Wordpress/wp-content/themes/twentythirteen/js/functions.js

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JavaScript
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/**
* Functionality specific to Twenty Thirteen.
*
* Provides helper functions to enhance the theme experience.
*/
( function( $ ) {
var body = $( 'body' ),
_window = $( window );
/**
* Adds a top margin to the footer if the sidebar widget area is higher
* than the rest of the page, to help the footer always visually clear
* the sidebar.
*/
$( function() {
if ( body.is( '.sidebar' ) ) {
var sidebar = $( '#secondary .widget-area' ),
secondary = ( 0 == sidebar.length ) ? -40 : sidebar.height(),
margin = $( '#tertiary .widget-area' ).height() - $( '#content' ).height() - secondary;
if ( margin > 0 && _window.innerWidth() > 999 )
$( '#colophon' ).css( 'margin-top', margin + 'px' );
}
} );
/**
* Enables menu toggle for small screens.
*/
( function() {
var nav = $( '#site-navigation' ), button, menu;
if ( ! nav )
return;
button = nav.find( '.menu-toggle' );
if ( ! button )
return;
// Hide button if menu is missing or empty.
menu = nav.find( '.nav-menu' );
if ( ! menu || ! menu.children().length ) {
button.hide();
return;
}
$( '.menu-toggle' ).on( 'click.twentythirteen', function() {
nav.toggleClass( 'toggled-on' );
} );
} )();
/**
* Makes "skip to content" link work correctly in IE9 and Chrome for better
* accessibility.
*
* @link http://www.nczonline.net/blog/2013/01/15/fixing-skip-to-content-links/
*/
_window.on( 'hashchange.twentythirteen', function() {
var element = document.getElementById( location.hash.substring( 1 ) );
if ( element ) {
if ( ! /^(?:a|select|input|button|textarea)$/i.test( element.tagName ) )
element.tabIndex = -1;
element.focus();
}
} );
/**
* Arranges footer widgets vertically.
*/
if ( $.isFunction( $.fn.masonry ) ) {
var columnWidth = body.is( '.sidebar' ) ? 228 : 245;
$( '#secondary .widget-area' ).masonry( {
itemSelector: '.widget',
columnWidth: columnWidth,
gutterWidth: 20,
isRTL: body.is( '.rtl' )
} );
}
} )( jQuery );