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purify.js
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purify.js
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/*! @license DOMPurify 2.3.0 | (c) Cure53 and other contributors | Released under the Apache license 2.0 and Mozilla Public License 2.0 | github.com/cure53/DOMPurify/blob/2.3.0/LICENSE */
(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
typeof define === 'function' && define.amd ? define(factory) :
(global = global || self, global.DOMPurify = factory());
}(this, function () { 'use strict';
function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } }
var hasOwnProperty = Object.hasOwnProperty,
setPrototypeOf = Object.setPrototypeOf,
isFrozen = Object.isFrozen,
getPrototypeOf = Object.getPrototypeOf,
getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;
var freeze = Object.freeze,
seal = Object.seal,
create = Object.create; // eslint-disable-line import/no-mutable-exports
var _ref = typeof Reflect !== 'undefined' && Reflect,
apply = _ref.apply,
construct = _ref.construct;
if (!apply) {
apply = function apply(fun, thisValue, args) {
return fun.apply(thisValue, args);
};
}
if (!freeze) {
freeze = function freeze(x) {
return x;
};
}
if (!seal) {
seal = function seal(x) {
return x;
};
}
if (!construct) {
construct = function construct(Func, args) {
return new (Function.prototype.bind.apply(Func, [null].concat(_toConsumableArray(args))))();
};
}
var arrayForEach = unapply(Array.prototype.forEach);
var arrayPop = unapply(Array.prototype.pop);
var arrayPush = unapply(Array.prototype.push);
var stringToLowerCase = unapply(String.prototype.toLowerCase);
var stringMatch = unapply(String.prototype.match);
var stringReplace = unapply(String.prototype.replace);
var stringIndexOf = unapply(String.prototype.indexOf);
var stringTrim = unapply(String.prototype.trim);
var regExpTest = unapply(RegExp.prototype.test);
var typeErrorCreate = unconstruct(TypeError);
function unapply(func) {
return function (thisArg) {
for (var _len = arguments.length, args = Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
args[_key - 1] = arguments[_key];
}
return apply(func, thisArg, args);
};
}
function unconstruct(func) {
return function () {
for (var _len2 = arguments.length, args = Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
args[_key2] = arguments[_key2];
}
return construct(func, args);
};
}
/* Add properties to a lookup table */
function addToSet(set, array) {
if (setPrototypeOf) {
// Make 'in' and truthy checks like Boolean(set.constructor)
// independent of any properties defined on Object.prototype.
// Prevent prototype setters from intercepting set as a this value.
setPrototypeOf(set, null);
}
var l = array.length;
while (l--) {
var element = array[l];
if (typeof element === 'string') {
var lcElement = stringToLowerCase(element);
if (lcElement !== element) {
// Config presets (e.g. tags.js, attrs.js) are immutable.
if (!isFrozen(array)) {
array[l] = lcElement;
}
element = lcElement;
}
}
set[element] = true;
}
return set;
}
/* Shallow clone an object */
function clone(object) {
var newObject = create(null);
var property = void 0;
for (property in object) {
if (apply(hasOwnProperty, object, [property])) {
newObject[property] = object[property];
}
}
return newObject;
}
/* IE10 doesn't support __lookupGetter__ so lets'
* simulate it. It also automatically checks
* if the prop is function or getter and behaves
* accordingly. */
function lookupGetter(object, prop) {
while (object !== null) {
var desc = getOwnPropertyDescriptor(object, prop);
if (desc) {
if (desc.get) {
return unapply(desc.get);
}
if (typeof desc.value === 'function') {
return unapply(desc.value);
}
}
object = getPrototypeOf(object);
}
function fallbackValue(element) {
console.warn('fallback value for', element);
return null;
}
return fallbackValue;
}
var html = freeze(['a', 'abbr', 'acronym', 'address', 'area', 'article', 'aside', 'audio', 'b', 'bdi', 'bdo', 'big', 'blink', 'blockquote', 'body', 'br', 'button', 'canvas', 'caption', 'center', 'cite', 'code', 'col', 'colgroup', 'content', 'data', 'datalist', 'dd', 'decorator', 'del', 'details', 'dfn', 'dialog', 'dir', 'div', 'dl', 'dt', 'element', 'em', 'fieldset', 'figcaption', 'figure', 'font', 'footer', 'form', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'head', 'header', 'hgroup', 'hr', 'html', 'i', 'img', 'input', 'ins', 'kbd', 'label', 'legend', 'li', 'main', 'map', 'mark', 'marquee', 'menu', 'menuitem', 'meter', 'nav', 'nobr', 'ol', 'optgroup', 'option', 'output', 'p', 'picture', 'pre', 'progress', 'q', 'rp', 'rt', 'ruby', 's', 'samp', 'section', 'select', 'shadow', 'small', 'source', 'spacer', 'span', 'strike', 'strong', 'style', 'sub', 'summary', 'sup', 'table', 'tbody', 'td', 'template', 'textarea', 'tfoot', 'th', 'thead', 'time', 'tr', 'track', 'tt', 'u', 'ul', 'var', 'video', 'wbr']);
// SVG
var svg = freeze(['svg', 'a', 'altglyph', 'altglyphdef', 'altglyphitem', 'animatecolor', 'animatemotion', 'animatetransform', 'circle', 'clippath', 'defs', 'desc', 'ellipse', 'filter', 'font', 'g', 'glyph', 'glyphref', 'hkern', 'image', 'line', 'lineargradient', 'marker', 'mask', 'metadata', 'mpath', 'path', 'pattern', 'polygon', 'polyline', 'radialgradient', 'rect', 'stop', 'style', 'switch', 'symbol', 'text', 'textpath', 'title', 'tref', 'tspan', 'view', 'vkern']);
var svgFilters = freeze(['feBlend', 'feColorMatrix', 'feComponentTransfer', 'feComposite', 'feConvolveMatrix', 'feDiffuseLighting', 'feDisplacementMap', 'feDistantLight', 'feFlood', 'feFuncA', 'feFuncB', 'feFuncG', 'feFuncR', 'feGaussianBlur', 'feMerge', 'feMergeNode', 'feMorphology', 'feOffset', 'fePointLight', 'feSpecularLighting', 'feSpotLight', 'feTile', 'feTurbulence']);
// List of SVG elements that are disallowed by default.
