/*!
* Bootstrap sanitizer.js v5.3.0-alpha1 (https://getbootstrap.com/)
* Copyright 2011-2022 The Bootstrap Authors (https://github.com/twbs/bootstrap/graphs/contributors)
* Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
*/
(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
typeof define === 'function' && define.amd ? define(['exports'], factory) :
(global = typeof globalThis !== 'undefined' ? globalThis : global || self, factory(global.Sanitizer = {}));
})(this, (function (exports) { 'use strict';
/**
* --------------------------------------------------------------------------
* Bootstrap (v5.3.0-alpha1): util/sanitizer.js
* Licensed under MIT (https://github.com/twbs/bootstrap/blob/main/LICENSE)
* --------------------------------------------------------------------------
*/
const uriAttributes = new Set(['background', 'cite', 'href', 'itemtype', 'longdesc', 'poster', 'src', 'xlink:href']);
const ARIA_ATTRIBUTE_PATTERN = /^aria-[\w-]*$/i;
/**
* A pattern that recognizes a commonly useful subset of URLs that are safe.
*
* Shout-out to Angular https://github.com/angular/angular/blob/12.2.x/packages/core/src/sanitization/url_sanitizer.ts
*/
const SAFE_URL_PATTERN = /^(?:(?:https?|mailto|ftp|tel|file|sms):|[^#&/:?]*(?:[#/?]|$))/i;
/**
* A pattern that matches safe data URLs. Only matches image, video and audio types.
*
* Shout-out to Angular https://github.com/angular/angular/blob/12.2.x/packages/core/src/sanitization/url_sanitizer.ts
*/
const DATA_URL_PATTERN = /^data:(?:image\/(?:bmp|gif|jpeg|jpg|png|tiff|webp)|video\/(?:mpeg|mp4|ogg|webm)|audio\/(?:mp3|oga|ogg|opus));base64,[\d+/a-z]+=*$/i;
const allowedAttribute = (attribute, allowedAttributeList) => {
const attributeName = attribute.nodeName.toLowerCase();
if (allowedAttributeList.includes(attributeName)) {
if (uriAttributes.has(attributeName)) {
return Boolean(SAFE_URL_PATTERN.test(attribute.nodeValue) || DATA_URL_PATTERN.test(attribute.nodeValue));
}
return true;
}
// Check if a regular expression validates the attribute.
return allowedAttributeList.filter(attributeRegex => attributeRegex instanceof RegExp).some(regex => regex.test(attributeName));
};
const DefaultAllowlist = {
// Global attributes allowed on any supplied element below.
'*': ['class', 'dir', 'id', 'lang', 'role', ARIA_ATTRIBUTE_PATTERN],
a: ['target', 'href', 'title', 'rel'],
area: [],
b: [],
br: [],
col: [],
code: [],
div: [],
em: [],
hr: [],
h1: [],
h2: [],
h3: [],
h4: [],
h5: [],
h6: [],
i: [],
img: ['src', 'srcset', 'alt', 'title', 'width', 'height'],
li: [],
ol: [],
p: [],
pre: [],
s: [],
small: [],
span: [],
sub: [],
sup: [],
strong: [],
u: [],
ul: []
};
function sanitizeHtml(unsafeHtml, allowList, sanitizeFunction) {
if (!unsafeHtml.length) {
return unsafeHtml;
}
if (sanitizeFunction && typeof sanitizeFunction === 'function') {
return sanitizeFunction(unsafeHtml);
}
const domParser = new window.DOMParser();
const createdDocument = domParser.parseFromString(unsafeHtml, 'text/html');
const elements = [].concat(...createdDocument.body.querySelectorAll('*'));
for (const element of elements) {
const elementName = element.nodeName.toLowerCase();
if (!Object.keys(allowList).includes(elementName)) {
element.remove();
continue;
}
const attributeList = [].concat(...element.attributes);
const allowedAttributes = [].concat(allowList['*'] || [], allowList[elementName] || []);
for (const attribute of attributeList) {
if (!allowedAttribute(attribute, allowedAttributes)) {
element.removeAttribute(attribute.nodeName);
}
}
}
return createdDocument.body.innerHTML;
}
exports.DefaultAllowlist = DefaultAllowlist;
exports.sanitizeHtml = sanitizeHtml;
Object.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });
}));
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