{"version":3,"file":"purify.min.js","sources":["../src/utils.js","../src/purify.js","../src/tags.js","../src/attrs.js","../src/regexp.js"],"sourcesContent":["const { hasOwnProperty, setPrototypeOf, isFrozen, keys: objectKeys } = Object;\n\nlet { freeze, seal } = Object; // eslint-disable-line import/no-mutable-exports\nlet { apply, construct } = typeof Reflect !== 'undefined' && Reflect;\n\nif (!apply) {\n apply = function(fun, thisValue, args) {\n return fun.apply(thisValue, args);\n };\n}\n\nif (!freeze) {\n freeze = function(x) {\n return x;\n };\n}\n\nif (!seal) {\n seal = function(x) {\n return x;\n };\n}\n\nif (!construct) {\n construct = function(Func, args) {\n return new Func(...args);\n };\n}\n\nconst arrayForEach = unapply(Array.prototype.forEach);\nconst arrayIndexOf = unapply(Array.prototype.indexOf);\nconst arrayJoin = unapply(Array.prototype.join);\nconst arrayPop = unapply(Array.prototype.pop);\nconst arrayPush = unapply(Array.prototype.push);\nconst arraySlice = unapply(Array.prototype.slice);\n\nconst stringToLowerCase = unapply(String.prototype.toLowerCase);\nconst stringMatch = unapply(String.prototype.match);\nconst stringReplace = unapply(String.prototype.replace);\nconst stringIndexOf = unapply(String.prototype.indexOf);\nconst stringTrim = unapply(String.prototype.trim);\n\nconst regExpTest = unapply(RegExp.prototype.test);\nconst regExpCreate = unconstruct(RegExp);\n\nconst typeErrorCreate = unconstruct(TypeError);\n\nexport function unapply(func) {\n return (thisArg, ...args) => apply(func, thisArg, args);\n}\n\nexport function unconstruct(func) {\n return (...args) => construct(func, args);\n}\n\n/* Add properties to a lookup table */\nexport function addToSet(set, array) {\n if (setPrototypeOf) {\n // Make 'in' and truthy checks like Boolean(set.constructor)\n // independent of any properties defined on Object.prototype.\n // Prevent prototype setters from intercepting set as a this value.\n setPrototypeOf(set, null);\n }\n\n let l = array.length;\n while (l--) {\n let element = array[l];\n if (typeof element === 'string') {\n const lcElement = stringToLowerCase(element);\n if (lcElement !== element) {\n // Config presets (e.g. tags.js, attrs.js) are immutable.\n if (!isFrozen(array)) {\n array[l] = lcElement;\n }\n\n element = lcElement;\n }\n }\n\n set[element] = true;\n }\n\n return set;\n}\n\n/* Shallow clone an object */\nexport function clone(object) {\n const newObject = {};\n\n let property;\n for (property in object) {\n if (apply(hasOwnProperty, object, [property])) {\n newObject[property] = object[property];\n }\n }\n\n return newObject;\n}\n\nexport {\n // Array\n arrayForEach,\n arrayIndexOf,\n arrayJoin,\n arrayPop,\n arrayPush,\n arraySlice,\n // Object\n freeze,\n hasOwnProperty,\n isFrozen,\n objectKeys,\n setPrototypeOf,\n seal,\n // RegExp\n regExpCreate,\n regExpTest,\n // String\n stringIndexOf,\n stringMatch,\n stringReplace,\n stringToLowerCase,\n stringTrim,\n // Errors\n typeErrorCreate,\n};\n","import * as TAGS from './tags';\nimport * as ATTRS from './attrs';\nimport * as EXPRESSIONS from './regexp';\nimport {\n addToSet,\n clone,\n freeze,\n objectKeys,\n arrayForEach,\n arrayIndexOf,\n arrayJoin,\n arrayPop,\n arrayPush,\n arraySlice,\n stringMatch,\n stringReplace,\n stringToLowerCase,\n stringIndexOf,\n stringTrim,\n regExpTest,\n regExpCreate,\n typeErrorCreate,\n} from './utils';\n\nconst getGlobal = () => (typeof window === 'undefined' ? null : window);\n\n/**\n * Creates a no-op policy for internal use only.\n * Don't export this function outside this module!