Changed .is() to .hasClass() where possible for performance.

Author: jaspermdegroot

js/jquery.mobile.navigation.js

@@ -842,7 +842,7 @@ define( [
 			if ( active.url &&
 				active.url.indexOf( dialogHashKey ) > -1 &&
 				$.mobile.activePage &&
-				!$.mobile.activePage.is( ".ui-dialog" ) &&
+				!$.mobile.activePage.hasClass( "ui-dialog" ) &&
 				urlHistory.activeIndex > 0 ) {
 				settings.changeHash = false;
 				alreadyThere = true;
@@ -1280,7 +1280,7 @@ define( [
 
 				// If current active page is not a dialog skip the dialog and continue
 				// in the same direction
-				if ( $.mobile.activePage && !$.mobile.activePage.is( ".ui-dialog" ) ) {
+				if ( $.mobile.activePage && !$.mobile.activePage.hasClass( "ui-dialog" ) ) {
 					//determine if we're heading forward or backward and continue accordingly past
 					//the current dialog
 					if( data.direction === "back" ) {

js/widgets/collapsible.js

@@ -147,7 +147,7 @@ $.widget( "mobile.collapsible", $.mobile.widget, {
 			})
 			.bind( "click", function( event ) {
 
-				var type = collapsibleHeading.is( ".ui-collapsible-heading-collapsed" ) ? "expand" : "collapse";
+				var type = collapsibleHeading.hasClass( "ui-collapsible-heading-collapsed" ) ? "expand" : "collapse";
 
 				collapsible.trigger( type );
 

js/widgets/fixedToolbar.js

@@ -75,7 +75,7 @@ define( [ "jquery", "../jquery.mobile.widget", "../jquery.mobile.core", "../jque
 			if ( tclass && tclass !== "none" ) {
 				// use appropriate slide for header or footer
 				if ( tclass === "slide" ) {
-					tclass = this.element.is( ".ui-header" ) ? "slidedown" : "slideup";
+					tclass = this.element.hasClass( "ui-header" ) ? "slidedown" : "slideup";
 				}
 
 				this.element.addClass( tclass );
@@ -153,7 +153,7 @@ define( [ "jquery", "../jquery.mobile.widget", "../jquery.mobile.core", "../jque
 		// This will set the content element's top or bottom padding equal to the toolbar's height
 		updatePagePadding: function( tbPage ) {
 			var $el = this.element,
-				header = $el.is( ".ui-header" ),
+				header = $el.hasClass( "ui-header" ),
 				pos = parseFloat( $el.css( header ? "top" : "bottom" ) );
 
 			// This behavior only applies to "fixed", not "fullscreen"
@@ -260,7 +260,7 @@ define( [ "jquery", "../jquery.mobile.widget", "../jquery.mobile.core", "../jque
 
 		_destroy: function() {
 			var $el = this.element,
-				header = $el.is( ".ui-header" );
+				header = $el.hasClass( "ui-header" );
 
 			$el.closest( ".ui-page" ).css( "padding-" + ( header ? "top" : "bottom" ), "" );
 			$el.removeClass( "ui-header-fixed ui-footer-fixed ui-header-fullscreen ui-footer-fullscreen in out fade slidedown slideup ui-fixed-hidden" );

js/widgets/fixedToolbar.workarounds.js

@@ -46,7 +46,7 @@ define( [ "jquery", "../jquery.mobile.widget", "../jquery.mobile.core", "../jque
 			//Utility class for checking header and footer positions relative to viewport
 			_viewportOffset: function() {
 				var $el = this.element,
-					header = $el.is( ".ui-header" ),
+					header = $el.hasClass( "ui-header" ),
 					offset = Math.abs($el.offset().top - $.mobile.window.scrollTop());
 				if( !header ) {
 					offset = Math.round(offset - $.mobile.window.height() + $el.outerHeight())-60;

js/widgets/forms/checkboxradio.js

@@ -73,7 +73,7 @@ $.widget( "mobile.checkboxradio", $.mobile.widget, {
 
 		label.bind({
 			vmouseover: function( event ) {
-				if ( $( this ).parent().is( ".ui-disabled" ) ) {
+				if ( $( this ).parent().hasClass( "ui-disabled" ) ) {
 					event.stopPropagation();
 				}
 			},

js/widgets/forms/select.custom.js

@@ -196,7 +196,7 @@ define( [
 						case 38:
 							prev = li.prev().not( ".ui-selectmenu-placeholder" );
 
