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

   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 );