// We still need to know them so that we can do namespace
// checks properly in case one wants to add them to
// allow-list.
var svgDisallowed = freeze(['animate', 'color-profile', 'cursor', 'discard', 'fedropshadow', 'feimage', 'font-face', 'font-face-format', 'font-face-name', 'font-face-src', 'font-face-uri', 'foreignobject', 'hatch', 'hatchpath', 'mesh', 'meshgradient', 'meshpatch', 'meshrow', 'missing-glyph', 'script', 'set', 'solidcolor', 'unknown', 'use']);
var mathMl = freeze(['math', 'menclose', 'merror', 'mfenced', 'mfrac', 'mglyph', 'mi', 'mlabeledtr', 'mmultiscripts', 'mn', 'mo', 'mover', 'mpadded', 'mphantom', 'mroot', 'mrow', 'ms', 'mspace', 'msqrt', 'mstyle', 'msub', 'msup', 'msubsup', 'mtable', 'mtd', 'mtext', 'mtr', 'munder', 'munderover']);
// Similarly to SVG, we want to know all MathML elements,
// even those that we disallow by default.
var mathMlDisallowed = freeze(['maction', 'maligngroup', 'malignmark', 'mlongdiv', 'mscarries', 'mscarry', 'msgroup', 'mstack', 'msline', 'msrow', 'semantics', 'annotation', 'annotation-xml', 'mprescripts', 'none']);
var text = freeze(['#text']);
var html$1 = 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', 'noshade', 'novalidate', 'nowrap', 'open', 'optimum', 'pattern', 'placeholder', 'playsinline', 'poster', 'preload', 'pubdate', 'radiogroup', 'readonly', 'rel', 'required', 'rev', 'reversed', 'role', 'rows', 'rowspan', 'spellcheck', 'scope', 'selected', 'shape', 'size', 'sizes', 'span', 'srclang', 'start', 'src', 'srcset', 'step', 'style', 'summary', 'tabindex', 'title', 'translate', 'type', 'usemap', 'valign', 'value', 'width', 'xmlns', 'slot']);
var svg$1 = 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', 'text-anchor', 'text-decoration', 'text-rendering', 'textlength', 'type', 'u1', 'u2', 'unicode', 'values', 'viewbox', 'visibility', 'version', 'vert-adv-y', 'vert-origin-x', 'vert-origin-y', 'width', 'word-spacing', 'wrap', 'writing-mode', 'xchannelselector', 'ychannelselector', 'x', 'x1', 'x2', 'xmlns', 'y', 'y1', 'y2', 'z', 'zoomandpan']);
var mathMl$1 = freeze(['accent', 'accentunder', 'align', 'bevelled', 'close', 'columnsalign', 'columnlines', 'columnspan', 'denomalign', 'depth', 'dir', 'display', 'displaystyle', 'encoding', 'fence', 'frame', 'height', 'href', 'id', 'largeop', 'length', 'linethickness', 'lspace', 'lquote', 'mathbackground', 'mathcolor', 'mathsize', 'mathvariant', 'maxsize', 'minsize', 'movablelimits', 'notation', 'numalign', 'open', 'rowalign', 'rowlines', 'rowspacing', 'rowspan', 'rspace', 'rquote', 'scriptlevel', 'scriptminsize', 'scriptsizemultiplier', 'selection', 'separator', 'separators', 'stretchy', 'subscriptshift', 'supscriptshift', 'symmetric', 'voffset', 'width', 'xmlns']);
var xml = freeze(['xlink:href', 'xml:id', 'xlink:title', 'xml:space', 'xmlns:xlink']);
// eslint-disable-next-line unicorn/better-regex
var MUSTACHE_EXPR = seal(/\{\{[\s\S]*|[\s\S]*\}\}/gm); // Specify template detection regex for SAFE_FOR_TEMPLATES mode
var ERB_EXPR = seal(/<%[\s\S]*|[\s\S]*%>/gm);
var DATA_ATTR = seal(/^data-[\-\w.\u00B7-\uFFFF]/); // eslint-disable-line no-useless-escape
var ARIA_ATTR = seal(/^aria-[\-\w]+$/); // eslint-disable-line no-useless-escape
var IS_ALLOWED_URI = seal(/^(?:(?:(?:f|ht)tps?|mailto|tel|callto|cid|xmpp):|[^a-z]|[a-z+.\-]+(?:[^a-z+.\-:]|$))/i // eslint-disable-line no-useless-escape
);
var IS_SCRIPT_OR_DATA = seal(/^(?:\w+script|data):/i);
var ATTR_WHITESPACE = seal(/[\u0000-\u0020\u00A0\u1680\u180E\u2000-\u2029\u205F\u3000]/g // eslint-disable-line no-control-regex
);
var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
function _toConsumableArray$1(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } }
var getGlobal = function getGlobal() {
return typeof window === 'undefined' ? null : window;
};
/**
* Creates a no-op policy for internal use only.
