Initial commit. State 04.2021.

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

@@ -0,0 +1,132 @@
+/**
+ * Functionality specific to Twenty Thirteen.
+ *
+ * Provides helper functions to enhance the theme experience.
+ */
+
+( function( $ ) {
+	var body    = $( 'body' ),
+	    _window = $( window ),
+		nav, button, menu;
+
+	nav = $( '#site-navigation' );
+	button = nav.find( '.menu-toggle' );
+	menu = nav.find( '.nav-menu' );
+
+	/**
+	 * 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() {
+		if ( ! nav || ! button ) {
+			return;
+		}
+
+		// Hide button if menu is missing or empty.
+		if ( ! menu || ! menu.children().length ) {
+			button.hide();
+			return;
+		}
+
+		button.on( 'click.twentythirteen', function() {
+			nav.toggleClass( 'toggled-on' );
+			if ( nav.hasClass( 'toggled-on' ) ) {
+				$( this ).attr( 'aria-expanded', 'true' );
+				menu.attr( 'aria-expanded', 'true' );
+			} else {
+				$( this ).attr( 'aria-expanded', 'false' );
+				menu.attr( 'aria-expanded', 'false' );
+			}
+		} );
+
+		// Fix sub-menus for touch devices.
+		if ( 'ontouchstart' in window ) {
+			menu.find( '.menu-item-has-children > a, .page_item_has_children > a' ).on( 'touchstart.twentythirteen', function( e ) {
+				var el = $( this ).parent( 'li' );
+
+				if ( ! el.hasClass( 'focus' ) ) {
+					e.preventDefault();
+					el.toggleClass( 'focus' );
+					el.siblings( '.focus' ).removeClass( 'focus' );
+				}
+			} );
+		}
+
+		// Better focus for hidden submenu items for accessibility.
+		menu.find( 'a' ).on( 'focus.twentythirteen blur.twentythirteen', function() {
+			$( this ).parents( '.menu-item, .page_item' ).toggleClass( 'focus' );
+		} );
+	} )();
+
+	/**
+	 * @summary Add or remove ARIA attributes.
+	 * Uses jQuery's width() function to determine the size of the window and add
+	 * the default ARIA attributes for the menu toggle if it's visible.
+	 * @since Twenty Thirteen 1.5
+	 */
+	function onResizeARIA() {
+		if ( 643 > _window.width() ) {
+			button.attr( 'aria-expanded', 'false' );
+			menu.attr( 'aria-expanded', 'false' );
+			button.attr( 'aria-controls', 'primary-menu' );
+		} else {
+			button.removeAttr( 'aria-expanded' );
+			menu.removeAttr( 'aria-expanded' );
+			button.removeAttr( 'aria-controls' );
+		}
+	}
+
+	_window
+		.on( 'load.twentythirteen', onResizeARIA )
+		.on( 'resize.twentythirteen', function() {
+			onResizeARIA();
+	} );
+
+	/**
+	 * Makes "skip to content" link work correctly in IE9 and Chrome for better
+	 * accessibility.
+	 *
+	 * @link http://www.nczonline.net/blog/2013/01/15/fixing-skip-to-content-links/
+	 */
+	_window.on( 'hashchange.twentythirteen', function() {
+		var element = document.getElementById( location.hash.substring( 1 ) );
+
+		if ( element ) {
+			if ( ! /^(?:a|select|input|button|textarea)$/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 );