https://theobservantmom.com/wp-content/themes/argent/js/navigation.js?ver=20120206

1/**
2 * navigation.js
3 *
4 * Handles toggling the navigation menu for small screens.
5 */
6( function() {
7	var container, button, menu;
8
9	container = document.getElementById( 'site-navigation' );
10	if ( ! container ) {
11		return;
12	}
13
14	button = container.getElementsByTagName( 'button' )[0];
15	if ( 'undefined' === typeof button ) {
16		return;
17	}
18
19	menu = container.getElementsByTagName( 'ul' )[0];
20
21	// Hide menu toggle button if menu is empty and return early.
22	if ( 'undefined' === typeof menu ) {
23		button.style.display = 'none';
24		return;
25	}
26
27	menu.setAttribute( 'aria-expanded', 'false' );
28
29	if ( -1 === menu.className.indexOf( 'nav-menu' ) ) {
30		menu.className += ' nav-menu';
31	}
32
33	button.onclick = function() {
34		if ( -1 !== container.className.indexOf( 'toggled' ) ) {
35			container.className = container.className.replace( ' toggled', '' );
36			button.setAttribute( 'aria-expanded', 'false' );
37			menu.setAttribute( 'aria-expanded', 'false' );
38		} else {
39			container.className += ' toggled';
40			button.setAttribute( 'aria-expanded', 'true' );
41			menu.setAttribute( 'aria-expanded', 'true' );
42		}
43	};
44
45	// Fix child menus for touch devices.
46	function fixMenuTouchTaps( container ) {
47		var touchStartFn,
48			parentLink = container.querySelectorAll( '.menu-item-has-children > a, .page_item_has_children > a' );
49
50		if ( 'ontouchstart' in window ) {
51			touchStartFn = function( e ) {
52				var menuItem = this.parentNode;
53
54				if ( ! menuItem.classList.contains( 'focus' ) ) {
55					e.preventDefault();
56					for( var i = 0; i < menuItem.parentNode.children.length; ++i ) {
57						if ( menuItem === menuItem.parentNode.children[i] ) {
58							continue;
59						}
60						menuItem.parentNode.children[i].classList.remove( 'focus' );
61					}
62					menuItem.classList.add( 'focus' );
63				} else {
64					menuItem.classList.remove( 'focus' );
65				}
66			};
67
68			for ( var i = 0; i < parentLink.length; ++i ) {
69				parentLink[i].addEventListener( 'touchstart', touchStartFn, false )
70			}
71		}
72	}
73
74	fixMenuTouchTaps( container );
75} )();