\n * @param {?TrustedTypePolicyFactory} trustedTypes The policy factory.\n * @param {Document} document The document object (to determine policy name suffix)\n * @return {?TrustedTypePolicy} The policy created (or null, if Trusted Types\n * are not supported).\n */\nconst _createTrustedTypesPolicy = function(trustedTypes, document) {\n if (\n typeof trustedTypes !== 'object' ||\n typeof trustedTypes.createPolicy !== 'function'\n ) {\n return null;\n }\n\n // Allow the callers to control the unique policy name\n // by adding a data-tt-policy-suffix to the script element with the DOMPurify.\n // Policy creation with duplicate names throws in Trusted Types.\n let suffix = null;\n const ATTR_NAME = 'data-tt-policy-suffix';\n if (\n document.currentScript &&\n document.currentScript.hasAttribute(ATTR_NAME)\n ) {\n suffix = document.currentScript.getAttribute(ATTR_NAME);\n }\n\n const policyName = 'dompurify' + (suffix ? '#' + suffix : '');\n\n try {\n return trustedTypes.createPolicy(policyName, {\n createHTML(html) {\n return html;\n },\n });\n } catch (error) {\n // Policy creation failed (most likely another DOMPurify script has\n // already run). Skip creating the policy, as this will only cause errors\n // if TT are enforced.\n console.warn(\n 'TrustedTypes policy ' + policyName + ' could not be created.'\n );\n return null;\n }\n};\n\nfunction createDOMPurify(window = getGlobal()) {\n const DOMPurify = root => createDOMPurify(root);\n\n /**\n * Version label, exposed for easier checks\n * if DOMPurify is up to date or not\n */\n DOMPurify.version = VERSION;\n\n /**\n * Array of elements that DOMPurify removed during sanitation.\n * Empty if nothing was removed.\n */\n DOMPurify.removed = [];\n\n if (!window || !window.document || window.document.nodeType !== 9) {\n // Not running in a browser, provide a factory function\n // so that you can pass your own Window\n DOMPurify.isSupported = false;\n\n return DOMPurify;\n }\n\n const originalDocument = window.document;\n let useDOMParser = false;\n let removeTitle = false;\n\n let { document } = window;\n const {\n DocumentFragment,\n HTMLTemplateElement,\n Node,\n NodeFilter,\n NamedNodeMap = window.NamedNodeMap || window.MozNamedAttrMap,\n Text,\n Comment,\n DOMParser,\n trustedTypes,\n } = window;\n\n // As per issue #47, the web-components registry is inherited by a\n // new document created via createHTMLDocument. As per the spec\n // (http://w3c.github.io/webcomponents/spec/custom/#creating-and-passing-registries)\n // a new empty registry is used when creating a template contents owner\n // document, so we use that as our parent document to ensure nothing\n // is inherited.\n if (typeof HTMLTemplateElement === 'function') {\n const template = document.createElement('template');\n if (template.content && template.content.ownerDocument) {\n document = template.content.ownerDocument;\n }\n }\n\n const trustedTypesPolicy = _createTrustedTypesPolicy(\n trustedTypes,\n originalDocument\n );\n const emptyHTML = trustedTypesPolicy ? trustedTypesPolicy.createHTML('') : '';\n\n const {\n implementation,\n createNodeIterator,\n getElementsByTagName,\n createDocumentFragment,\n } = document;\n const { importNode } = originalDocument;\n\n let hooks = {};\n\n /**\n * Expose whether this browser supports running the full DOMPurify.\n */\n DOMPurify.isSupported =\n implementation &&\n typeof implementation.createHTMLDocument !== 'undefined' &&\n document.documentMode !