https://jkscrossstitchsupplies.com.au/wp-content/themes/shopstar/library/js/navigation.js?ver=20120206

1/**
2 * navigation.js
3 *
4 * Handles toggling the navigation menu for small screens and enables tab
5 * support for dropdown menus.
6 */
7( function() {
8	var container, button, menu, links, subMenus;
9
10	container = document.getElementById( 'site-navigation' );
11	if ( ! container ) {
12		return;
13	}
14
15	button = container.getElementsByTagName( 'button' )[0];
16	if ( 'undefined' === typeof button ) {
17		return;
18	}
19
20	menu = container.getElementsByTagName( 'ul' )[0];
21
22	// Hide menu toggle button if menu is empty and return early.
23	if ( 'undefined' === typeof menu ) {
24		button.style.display = 'none';
25		return;
26	}
27
28	menu.setAttribute( 'aria-expanded', 'false' );
29	
30	if ( -1 === menu.className.indexOf( 'nav-menu' ) ) {
31		menu.className += ' nav-menu';
32	}
33
34	button.onclick = function() {
35		if ( -1 !== container.className.indexOf( 'toggled' ) ) {
36			container.className = container.className.replace( ' toggled', '' );
37			button.setAttribute( 'aria-expanded', 'false' );
38			menu.setAttribute( 'aria-expanded', 'false' );
39		} else {
40			container.className += ' toggled';
41			button.setAttribute( 'aria-expanded', 'true' );
42			menu.setAttribute( 'aria-expanded', 'true' );
43		}
44	};
45
46} )();