* Don't export this function outside this module!
* @param {?TrustedTypePolicyFactory} trustedTypes The policy factory.
* @param {Document} document The document object (to determine policy name suffix)
* @return {?TrustedTypePolicy} The policy created (or null, if Trusted Types
* are not supported).
*/
var _createTrustedTypesPolicy = function _createTrustedTypesPolicy(trustedTypes, document) {
if ((typeof trustedTypes === 'undefined' ? 'undefined' : _typeof(trustedTypes)) !== 'object' || typeof trustedTypes.createPolicy !== 'function') {
return null;
}
// Allow the callers to control the unique policy name
// by adding a data-tt-policy-suffix to the script element with the DOMPurify.
// Policy creation with duplicate names throws in Trusted Types.
var suffix = null;
var ATTR_NAME = 'data-tt-policy-suffix';
if (document.currentScript && document.currentScript.hasAttribute(ATTR_NAME)) {
suffix = document.currentScript.getAttribute(ATTR_NAME);
}
var policyName = 'dompurify' + (suffix ? '#' + suffix : '');
try {
return trustedTypes.createPolicy(policyName, {
createHTML: function createHTML(html$$1) {
return html$$1;
}
});
} catch (_) {
// Policy creation failed (most likely another DOMPurify script has
// already run). Skip creating the policy, as this will only cause errors
// if TT are enforced.
console.warn('TrustedTypes policy ' + policyName + ' could not be created.');
return null;
}
};
function createDOMPurify() {
var window = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : getGlobal();
var DOMPurify = function DOMPurify(root) {
return createDOMPurify(root);
};
/**
* Version label, exposed for easier checks
* if DOMPurify is up to date or not
*/
DOMPurify.version = '2.3.0';
/**
* Array of elements that DOMPurify removed during sanitation.
* Empty if nothing was removed.
*/
DOMPurify.removed = [];
if (!window || !window.document || window.document.nodeType !== 9) {
// Not running in a browser, provide a factory function
// so that you can pass your own Window
DOMPurify.isSupported = false;
return DOMPurify;
}
var originalDocument = window.document;
var document = window.document;
var DocumentFragment = window.DocumentFragment,
HTMLTemplateElement = window.HTMLTemplateElement,
Node = window.Node,
Element = window.Element,
NodeFilter = window.NodeFilter,
_window$NamedNodeMap = window.NamedNodeMap,
NamedNodeMap = _window$NamedNodeMap === undefined ? window.NamedNodeMap || window.MozNamedAttrMap : _window$NamedNodeMap,
Text = window.Text,
Comment = window.Comment,
DOMParser = window.DOMParser,
trustedTypes = window.trustedTypes;
var ElementPrototype = Element.prototype;
var cloneNode = lookupGetter(ElementPrototype, 'cloneNode');
var getNextSibling = lookupGetter(ElementPrototype, 'nextSibling');
var getChildNodes = lookupGetter(ElementPrototype, 'childNodes');
var getParentNode = lookupGetter(ElementPrototype, 'parentNode');
// As per issue #47, the web-components registry is inherited by a
// new document created via createHTMLDocument. As per the spec
// (http://w3c.github.io/webcomponents/spec/custom/#creating-and-passing-registries)
// a new empty registry is used when creating a template contents owner
// document, so we use that as our parent document to ensure nothing
// is inherited.
if (typeof HTMLTemplateElement === 'function') {
var template = document.createElement('template');
if (template.content && template.content.ownerDocument) {
document = template.content.ownerDocument;
}
}
var trustedTypesPolicy = _createTrustedTypesPolicy(trustedTypes, originalDocument);
var emptyHTML = trustedTypesPolicy && RETURN_TRUSTED_TYPE ? trustedTypesPolicy.createHTML('') : '';
var _document = document,
implementation = _document.implementation,
createNodeIterator = _document.createNodeIterator,
createDocumentFragment = _document.createDocumentFragment,
getElementsByTagName = _document.getElementsByTagName;
var importNode = originalDocument.importNode;
var documentMode = {};
try {
documentMode = clone(document).documentMode ? document.documentMode : {};
} catch (_) {}
var hooks = {};
/**
* Expose whether this browser supports running the full DOMPurify.
