From c003cd6bc8336927dad70889ee24e176f90b25a9 Mon Sep 17 00:00:00 2001
From: Dave Methvin <dave.methvin@gmail.com>
Date: Wed, 14 Oct 2015 15:07:53 -0400
Subject: [PATCH] Attributes: Use simpler boolean check vs a function call

Ref gh-2491

(cherry picked from commit 4bf1a09522955eb52de1fafb4ee1ecc5982b7a3e)
---
 src/attributes/classes.js | 7 ++-----
 test/unit/attributes.js   | 6 +++++-
 2 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/src/attributes/classes.js b/src/attributes/classes.js
index 1d24a1851..15a37bc99 100644
--- a/src/attributes/classes.js
+++ b/src/attributes/classes.js
@@ -100,10 +100,7 @@ jQuery.fn.extend( {
 
 	toggleClass: function( value, stateVal ) {
 		var type = typeof value,
-			classNames = type === "string" ? value.match( rnotwhite ) : "",
-			checker = typeof stateVal === "boolean" ?
-				function() { return !stateVal; } :
-				jQuery.fn.hasClass;
+			classNames = type === "string" ? value.match( rnotwhite ) : [];
 
 		return this.each( function( i ) {
 			var className,
@@ -118,7 +115,7 @@ jQuery.fn.extend( {
 			// Toggle individual class names based on presence or stateVal
 			while ( ( className = classNames[ c++ ] ) ) {
 
-				if ( checker.call( self, className ) ) {
+				if ( stateVal === false || stateVal !== true && self.hasClass( className ) ) {
 					self.removeClass( className );
 				} else {
 					self.addClass( className );
diff --git a/test/unit/attributes.js b/test/unit/attributes.js
index 028931c70..ba9d551aa 100644
--- a/test/unit/attributes.js
+++ b/test/unit/attributes.js
@@ -1220,7 +1220,7 @@ QUnit.test( "removeClass(undefined) is a no-op", function( assert ) {
 } );
 
 var testToggleClass = function( valueObj, assert ) {
-	assert.expect( 9 );
+	assert.expect( 11 );
 
 	var e = jQuery( "#firstp" );
 	assert.ok( !e.is( ".test" ), "Assert class not present" );
@@ -1232,8 +1232,12 @@ var testToggleClass = function( valueObj, assert ) {
 	// class name with a boolean
 	e.toggleClass( valueObj( "test" ), false );
 	assert.ok( !e.is( ".test" ), "Assert class not present" );
+	e.toggleClass( valueObj( "test" ), false );
+	assert.ok( !e.is( ".test" ), "Assert class still not present" );
 	e.toggleClass( valueObj( "test" ), true );
 	assert.ok( e.is( ".test" ), "Assert class present" );
+	e.toggleClass( valueObj( "test" ), true );
+	assert.ok( e.is( ".test" ), "Assert class still present" );
 	e.toggleClass( valueObj( "test" ), false );
 	assert.ok( !e.is( ".test" ), "Assert class not present" );
 
-- 
2.39.5