src/core.js

@@ -263,11 +263,28 @@ jQuery.extend( {
 
 	// Evaluates a script in a global context
 	globalEval: function( code, context ) {
-		context = context || document;
-		var script = context.createElement( "script" );
+		var script,
+			indirect = eval;
 
-		script.text = code;
-		context.head.appendChild( script ).parentNode.removeChild( script );
+		code = jQuery.trim( code );
+
+		if ( code ) {
+
+			// If the code includes a valid, prologue position
+			// strict mode pragma, execute code by injecting a
+			// script tag into the document.
+			if ( code.indexOf( "use strict" ) === 1 ) {
+				script = document.createElement( "script" );
+				script.text = code;
+				context.head.appendChild( script ).parentNode.removeChild( script );
+			} else {
+
+				// Otherwise, avoid the DOM node creation, insertion
+				// and removal by using an indirect global eval
+
+				indirect( code );
+			}
+		}
 	},
 
 	// Convert dashed to camelCase; used by the css and data modules

src/effects.js

@@ -23,13 +23,6 @@ var
 	rfxtypes = /^(?:toggle|show|hide)$/,
 	rrun = /queueHooks$/;
 
-function raf() {
-	if ( timerId ) {
-		window.requestAnimationFrame( raf );
-		jQuery.fx.tick();
-	}
-}
-
 // Animations created synchronously will run synchronously
 function createFxNow() {
 	window.setTimeout( function() {
@@ -408,15 +401,9 @@ jQuery.speed = function( speed, easing, fn ) {
 		easing: fn && easing || easing && !jQuery.isFunction( easing ) && easing
 	};
 
-	// Go to the end state if fx are off or if document is hidden
-	if ( jQuery.fx.off || document.hidden ) {
-		opt.duration = 0;
-
-	} else {
-		opt.duration = typeof opt.duration === "number" ?
-			opt.duration : opt.duration in jQuery.fx.speeds ?
-				jQuery.fx.speeds[ opt.duration ] : jQuery.fx.speeds._default;
-	}
+	opt.duration = jQuery.fx.off ? 0 : typeof opt.duration === "number" ?
+		opt.duration : opt.duration in jQuery.fx.speeds ?
+			jQuery.fx.speeds[ opt.duration ] : jQuery.fx.speeds._default;
 
 	// Normalize opt.queue - true/undefined/null -> "fx"
 	if ( opt.queue == null || opt.queue === true ) {
@@ -620,18 +607,12 @@ jQuery.fx.timer = function( timer ) {
 jQuery.fx.interval = 13;
 jQuery.fx.start = function() {
 	if ( !timerId ) {
-		timerId = window.requestAnimationFrame ?
-			window.requestAnimationFrame( raf ) :
-			window.setInterval( jQuery.fx.tick, jQuery.fx.interval );
+		timerId = window.setInterval( jQuery.fx.tick, jQuery.fx.interval );
 	}
 };
 
 jQuery.fx.stop = function() {
-	if ( window.cancelAnimationFrame ) {
-		window.cancelAnimationFrame( timerId );
-	} else {
-		window.clearInterval( timerId );
-	}
+	window.clearInterval( timerId );
 
 	timerId = null;
 };

src/manipulation.js

@@ -192,7 +192,7 @@ function domManip( collection, args, callback, ignored ) {
 								jQuery._evalUrl( node.src );
 							}
 						} else {
-							jQuery.globalEval( node.textContent.replace( rcleanScript, "" ), doc );
+							jQuery.globalEval( node.textContent.replace( rcleanScript, "" ) );
 						}
 					}
 				}

test/data/event/syncReady.html

@@ -17,7 +17,7 @@
 	oldIE into thinking the dom is ready, but it's not...
 	leaving this check here for future trailblazers to attempt
 	fixing this...-->
-<script type="text/javascript" src="../longLoadScript.php?sleep=1"></script>
+<script type="text/javascript" src="longLoadScript.php?sleep=1"></script>
 <div id="container" style="height: 300px"></div>
 </body>
 </html>

test/unit/ajax.js

@@ -1624,9 +1624,17 @@ if ( typeof window.ArrayBuffer === "undefined" || typeof new XMLHttpRequest().re
 		jQuery.ajax( {
 			url: "data/badjson.js",
 			dataType: "script",
-			throws: true
-		} );
-	} );
+			throws: true,
+			// Global events get confused by the exception
+			global: false,
+			success: function() {
+				assert.ok( false, "Success." );
+			},
+			error: function() {
+				assert.ok( false, "Error." );
+			}
+		});
+	});
 
 	jQuery.each( [ "method", "type" ], function( _, globalOption ) {
 		function request( assert, option ) {

test/unit/core.js

@@ -170,21 +170,6 @@ QUnit.test( "globalEval with 'use strict'", function( assert ) {
 	assert.equal( window.strictEvalTest, 1, "Test variable declarations are global (strict mode)" );
 } );
 
