https://www.stormeducational.co.uk/wp-content/themes/twentythirteen/js/functions.js?ver=2013-07-18

1/**
2 * Functionality specific to Twenty Thirteen.
3 *
4 * Provides helper functions to enhance the theme experience.
5 */
6
7( function( $ ) {
8	var body    = $( 'body' ),
9	    _window = $( window );
10
11	/**
12	 * Adds a top margin to the footer if the sidebar widget area is higher
13	 * than the rest of the page, to help the footer always visually clear
14	 * the sidebar.
15	 */
16	$( function() {
17		if ( body.is( '.sidebar' ) ) {
18			var sidebar   = $( '#secondary .widget-area' ),
19			    secondary = ( 0 == sidebar.length ) ? -40 : sidebar.height(),
20			    margin    = $( '#tertiary .widget-area' ).height() - $( '#content' ).height() - secondary;
21
22			if ( margin > 0 && _window.innerWidth() > 999 )
23				$( '#colophon' ).css( 'margin-top', margin + 'px' );
24		}
25	} );
26
27	/**
28	 * Enables menu toggle for small screens.
29	 */
30	( function() {
31		var nav = $( '#site-navigation' ), button, menu;
32		if ( ! nav )
33			return;
34
35		button = nav.find( '.menu-toggle' );
36		if ( ! button )
37			return;
38
39		// Hide button if menu is missing or empty.
40		menu = nav.find( '.nav-menu' );
41		if ( ! menu || ! menu.children().length ) {
42			button.hide();
43			return;
44		}
45
46		$( '.menu-toggle' ).on( 'click.twentythirteen', function() {
47			nav.toggleClass( 'toggled-on' );
48		} );
49	} )();
50
51	/**
52	 * Makes "skip to content" link work correctly in IE9 and Chrome for better
53	 * accessibility.
54	 *
55	 * @link http://www.nczonline.net/blog/2013/01/15/fixing-skip-to-content-links/
56	 */
57	_window.on( 'hashchange.twentythirteen', function() {
58		var element = document.getElementById( location.hash.substring( 1 ) );
59
60		if ( element ) {
61			if ( ! /^(?:a|select|input|button|textarea)$/i.test( element.tagName ) )
62				element.tabIndex = -1;
63
64			element.focus();
65		}
66	} );
67
68	/**
69	 * Arranges footer widgets vertically.
70	 */
71	if ( $.isFunction( $.fn.masonry ) ) {
72		var columnWidth = body.is( '.sidebar' ) ? 228 : 245;
73
74		$( '#secondary .widget-area' ).masonry( {
75			itemSelector: '.widget',
76			columnWidth: columnWidth,
77			gutterWidth: 20,
78			isRTL: body.is( '.rtl' )
79		} );
80	}
81} )( jQuery );