*/
DOMPurify.isSupported = typeof getParentNode === 'function' && implementation && typeof implementation.createHTMLDocument !== 'undefined' && documentMode !== 9;
var MUSTACHE_EXPR$$1 = MUSTACHE_EXPR,
ERB_EXPR$$1 = ERB_EXPR,
DATA_ATTR$$1 = DATA_ATTR,
ARIA_ATTR$$1 = ARIA_ATTR,
IS_SCRIPT_OR_DATA$$1 = IS_SCRIPT_OR_DATA,
ATTR_WHITESPACE$$1 = ATTR_WHITESPACE;
var IS_ALLOWED_URI$$1 = IS_ALLOWED_URI;
/**
* We consider the elements and attributes below to be safe. Ideally
* don't add any new ones but feel free to remove unwanted ones.
*/
/* allowed element names */
var ALLOWED_TAGS = null;
var DEFAULT_ALLOWED_TAGS = addToSet({}, [].concat(_toConsumableArray$1(html), _toConsumableArray$1(svg), _toConsumableArray$1(svgFilters), _toConsumableArray$1(mathMl), _toConsumableArray$1(text)));
/* Allowed attribute names */
var ALLOWED_ATTR = null;
var DEFAULT_ALLOWED_ATTR = addToSet({}, [].concat(_toConsumableArray$1(html$1), _toConsumableArray$1(svg$1), _toConsumableArray$1(mathMl$1), _toConsumableArray$1(xml)));
/* Explicitly forbidden tags (overrides ALLOWED_TAGS/ADD_TAGS) */
var FORBID_TAGS = null;
/* Explicitly forbidden attributes (overrides ALLOWED_ATTR/ADD_ATTR) */
var FORBID_ATTR = null;
/* Decide if ARIA attributes are okay */
var ALLOW_ARIA_ATTR = true;
/* Decide if custom data attributes are okay */
var ALLOW_DATA_ATTR = true;
/* Decide if unknown protocols are okay */
var ALLOW_UNKNOWN_PROTOCOLS = false;
/* Output should be safe for common template engines.
* This means, DOMPurify removes data attributes, mustaches and ERB
*/
var SAFE_FOR_TEMPLATES = false;
/* Decide if document with <html>... should be returned */
var WHOLE_DOCUMENT = false;
/* Track whether config is already set on this instance of DOMPurify. */
var SET_CONFIG = false;
/* Decide if all elements (e.g. style, script) must be children of
* document.body. By default, browsers might move them to document.head */
var FORCE_BODY = false;
/* Decide if a DOM `HTMLBodyElement` should be returned, instead of a html
* string (or a TrustedHTML object if Trusted Types are supported).
* If `WHOLE_DOCUMENT` is enabled a `HTMLHtmlElement` will be returned instead
*/
var RETURN_DOM = false;
/* Decide if a DOM `DocumentFragment` should be returned, instead of a html
* string (or a TrustedHTML object if Trusted Types are supported) */
var RETURN_DOM_FRAGMENT = false;
/* If `RETURN_DOM` or `RETURN_DOM_FRAGMENT` is enabled, decide if the returned DOM
* `Node` is imported into the current `Document`. If this flag is not enabled the
* `Node` will belong (its ownerDocument) to a fresh `HTMLDocument`, created by
* DOMPurify.
