/**
 * @license
 * Copyright 2019-2020 The Go Authors. All rights reserved.
 * Use of this source code is governed by a BSD-style
 * license that can be found in the LICENSE file.
 */

/**
 * A bit of navigation related code for handling dismissible elements.
 */
(function registerHeaderListeners() {
  'use strict';

  const header = document.querySelector('.js-header');
  const menuButtons = document.querySelectorAll('.js-headerMenuButton');
  menuButtons.forEach(button => {
    button.addEventListener('click', e => {
      e.preventDefault();
      header.classList.toggle('is-active');
      button.setAttribute('aria-expanded', header.classList.contains('is-active'));
    });
  });

  const scrim = document.querySelector('.js-scrim');
  if (scrim && scrim.hasOwnProperty('addEventListener')) {
    scrim.addEventListener('click', e => {
      e.preventDefault();
      header.classList.remove('is-active');
      menuButtons.forEach(button => {
        button.setAttribute('aria-expanded', header.classList.contains('is-active'));
      });
    });
  }
})();