== 9;\n\n const {\n MUSTACHE_EXPR,\n ERB_EXPR,\n DATA_ATTR,\n ARIA_ATTR,\n IS_SCRIPT_OR_DATA,\n ATTR_WHITESPACE,\n } = EXPRESSIONS;\n\n let { IS_ALLOWED_URI } = EXPRESSIONS;\n\n /**\n * We consider the elements and attributes below to be safe. Ideally\n * don't add any new ones but feel free to remove unwanted ones.\n */\n\n /* allowed element names */\n let ALLOWED_TAGS = null;\n const DEFAULT_ALLOWED_TAGS = addToSet({}, [\n ...TAGS.html,\n ...TAGS.svg,\n ...TAGS.svgFilters,\n ...TAGS.mathMl,\n ...TAGS.text,\n ]);\n\n /* Allowed attribute names */\n let ALLOWED_ATTR = null;\n const DEFAULT_ALLOWED_ATTR = addToSet({}, [\n ...ATTRS.html,\n ...ATTRS.svg,\n ...ATTRS.mathMl,\n ...ATTRS.xml,\n ]);\n\n /* Explicitly forbidden tags (overrides ALLOWED_TAGS/ADD_TAGS) */\n let FORBID_TAGS = null;\n\n /* Explicitly forbidden attributes (overrides ALLOWED_ATTR/ADD_ATTR) */\n let FORBID_ATTR = null;\n\n /* Decide if ARIA attributes are okay */\n let ALLOW_ARIA_ATTR = true;\n\n /* Decide if custom data attributes are okay */\n let ALLOW_DATA_ATTR = true;\n\n /* Decide if unknown protocols are okay */\n let ALLOW_UNKNOWN_PROTOCOLS = false;\n\n /* Output should be safe for jQuery's $() factory? */\n let SAFE_FOR_JQUERY = false;\n\n /* Output should be safe for common template engines.\n * This means, DOMPurify removes data attributes, mustaches and ERB\n */\n let SAFE_FOR_TEMPLATES = false;\n\n /* Decide if document with ... should be returned */\n let WHOLE_DOCUMENT = false;\n\n /* Track whether config is already set on this instance of DOMPurify. */\n let SET_CONFIG = false;\n\n /* Decide if all elements (e.g. style, script) must be children of\n * document.body. By default, browsers might move them to document.head */\n let FORCE_BODY = false;\n\n /* Decide if a DOM `HTMLBodyElement` should be returned, instead of a html\n * string (or a TrustedHTML object if Trusted Types are supported).\n * If `WHOLE_DOCUMENT` is enabled a `HTMLHtmlElement` will be returned instead\n */\n let RETURN_DOM = false;\n\n /* Decide if a DOM `DocumentFragment` should be returned, instead of a html\n * string (or a TrustedHTML object if Trusted Types are supported) */\n let RETURN_DOM_FRAGMENT = false;\n\n /* If `RETURN_DOM` or `RETURN_DOM_FRAGMENT` is enabled, decide if the returned DOM\n * `Node` is imported into the current `Document`. If this flag is not enabled the\n * `Node` will belong (its ownerDocument) to a fresh `HTMLDocument`, created by\n * DOMPurify. */\n let RETURN_DOM_IMPORT = false;\n\n /* Try to return a Trusted Type object instead of a string, retrun a string in\n * case Trusted Types are not supported */\n let RETURN_TRUSTED_TYPE = false;\n\n /* Output should be free from DOM clobbering attacks? */\n let SANITIZE_DOM = true;\n\n /* Keep element content when removing element? */\n let KEEP_CONTENT = true;\n\n /* If a `Node` is passed to sanitize(), then performs sanitization in-place instead\n * of importing it into a new Document and returning a sanitized copy */\n let IN_PLACE = false;\n\n /* Allow usage of profiles like html, svg and mathMl */\n let USE_PROFILES = {};\n\n /* Tags to ignore content of when KEEP_CONTENT is true */\n const FORBID_CONTENTS = addToSet({}, [\n 'annotation-xml',\n 'audio',\n 'colgroup',\n 'desc',\n 'foreignobject',\n 'head',\n 'iframe',\n 'math',\n 'mi',\n 'mn',\n 'mo',\n 'ms',\n 'mtext',\n 'noembed',\n 'noframes',\n 'plaintext',\n 'script',\n 'style',\n 'svg',\n 'template',\n 'thead',\n 'title',\n 'video',\n 'xmp',\n ]);\n\n /* Tags that are safe for data: URIs */\n const DATA_URI_TAGS = addToSet({}, [\n 'audio',\n 'video',\n 'img',\n 'source',\n 