*
* This defaults to `true` starting DOMPurify 2.2.0. Note that setting it to `false`
* might cause XSS from attacks hidden in closed shadowroots in case the browser
* supports Declarative Shadow: DOM https://web.dev/declarative-shadow-dom/
*/
var RETURN_DOM_IMPORT = true;
/* Try to return a Trusted Type object instead of a string, return a string in
* case Trusted Types are not supported */
var RETURN_TRUSTED_TYPE = false;
/* Output should be free from DOM clobbering attacks? */
var SANITIZE_DOM = true;
/* Keep element content when removing element? */
var KEEP_CONTENT = true;
/* If a `Node` is passed to sanitize(), then performs sanitization in-place instead
* of importing it into a new Document and returning a sanitized copy */
var IN_PLACE = false;
/* Allow usage of profiles like html, svg and mathMl */
var USE_PROFILES = {};
/* Tags to ignore content of when KEEP_CONTENT is true */
var FORBID_CONTENTS = addToSet({}, ['annotation-xml', 'audio', 'colgroup', 'desc', 'foreignobject', 'head', 'iframe', 'math', 'mi', 'mn', 'mo', 'ms', 'mtext', 'noembed', 'noframes', 'noscript', 'plaintext', 'script', 'style', 'svg', 'template', 'thead', 'title', 'video', 'xmp']);
/* Tags that are safe for data: URIs */
var DATA_URI_TAGS = null;
var DEFAULT_DATA_URI_TAGS = addToSet({}, ['audio', 'video', 'img', 'source', 'image', 'track']);
/* Attributes safe for values like "javascript:" */
var URI_SAFE_ATTRIBUTES = null;
var DEFAULT_URI_SAFE_ATTRIBUTES = addToSet({}, ['alt', 'class', 'for', 'id', 'label', 'name', 'pattern', 'placeholder', 'summary', 'title', 'value', 'style', 'xmlns']);
var MATHML_NAMESPACE = 'http://www.w3.org/1998/Math/MathML';
var SVG_NAMESPACE = 'http://www.w3.org/2000/svg';
var HTML_NAMESPACE = 'http://www.w3.org/1999/xhtml';
/* Document namespace */
var NAMESPACE = HTML_NAMESPACE;
var IS_EMPTY_INPUT = false;
/* Keep a reference to config to pass to hooks */
var CONFIG = null;
/* Ideally, do not touch anything below this line */
/* ______________________________________________ */
var formElement = document.createElement('form');
/**
* _parseConfig
*
* @param {Object} cfg optional config literal
*/
// eslint-disable-next-line complexity
var _parseConfig = function _parseConfig(cfg) {
if (CONFIG && CONFIG === cfg) {
return;
}
/* Shield configuration object from tampering */
if (!cfg || (typeof cfg === 'undefined' ? 'undefined' : _typeof(cfg)) !== 'object') {
cfg = {};
}
/* Shield configuration object from prototype pollution */
cfg = clone(cfg);
/* Set configuration parameters */
ALLOWED_TAGS = 'ALLOWED_TAGS' in cfg ? addToSet({}, cfg.ALLOWED_TAGS) : DEFAULT_ALLOWED_TAGS;
ALLOWED_ATTR = 'ALLOWED_ATTR' in cfg ? addToSet({}, cfg.ALLOWED_ATTR) : DEFAULT_ALLOWED_ATTR;
URI_SAFE_ATTRIBUTES = 'ADD_URI_SAFE_ATTR' in cfg ? addToSet(clone(DEFAULT_URI_SAFE_ATTRIBUTES), cfg.ADD_URI_SAFE_ATTR) : DEFAULT_URI_SAFE_ATTRIBUTES;
DATA_URI_TAGS = 'ADD_DATA_URI_TAGS' in cfg ? addToSet(clone(DEFAULT_DATA_URI_TAGS), cfg.ADD_DATA_URI_TAGS) : DEFAULT_DATA_URI_TAGS;
FORBID_TAGS = 'FORBID_TAGS' in cfg ? addToSet({}, cfg.FORBID_TAGS) : {};
FORBID_ATTR = 'FORBID_ATTR' in cfg ? addToSet({}, cfg.FORBID_ATTR) : {};
USE_PROFILES = 'USE_PROFILES' in cfg ? cfg.USE_PROFILES : false;
ALLOW_ARIA_ATTR = cfg.ALLOW_ARIA_ATTR !== false; // Default true
ALLOW_DATA_ATTR = cfg.ALLOW_DATA_ATTR !== false; // Default true
ALLOW_UNKNOWN_PROTOCOLS = cfg.ALLOW_UNKNOWN_PROTOCOLS || false; // Default false
SAFE_FOR_TEMPLATES = cfg.SAFE_FOR_TEMPLATES || false; // Default false
WHOLE_DOCUMENT = cfg.WHOLE_DOCUMENT || false; // Default false
RETURN_DOM = cfg.RETURN_DOM || false; // Default false
RETURN_DOM_FRAGMENT = cfg.RETURN_DOM_FRAGMENT || false; // Default false
