformCaseFunc);
}
if (objectHasOwnProperty(cfg, 'ADD_FORBID_CONTENTS') && arrayIsArray(cfg.ADD_FORBID_CONTENTS)) {
if (FORBID_CONTENTS === DEFAULT_FORBID_CONTENTS) {
FORBID_CONTENTS = clone(FORBID_CONTENTS);
}
addToSet(FORBID_CONTENTS, cfg.ADD_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;
}
// Re-derive the active Trusted Types policy from this configuration on
// every parse. The active policy must never be sticky closure state that
// outlives the config that set it: a caller-supplied policy left in place
// after `clearConfig()` — or after a later call that supplied none, or
// `TRUSTED_TYPES_POLICY: null` — could sign a subsequent "default"
// `RETURN_TRUSTED_TYPE` result with a foreign, possibly unsafe policy.
// See GHSA-vxr8-fq34-vvx9.
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.');
}
// A caller-supplied policy applies to this configuration only.
const previousTrustedTypesPolicy = trustedTypesPolicy;
trustedTypesPolicy = cfg.TRUSTED_TYPES_POLICY;
// Sign local variables required by `sanitize`. If the supplied policy's
// `createHTML` is circular (i.e. it calls `DOMPurify.sanitize`), this
// throws via the re-entrancy guard. Restore the previous policy first so
// the instance is not left in a poisoned state. See #1422.
try {
emptyHTML = _createTrustedHTML('');
} catch (error) {
trustedTypesPolicy = previousTrustedTypesPolicy;
throw error;
}
} else if (cfg.TRUSTED_TYPES_POLICY === null) {
// Explicit opt-out for this call: perform no Trusted Types signing and
// create nothing (so a strict `trusted-types` CSP that disallows a
// `dompurify` policy can still call `sanitize` from inside its own
// policy — see #1422). Resetting to `undefined` rather than a sticky
// `null` also drops any previously retained caller policy, so it cannot
// resurface on a later call, while still allowing the next config-less
// call to restore the internal default policy. See GHSA-vxr8-fq34-vvx9.
trustedTypesPolicy = undefined;
emptyHTML = '';
} else {
// No policy supplied: keep the currently active policy if one is set — a
// previously supplied policy is intentionally sticky across config-less
// calls — otherwise fall back to the instance's own internal policy,
// created at most once. (A policy supplied for a *single* call still
// lingers by design; what must not linger is a policy whose configuration
// has been torn down via `clearConfig()`, which restores the default.)
if (trustedTypesPolicy === undefined) {
trustedTypesPolicy = _getDefaultTrustedTypesPolicy();
}
// Sign internal variables only when a policy is active. A falsy policy
// (Trusted Types unsupported, creation failed, or an explicit opt-out)
// leaves `emptyHTML` as a plain string, so we never call `.createHTML` on
// a non-policy and throw. See #1422.
if (trustedTypesPolicy && typeof emptyHTML === 'string') {
emptyHTML = _createTrustedHTML('');
}
}
// Prevent further manipulation of configuration.
// Not available in IE8, Safari 5, etc.
if (freeze) {
freeze(cfg);
}
CONFIG = cfg;
};
/* 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]);
/**
* Namespace rules for an element in the SVG namespace.
*
* @param tagName the element's lowercase tag name
* @param parent the (possibly simulated) parent node
* @param parentTagName the parent's lowercase tag name
* @returns true if a spec-compliant parser could produce this element
*/
const _checkSvgNamespace = function _checkSvgNamespace(tagName, parent, parentTagName) {
// 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 the parent is either <annotation-xml> or a MathML
// text integration point.
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]);
};
/**
* Namespace rules for an element in the MathML namespace.
*
* @param tagName the element's lowercase tag name
* @param parent the (possibly simulated) parent node
* @param parentTagName the parent's lowercase tag name
* @returns true if a spec-compliant parser could produce this element
*/
const _checkMathMlNamespace = function _checkMathMlNamespace(tagName, parent, parentTagName) {
// 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 swi