'image',\n ]);\n\n /* Attributes safe for values like \"javascript:\" */\n let URI_SAFE_ATTRIBUTES = null;\n const DEFAULT_URI_SAFE_ATTRIBUTES = addToSet({}, [\n 'alt',\n 'class',\n 'for',\n 'id',\n 'label',\n 'name',\n 'pattern',\n 'placeholder',\n 'summary',\n 'title',\n 'value',\n 'style',\n 'xmlns',\n ]);\n\n /* Keep a reference to config to pass to hooks */\n let CONFIG = null;\n\n /* Ideally, do not touch anything below this line */\n /* ______________________________________________ */\n\n const formElement = document.createElement('form');\n\n /**\n * _parseConfig\n *\n * @param {Object} cfg optional config literal\n */\n // eslint-disable-next-line complexity\n const _parseConfig = function(cfg) {\n if (CONFIG && CONFIG === cfg) {\n return;\n }\n\n /* Shield configuration object from tampering */\n if (!cfg || typeof cfg !== 'object') {\n cfg = {};\n }\n\n /* Set configuration parameters */\n ALLOWED_TAGS =\n 'ALLOWED_TAGS' in cfg\n ? addToSet({}, cfg.ALLOWED_TAGS)\n : DEFAULT_ALLOWED_TAGS;\n ALLOWED_ATTR =\n 'ALLOWED_ATTR' in cfg\n ? addToSet({}, cfg.ALLOWED_ATTR)\n : DEFAULT_ALLOWED_ATTR;\n URI_SAFE_ATTRIBUTES =\n 'ADD_URI_SAFE_ATTR' in cfg\n ? addToSet(clone(DEFAULT_URI_SAFE_ATTRIBUTES), cfg.ADD_URI_SAFE_ATTR)\n : DEFAULT_URI_SAFE_ATTRIBUTES;\n FORBID_TAGS = 'FORBID_TAGS' in cfg ? addToSet({}, cfg.FORBID_TAGS) : {};\n FORBID_ATTR = 'FORBID_ATTR' in cfg ? addToSet({}, cfg.FORBID_ATTR) : {};\n USE_PROFILES = 'USE_PROFILES' in cfg ? cfg.USE_PROFILES : false;\n ALLOW_ARIA_ATTR = cfg.ALLOW_ARIA_ATTR !== false; // Default true\n ALLOW_DATA_ATTR = cfg.ALLOW_DATA_ATTR !== false; // Default true\n ALLOW_UNKNOWN_PROTOCOLS = cfg.ALLOW_UNKNOWN_PROTOCOLS || false; // Default false\n SAFE_FOR_JQUERY = cfg.SAFE_FOR_JQUERY || false; // Default false\n SAFE_FOR_TEMPLATES = cfg.SAFE_FOR_TEMPLATES || false; // Default false\n WHOLE_DOCUMENT = cfg.WHOLE_DOCUMENT || false; // Default false\n RETURN_DOM = cfg.RETURN_DOM || false; // Default false\n RETURN_DOM_FRAGMENT = cfg.RETURN_DOM_FRAGMENT || false; // Default false\n RETURN_DOM_IMPORT = cfg.RETURN_DOM_IMPORT || false; // Default false\n RETURN_TRUSTED_TYPE = cfg.RETURN_TRUSTED_TYPE || false; // Default false\n FORCE_BODY = cfg.FORCE_BODY || false; // Default false\n SANITIZE_DOM = cfg.SANITIZE_DOM !== false; // Default true\n KEEP_CONTENT = cfg.KEEP_CONTENT !== false; // Default true\n IN_PLACE = cfg.IN_PLACE || false; // Default false\n IS_ALLOWED_URI = cfg.ALLOWED_URI_REGEXP || IS_ALLOWED_URI;\n if (SAFE_FOR_TEMPLATES) {\n ALLOW_DATA_ATTR = false;\n }\n\n if (RETURN_DOM_FRAGMENT) {\n RETURN_DOM = true;\n }\n\n /* Parse profile info */\n if (USE_PROFILES) {\n ALLOWED_TAGS = addToSet({}, [...TAGS.text]);\n ALLOWED_ATTR = [];\n if (USE_PROFILES.html === true) {\n addToSet(ALLOWED_TAGS, TAGS.html);\n addToSet(ALLOWED_ATTR, ATTRS.html);\n }\n\n if (USE_PROFILES.svg === true) {\n addToSet(ALLOWED_TAGS, TAGS.svg);\n addToSet(ALLOWED_ATTR, ATTRS.svg);\n addToSet(ALLOWED_ATTR, ATTRS.xml);\n }\n\n if (USE_PROFILES.svgFilters === true) {\n addToSet(ALLOWED_TAGS, TAGS.svgFilters);\n addToSet(ALLOWED_ATTR, ATTRS.svg);\n addToSet(ALLOWED_ATTR, ATTRS.xml);\n }\n\n if (USE_PROFILES.mathMl === true) {\n addToSet(ALLOWED_TAGS, TAGS.mathMl);\n addToSet(ALLOWED_ATTR, ATTRS.mathMl);\n addToSet(ALLOWED_ATTR, ATTRS.xml);\n }\n }\n\n /* Merge configuration parameters */\n if (cfg.ADD_TAGS) {\n if (ALLOWED_TAGS === DEFAULT_ALLOWED_TAGS) {\n ALLOWED_TAGS = clone(ALLOWED_TAGS);\n }\n\n addToSet(ALLOWED_TAGS, cfg.ADD_TAGS);\n }\n\n if (cfg.ADD_ATTR) {\n if (ALLOWED_ATTR === DEFAULT_ALLOWED_ATTR) {\n ALLOWED_ATTR = clone(ALLOWED_ATTR);\n }\n\n addToSet(ALLOWED_ATTR, cfg.ADD_ATTR);\n }\n\n if (cfg.ADD_URI_SAFE_ATTR) {\n addToSet(URI_SAFE_ATTRIBUTES, cfg.ADD_URI_SAFE_ATTR);\n }\n\n /* Add #text in case KEEP_CONTENT is set to true */\n if (KEEP_CONTENT) {\n ALLOWED_TAGS['#text'] = true;\n }\n\n /* Add html, head and body to ALLOWED_TAGS in case WHOLE_DOCUMENT is true */\n if (WHOLE_DOCUMENT) {\n addToSet(ALLOWED_TAGS, ['html', 'head', 'body']);\n }\n\n /* Add tbody to ALLOWED_TAGS in case tables are permitted, see #286, #365 */\n if (ALLOWED_TAGS.table) {\n addToSet(ALLOWED_TAGS, ['tbody']);\n delete FORBID_TAGS.tbody;\n }\n\n // Prevent further manipulation of configuration.\n // Not available in IE8, Safari 5, etc.\n if (freeze) {\n freeze(cfg);\n }\n\n CONFIG = cfg;\n };\n\n /**\n * _forceRemove\n *\n * @param {Node} node a DOM node\n */\n const _forceRemove = function(node) {\n arrayPush(DOMPurify.removed, { element: node });\n try {\n node.parentNode.removeChild(node);\n } catch (error) {\n node.outerHTML = emptyHTML;\n }\n };\n\n /**\n * _removeAttribute\n *\n * @param {String} name an Attribute name\n * @param {Node} node a DOM node\n */\n const _removeAttribute = function(name, node) {\n try {\n arrayPush(DOMPurify.removed, {\n attribute: node.getAttributeNode(name),\n from: node,\n });\n } catch (error) {\n arrayPush(DOMPurify.removed, {\n attribute: null,\n from: node,\n });\n }\n\n node.removeAttribute(name);\n };\n\n /**\n * _initDocument\n *\n * @param {String} dirty a string of dirty markup\n * @return {Document} a DOM, filled with the dirty markup\n */\n const _initDocument = function(dirty) {\n /* Create a HTML document */\n let doc;\n let leadingWhitespace;\n\n if (FORCE_BODY) {\n dirty = '' + dirty;\n } else {\n /* If FORCE_BODY isn't used, leading whitespace needs to be preserved manually */\n const matches = stringMatch(dirty, /^[\\s]+/);\n leadingWhitespace = matches && matches[0];\n }\n\n const dirtyPayload = trustedTypesPolicy\n ? trustedTypesPolicy.createHTML(dirty)\n : dirty;\n /* Use DOMParser to workaround Firefox bug (see comment below) */\n if (useDOMParser) {\n try {\n doc = new DOMParser().parseFromString(dirtyPayload, 'text/html');\n } catch (error) {}\n }\n\n /* Remove title to fix a mXSS bug in older MS Edge */\n if (removeTitle) {\n addToSet(FORBID_TAGS, ['title']);\n }\n\n /* Otherwise use createHTMLDocument, because DOMParser is unsafe in\n Safari (see comment below) */\n if (!doc || !doc.documentElement) {\n doc = implementation.createHTMLDocument('');\n const { body } = doc;\n body.parentNode.removeChild(body.parentNode.firstElementChild);\n body.outerHTML = dirtyPayload;\n }\n\n if (dirty && leadingWhitespace) {\n doc.body.insertBefore(\n document.createTextNode(leadingWhitespace),\n doc.body.childNodes[0] || null\n );\n }\n\n /* Work on whole document or just its body */\n return getElementsByTagName.call(doc, WHOLE_DOCUMENT ? 'html' : 'body')[0];\n };\n\n // Firefox uses a different parser for innerHTML rather than\n // DOMParser (see https://bugzilla.mozilla.org/show_bug.cgi?id=1205631)\n // which means that you *must* use DOMParser, otherwise the output may\n // not be safe if used in a document.write context later.\n //\n // So we feature detect the Firefox bug and use the DOMParser if necessary.\n //\n // Chrome 77 and other versions ship an mXSS bug that caused a bypass to\n // happen. We now check for the mXSS trigger and react accordingly.\n if (DOMPurify.isSupported) {\n (function() {\n try {\n const doc = _initDocument(\n '