RETURN_DOM_IMPORT = cfg.RETURN_DOM_IMPORT !== false; // Default true
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
KEEP_CONTENT = cfg.KEEP_CONTENT !== false; // Default true
IN_PLACE = cfg.IN_PLACE || false; // Default false
IS_ALLOWED_URI$$1 = cfg.ALLOWED_URI_REGEXP || IS_ALLOWED_URI$$1;
NAMESPACE = cfg.NAMESPACE || HTML_NAMESPACE;
if (SAFE_FOR_TEMPLATES) {
ALLOW_DATA_ATTR = false;
}
if (RETURN_DOM_FRAGMENT) {
RETURN_DOM = true;
}
/* Parse profile info */
if (USE_PROFILES) {
ALLOWED_TAGS = addToSet({}, [].concat(_toConsumableArray$1(text)));
ALLOWED_ATTR = [];
if (USE_PROFILES.html === true) {
addToSet(ALLOWED_TAGS, html);
addToSet(ALLOWED_ATTR, html$1);
}
if (USE_PROFILES.svg === true) {
addToSet(ALLOWED_TAGS, svg);
addToSet(ALLOWED_ATTR, svg$1);
addToSet(ALLOWED_ATTR, xml);
}
if (USE_PROFILES.svgFilters === true) {
addToSet(ALLOWED_TAGS, svgFilters);
addToSet(ALLOWED_ATTR, svg$1);
addToSet(ALLOWED_ATTR, xml);
}
if (USE_PROFILES.mathMl === true) {
addToSet(ALLOWED_TAGS, mathMl);
addToSet(ALLOWED_ATTR, mathMl$1);
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);
}
if (cfg.ADD_ATTR) {
if (ALLOWED_ATTR === DEFAULT_ALLOWED_ATTR) {
ALLOWED_ATTR = clone(ALLOWED_ATTR);
}
addToSet(ALLOWED_ATTR, cfg.ADD_ATTR);
}
if (cfg.ADD_URI_SAFE_ATTR) {
addToSet(URI_SAFE_ATTRIBUTES, cfg.ADD_URI_SAFE_ATTR);
}
/* Add #text in case KEEP_CONTENT is set to true */
if (KEEP_CONTENT) {
ALLOWED_TAGS['#text'] = true;
}
/* Add html, head and body to ALLOWED_TAGS in case WHOLE_DOCUMENT is true */
if (WHOLE_DOCUMENT) {
addToSet(ALLOWED_TAGS, ['html', 'head', 'body']);
}
/* Add tbody to ALLOWED_TAGS in case tables are permitted, see #286, #365 */
if (ALLOWED_TAGS.table) {
addToSet(ALLOWED_TAGS, ['tbody']);
delete FORBID_TAGS.tbody;
}
// Prevent further manipulation of configuration.
// Not available in IE8, Safari 5, etc.
if (freeze) {
freeze(cfg);
}
CONFIG = cfg;
};
var MATHML_TEXT_INTEGRATION_POINTS = addToSet({}, ['mi', 'mo', 'mn', 'ms', 'mtext']);
var HTML_INTEGRATION_POINTS = addToSet({}, ['foreignobject', 'desc', 'title', 'annotation-xml']);
/* Keep track of all possible SVG and MathML tags
* so that we can perform the namespace checks
* correctly. */
var ALL_SVG_TAGS = addToSet({}, svg);
addToSet(ALL_SVG_TAGS, svgFilters);
addToSet(ALL_SVG_TAGS, svgDisallowed);
var ALL_MATHML_TAGS = addToSet({}, mathMl);
addToSet(ALL_MATHML_TAGS, mathMlDisallowed);
/**
*
*
* @param {Element} element a DOM element whose namespace is being checked
* @returns {boolean} Return false if the element has a
* namespace that a spec-compliant parser would never
* return. Return true otherwise.
*/
var _checkValidNamespace = function _checkValidNamespace(element) {
var parent = getParentNode(element);
// In JSDOM, if we're inside shadow DOM, then parentNode
// can be null. We just simulate parent in this case.
if (!parent || !parent.tagName) {
parent = {
namespaceURI: HTML_NAMESPACE,
tagName: 'template'
};
}
var tagName = stringToLowerCase(element.tagName);
var parentTagName = stringToLowerCase(parent.tagName);
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;
}
// Certain elements are allowed in both SVG and HTML
// namespace. We need to specify them explicitly
// so that they don't get erronously deleted from
// HTML namespace.
var commonSvgAndHTMLElements = addToSet({}, ['title', 'style', 'font', 'a', 'script']);
// We disallow tags that are specific for MathML
// or SVG and should never appear in HTML namespace
return !ALL_MATHML_TAGS[tagName] && (commonSvgAndHTMLElements[tagName] || !ALL_SVG_TAGS[tagName]);
}
// The code should never reach this place (this means
// that the element somehow got namespace that is not
// HTML, SVG or MathML). Return false just in case.