-							if ( prev.is( ".ui-li-divider" ) ) {
+							if ( prev.hasClass( "ui-li-divider" ) ) {
 								prev = prev.prev();
 							}
 
@@ -214,7 +214,7 @@ define( [
 						case 40:
 							next = li.next();
 
-							if ( next.is( ".ui-li-divider" ) ) {
+							if ( next.hasClass( "ui-li-divider" ) ) {
 								next = next.next();
 							}
 
@@ -319,7 +319,7 @@ define( [
 							if ( self.isMultiple ) {
 								item.find( ".ui-icon" ).removeClass( "ui-icon-checkbox-off" ).addClass( "ui-icon-checkbox-on" );
 							} else {
-								if ( item.is( ".ui-selectmenu-placeholder" ) ) {
+								if ( item.hasClass( "ui-selectmenu-placeholder" ) ) {
 									item.next().addClass( $.mobile.activeBtnClass );
 								} else {
 									item.addClass( $.mobile.activeBtnClass );

js/widgets/forms/select.js

@@ -80,7 +80,7 @@ $.widget( "mobile.selectmenu", $.mobile.widget, {
 		var wrapper = this.element.parents( ".ui-select" );
 		if ( wrapper.length > 0 ) {
 			if ( wrapper.is( ".ui-btn-left, .ui-btn-right" ) ) {
-				this.element.addClass( wrapper.is( ".ui-btn-left" ) ? "ui-btn-left" : "ui-btn-right" );
+				this.element.addClass( wrapper.hasClass( "ui-btn-left" ) ? "ui-btn-left" : "ui-btn-right" );
 			}
 			this.element.insertAfter( wrapper );
 			wrapper.remove();

js/widgets/forms/slider.js

@@ -466,7 +466,7 @@ $.widget( "mobile.slider", $.mobile.widget, {
 				bPercent = percent === 100 ? 0 : Math.min( handlePercent + 100 - aPercent, 100 );
 
 			this._labels.each(function() {
-				var ab = $( this ).is( ".ui-slider-label-a" );
+				var ab = $( this ).hasClass( "ui-slider-label-a" );
 				$( this ).width( ( ab ? aPercent : bPercent  ) + "%" );
 			});
 		}

js/widgets/listview.js

@@ -91,7 +91,7 @@ $.widget( "mobile.listview", $.mobile.widget, {
 			img = $( this._findFirstElementByTagName( containers[ i ].firstChild, "nextSibling", "img", "IMG" ) );
 			if ( img.length ) {
 				img.addClass( "ui-li-thumb" );
-				$( this._findFirstElementByTagName( img[ 0 ].parentNode, "parentNode", "li", "LI" ) ).addClass( img.is( ".ui-li-icon" ) ? "ui-li-has-icon" : "ui-li-has-thumb" );
+				$( this._findFirstElementByTagName( img[ 0 ].parentNode, "parentNode", "li", "LI" ) ).addClass( img.hasClass( "ui-li-icon" ) ? "ui-li-has-icon" : "ui-li-has-thumb" );
 			}
 		}
 	},

js/widgets/popup.js

@@ -825,7 +825,7 @@ define( [
 			urlHistory = $.mobile.urlHistory;
 			hashkey = $.mobile.dialogHashKey;
 			activePage = $.mobile.activePage;
-			currentIsDialog = activePage.is( ".ui-dialog" );
+			currentIsDialog = activePage.hasClass( "ui-dialog" );
 			this._myUrl = url = urlHistory.getActive().url;
 			hasHash = ( url.indexOf( hashkey ) > -1 ) && !currentIsDialog && ( urlHistory.activeIndex > 0 );