https://www.amcp.org/modules/contrib/responsive_menu/js/responsive_menu.config.js?v=10.6.17

1(function () {
2
3  'use strict';
4
5  /**
6   * Provides the off-canvas menu.
7   *
8   * @type {Drupal~behavior}
9   *
10   * @prop {Drupal~behaviorAttach} attach
11   *   Attaches the behavior for the off-canvas menu.
12   */
13  Drupal.behaviors.responsive_menu_mmenu = {
14    attach: function (context) {
15
16      const mmenuId = '#off-canvas';
17      const offCanvas = document.querySelector(mmenuId)
18
19      // The instatiation of the mmenu must only happen once.
20      if (offCanvas && !offCanvas.hasOwnProperty('mmApi') && typeof (Mmenu) !== 'undefined') {
21        const settings = drupalSettings.responsive_menu;
22        const position = settings.position,
23          theme = settings.theme,
24          pagedim = settings.pagedim;
25
26        const options = {
27          extensions: [
28            theme,
29            'fx-menu-slide',
30            position === 'left' ? 'position-left' : 'position-right'
31          ],
32          keyboardNavigation: {
33            enable: true,
34            enhance: true,
35          },
36          drag: {
37            open: settings.drag
38          }
39        };
40
41        if (pagedim !== 'none') {
42          options.extensions.push(pagedim);
43        };
44
45        const config = {
46          classNames: {
47            selected: 'menu-item--active-trail'
48          }
49        };
50
51        if (settings.pageWrapper) {
52          config['offCanvas'] = {
53            selector: '.responsive-menu-page-wrapper',
54          }
55        };
56
57        // Allow the settings and options to be extended or overridden.
58        if (typeof settings.custom !== 'undefined') {
59          if (typeof settings.custom.options !== 'undefined') {
60            extend(options, drupalSettings.responsive_menu.custom.options);
61          }
62          if (typeof drupalSettings.responsive_menu.custom.config !== 'undefined') {
63            extend(config, drupalSettings.responsive_menu.custom.config);
64          }
65        }
66
67        // Set up the off canvas menu.
68        const mmenu = new Mmenu(mmenuId, options, config);
69
70        // Due to a rendering issue with Chrome the page needs the viewport
71        // metatag to have a value including initial-scale=1.0 otherwise it
72        // won't render properly.
73        // @see issue #3153145
74        const mmenuApi = mmenu.API;
75        const viewports = document.getElementsByName('viewport');
76
77        if (viewports.length !== 0 && settings.modifyViewport) {
78          const viewportMeta = viewports[0]
79          const defaultViewport = viewports[0].content
80          const staticViewport = "width=device-width, initial-scale=1.0, minimum-scale=1.0";
81
82          mmenuApi.bind('open:start', function() {
83            viewportMeta.setAttribute('content', staticViewport);
84          });
85          mmenuApi.bind('close:start', function() {
86            viewportMeta.setAttribute('content', defaultViewport);
87          });
88        }
89      }
90    }
91  };
92})();
93
94/**
95 * Similar to the jQuery extend but shallow.
96 *
97 * @param out
98 * @returns {*|{}}
99 */
100const extend = function (out) {
101  out = out || {};
102
103  for (let i = 1; i < arguments.length; i++) {
104    if (!arguments[i])
105      continue;
106
107    for (let key in arguments[i]) {
108      if (arguments[i].hasOwnProperty(key))
109        out[key] = arguments[i][key];
110    }
111  }
112
113  return out;
114};