return false;
};
/**
* _forceRemove
*
* @param {Node} node a DOM node
*/
var _forceRemove = function _forceRemove(node) {
arrayPush(DOMPurify.removed, { element: node });
try {
// eslint-disable-next-line unicorn/prefer-dom-node-remove
node.parentNode.removeChild(node);
} catch (_) {
try {
node.outerHTML = emptyHTML;
} catch (_) {
node.remove();
}
}
};
/**
* _removeAttribute
*
* @param {String} name an Attribute name
* @param {Node} node a DOM node
*/
var _removeAttribute = function _removeAttribute(name, node) {
try {
arrayPush(DOMPurify.removed, {
attribute: node.getAttributeNode(name),
from: node
});
} catch (_) {
arrayPush(DOMPurify.removed, {
attribute: null,
from: node
});
}
node.removeAttribute(name);
// We void attribute values for unremovable "is"" attributes
if (name === 'is' && !ALLOWED_ATTR[name]) {
if (RETURN_DOM || RETURN_DOM_FRAGMENT) {
try {
_forceRemove(node);
} catch (_) {}
} else {
try {
node.setAttribute(name, '');
} catch (_) {}
}
}
};
/**
* _initDocument
*
* @param {String} dirty a string of dirty markup
* @return {Document} a DOM, filled with the dirty markup
*/
var _initDocument = function _initDocument(dirty) {
/* Create a HTML document */
var doc = void 0;
var leadingWhitespace = void 0;
if (FORCE_BODY) {
dirty = '<remove></remove>' + dirty;
} else {
/* If FORCE_BODY isn't used, leading whitespace needs to be preserved manually */
var matches = stringMatch(dirty, /^[\r\n\t ]+/);
leadingWhitespace = matches && matches[0];
}
var dirtyPayload = trustedTypesPolicy ? trustedTypesPolicy.createHTML(dirty) : dirty;
/*
* Use the DOMParser API by default, fallback later if needs be
* DOMParser not work for svg when has multiple root element.
*/
if (NAMESPACE === HTML_NAMESPACE) {
try {
doc = new DOMParser().parseFromString(dirtyPayload, 'text/html');
} catch (_) {}
}
/* Use createHTMLDocument in case DOMParser is not available */
if (!doc || !doc.documentElement) {
doc = implementation.createDocument(NAMESPACE, 'template', null);
try {
doc.documentElement.innerHTML = IS_EMPTY_INPUT ? '' : dirtyPayload;
} catch (_) {
// Syntax error if dirtyPayload is invalid xml
}
}
var body = doc.body || doc.documentElement;
if (dirty && leadingWhitespace) {
body.insertBefore(document.createTextNode(leadingWhitespace), body.childNodes[0] || null);
}
/* Work on whole document or just its body */
if (NAMESPACE === HTML_NAMESPACE) {
return getElementsByTagName.call(doc, WHOLE_DOCUMENT ? 'html' : 'body')[0];
}
return WHOLE_DOCUMENT ? doc.documentElement : body;
};
/**
* _createIterator
*
* @param {Document} root document/fragment to create iterator for
* @return {Iterator} iterator instance
*/
var _createIterator = function _createIterator(root) {
return createNodeIterator.call(root.ownerDocument || root, root, NodeFilter.SHOW_ELEMENT | NodeFilter.SHOW_COMMENT | NodeFilter.SHOW_TEXT, null, false);
};
/**
* _isClobbered
*
* @param {Node} elm element to check for clobbering attacks
* @return {Boolean} true if clobbered, false if safe
*/
var _isClobbered = function _isClobbered(elm) {
if (elm instanceof Text || elm instanceof Comment) {
return false;
}
if (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') {
return true;
}
return false;
};
/**
* _isNode
*
* @param {Node} obj object to check whether it's a DOM node
* @return {Boolean} true is object is a DOM node
*/
var _isNode = function _isNode(object) {
return (typeof Node === 'undefined' ? 'undefined' : _typeof(Node)) === 'object' ? object instanceof Node : object && (typeof object === 'undefined' ? 'undefined' : _typeof(object)) === 'object' && typeof object.nodeType === 'number' && typeof object.nodeName === 'string';
};
/**
* _executeHook
* Execute user configurable hooks
*
* @param {String} entryPoint Name of the hook's entry point
* @param {Node} currentNode node to work on with the hook
* @param {Object} data additional hook parameters
*/
var _executeHook = function _executeHook(entryPoint, currentNode, data) {
if (!hooks[entryPoint]) {
return;
}
arrayForEach(hooks[entryPoint], function (hook) {
hook.call(DOMPurify, currentNode, data, CONFIG);
});
};
/**
* _sanitizeElements
*
* @protect nodeName
* @protect textContent
* @protect removeChild
*
* @param {Node} currentNode to check for permission to exist
* @return {Boolean} true if node was killed, false if left alive
*/
var _sanitizeElements = function _sanitizeElements(currentNode) {
var content = void 0;
/* Execute a hook if present */
_executeHook('beforeSanitizeElements', currentNode, null);
/* Check if element is clobbered or can clobber */
if (_isClobbered(currentNode)) {
_forceRemove(currentNode);
return true;
}
/* Check if tagname contains Unicode */
