Function _isBasicCustomElement

src/purify.ts:1257–1259

(tagName: string)

   * @returns Returns true if the tag name meets the basic criteria for a custom element, otherwise false.
   */
  const _isBasicCustomElement = function (tagName: string): RegExpMatchArray {
    return tagName !== 'annotation-xml' && stringMatch(tagName, CUSTOM_ELEMENT);
  };

  /**
   * _sanitizeAttributes