Method getAttrValueOrNull_

validator/js/engine/htmlparser-interface.js:331–333

* Returns the value of a given attribute name. If it does not exist then * returns null. * @param {string} name * @return {?string} * @private

(name)

   * @private
   */
  getAttrValueOrNull_(name) {
    return this.attrsByKey()[name] || null;
  }
  /**
   * Returns the extension name.
   * @return {string}