Acme.BookStore.HttpApi.Host/node_modules/bootstrap/js/src/util/sanitizer.js

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/**
 * --------------------------------------------------------------------------
 * Bootstrap (v5.1.3): 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.
 *
 * Shoutout 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.
 *
 * Shoutout 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
  }

  const regExp = allowedAttributeList.filter(attributeRegex => attributeRegex instanceof RegExp)

  // Check if a regular expression validates the attribute.
  for (let i = 0, len = regExp.length; i < len; i++) {
    if (regExp[i].test(attributeName)) {
      return true
    }
  }

  return false
}

export const DefaultAllowlist = {
  // Global attributes allowed on any supplied element below.
  '*': ['class', 'dir', 'id', 'lang', 'role', ARIA_ATTRIBUTE_PATTERN],