if (stringMatch(currentNode.nodeName, /[\u0080-\uFFFF]/)) {
_forceRemove(currentNode);
return true;
}
/* Now let's check the element's type and name */
var tagName = stringToLowerCase(currentNode.nodeName);
/* Execute a hook if present */
_executeHook('uponSanitizeElement', currentNode, {
tagName: tagName,
allowedTags: ALLOWED_TAGS
});
/* Detect mXSS attempts abusing namespace confusion */
if (!_isNode(currentNode.firstElementChild) && (!_isNode(currentNode.content) || !_isNode(currentNode.content.firstElementChild)) && regExpTest(/<[/\w]/g, currentNode.innerHTML) && regExpTest(/<[/\w]/g, currentNode.textContent)) {
_forceRemove(currentNode);
return true;
}
/* Remove element if anything forbids its presence */
if (!ALLOWED_TAGS[tagName] || FORBID_TAGS[tagName]) {
/* Keep content except for bad-listed elements */
if (KEEP_CONTENT && !FORBID_CONTENTS[tagName]) {
var parentNode = getParentNode(currentNode) || currentNode.parentNode;
var childNodes = getChildNodes(currentNode) || currentNode.childNodes;
if (childNodes && parentNode) {
var childCount = childNodes.length;
for (var i = childCount - 1; i >= 0; --i) {
parentNode.insertBefore(cloneNode(childNodes[i], true), getNextSibling(currentNode));
}
}
}
_forceRemove(currentNode);
return true;
}
/* Check whether element has a valid namespace */
if (currentNode instanceof Element && !_checkValidNamespace(currentNode)) {
_forceRemove(currentNode);
return true;
}
if ((tagName === 'noscript' || tagName === 'noembed') && regExpTest(/<\/no(script|embed)/i, currentNode.innerHTML)) {
_forceRemove(currentNode);
return true;
}
/* Sanitize element content to be template-safe */
if (SAFE_FOR_TEMPLATES && currentNode.nodeType === 3) {
/* Get the element's text content */
content = currentNode.textContent;
content = stringReplace(content, MUSTACHE_EXPR$$1, ' ');
content = stringReplace(content, ERB_EXPR$$1, ' ');
if (currentNode.textContent !== content) {
arrayPush(DOMPurify.removed, { element: currentNode.cloneNode() });
currentNode.textContent = content;
}
}
/* Execute a hook if present */
_executeHook('afterSanitizeElements', currentNode, null);
return false;
};
/**
* _isValidAttribute
*
* @param {string} lcTag Lowercase tag name of containing element.
* @param {string} lcName Lowercase attribute name.
* @param {string} value Attribute value.
* @return {Boolean} Returns true if `value` is valid, otherwise false.
*/
// eslint-disable-next-line complexity
var _isValidAttribute = function _isValidAttribute(lcTag, lcName, value) {
/* Make sure attribute cannot clobber */
if (SANITIZE_DOM && (lcName === 'id' || lcName === 'name') && (value in document || value in formElement)) {
return false;
}
/* Allow valid data-* attributes: At least one character after "-"
(https://html.spec.whatwg.org/multipage/dom.html#embedding-custom-non-visible-data-with-the-data-*-attributes)
XML-compatible (https://html.spec.whatwg.org/multipage/infrastructure.html#xml-compatible and http://www.w3.org/TR/xml/#d0e804)
We don't need to check the value; it's always URI safe. */
if (ALLOW_DATA_ATTR && !FORBID_ATTR[lcName] && regExpTest(DATA_ATTR$$1, lcName)) ; else if (ALLOW_ARIA_ATTR && regExpTest(ARIA_ATTR$$1, lcName)) ; else if (!ALLOWED_ATTR[lcName] || FORBID_ATTR[lcName]) {
return false;
/* Check value is safe. First, is attr inert? If so, is safe */
} else if (URI_SAFE_ATTRIBUTES[lcName]) ; else if (regExpTest(IS_ALLOWED_URI$$1, stringReplace(value, ATTR_WHITESPACE$$1, ''))) ; else if ((lcName === 'src' || lcName === 'xlink:href' || lcName === 'href') && lcTag !== 'script' && stringIndexOf(value, 'data:') === 0 && DATA_URI_TAGS[lcTag]) ; else if (ALLOW_UNKNOWN_PROTOCOLS && !regExpTest(IS_SCRIPT_OR_DATA$$1, stringReplace(value, ATTR_WHITESPACE$$1, ''))) ; else if (!value) ; else {
return false;
}
return true;
};
/**
* _sanitizeAttributes
*
* @protect attributes
* @protect nodeName
* @protect removeAttribute
* @protect setAttribute
*
* @param {Node} currentNode to sanitize
*/
var _sanitizeAttributes = function _sanitizeAttributes(currentNode) {
var attr = void 0;
var value = void 0;
var lcName = void 0;
var l = void 0;
/* Execute a hook if present */
_executeHook('beforeSanitizeAttributes', currentNode, null);
var attributes = currentNode.attributes;
/* Check if we have attributes; if not we might have a text node */
if (!attributes) {
return;
}
var hookEvent = {
attrName: '',
attrValue: '',
keepAttr: true,
allowedAttributes: ALLOWED_ATTR
};
l = attributes.length;
/* Go backwards over all attributes; safely remove bad ones */
while (l--) {
attr = attributes[l];
var _attr = attr,
name = _attr.name,
namespaceURI = _attr.namespaceURI;
value = stringTrim(attr.value);
lcName = stringToLowerCase(name);