-QUnit.test( "globalEval execution after script injection (#7862)", function( assert ) {
-	assert.expect( 1 );
-
-	var now,
-		script = document.createElement( "script" );
-
-	script.src = "data/longLoadScript.php?sleep=2";
-
-	now = jQuery.now();
-	document.body.appendChild( script );
-
-	jQuery.globalEval( "var strictEvalTest = " + jQuery.now() + ";" );
-	assert.ok( window.strictEvalTest - now < 500, "Code executed synchronously" );
-} );
-
 // This is not run in AMD mode
 if ( jQuery.noConflict ) {
 	QUnit.test( "noConflict", function( assert ) {

test/unit/effects.js

@@ -5,11 +5,8 @@ if ( !jQuery.fx ) {
 	return;
 }
 
-var oldRaf = window.requestAnimationFrame;
-
 QUnit.module( "effects", {
 	setup: function() {
-		window.requestAnimationFrame = null;
 		this.sandbox = sinon.sandbox.create();
 		this.clock = this.sandbox.useFakeTimers( 505877050 );
 		this._oldInterval = jQuery.fx.interval;
@@ -22,7 +19,6 @@ QUnit.module( "effects", {
 		jQuery.now = Date.now;
 		jQuery.fx.stop();
 		jQuery.fx.interval = this._oldInterval;
-		window.requestAnimationFrame = oldRaf;
 		return moduleTeardown.apply( this, arguments );
 	}
 } );
@@ -2317,35 +2313,6 @@ QUnit.test( "Respect display value on inline elements (#14824)", function( asser
 	clock.tick( 800 );
 } );
 
-QUnit.test( "Animation should go to its end state if document.hidden = true", function( assert ) {
-	assert.expect( 1 );
-
-	var height;
-	if ( Object.defineProperty ) {
-
-		// Can't rewrite document.hidden property if its host property
-		try {
-			Object.defineProperty( document, "hidden", {
-				get: function() {
-					return true;
-				}
-			} );
-		} catch ( e ) {}
-	} else {
-		document.hidden = true;
-	}
-
-	if ( document.hidden ) {
-		height = jQuery( "#qunit-fixture" ).animate( { height: 500 } ).height();
-
-		assert.equal( height, 500, "Animation should happen immediately if document.hidden = true" );
-		jQuery( document ).removeProp( "hidden" );
-
-	} else {
-		assert.ok( true, "Can't run the test since we can't reproduce correct environment for it" );
-	}
-} );
-
 QUnit.test( "jQuery.easing._default (gh-2218)", function( assert ) {
 	assert.expect( 2 );
 

test/unit/manipulation.js

@@ -2183,17 +2183,6 @@ testIframeWithCallback(
 	}
 );
 
-testIframeWithCallback(
-	"domManip executes scripts in iframes in the iframes' context",
-	"manipulation/scripts-context.html",
-	function( frameWindow, bodyElement, html, assert ) {
-		assert.expect( 2 );
-		jQuery( bodyElement ).append( html );
-		assert.ok( !window.scriptTest, "script executed in iframe context" );
-		assert.ok( frameWindow.scriptTest, "script executed in iframe context" );
-	}
-);
-
 QUnit.test( "jQuery.clone - no exceptions for object elements #9587", function( assert ) {
 
 	assert.expect( 1 );
@@ -2297,45 +2286,28 @@ QUnit.test( "Ensure oldIE creates a new set on appendTo (#8894)", function( asse
 	assert.strictEqual( jQuery( "<p/>" ).appendTo( "<div/>" ).end().length, jQuery( "<p>test</p>" ).appendTo( "<div/>" ).end().length, "Elements created with createElement and with createDocumentFragment should be treated alike" );
 } );
 
-QUnit.asyncTest( "html() - script exceptions bubble (#11743)", 2, function( assert ) {
+QUnit.test( "html() - script exceptions bubble (#11743)", function( assert ) {
+	assert.expect( 3 );
 
-	// Support: Android 2.3 only
-	// Android 2.3 doesn't fire the window.onerror handler, just accept the reality there.
-	if ( /android 2\.3/i.test( navigator.userAgent ) ) {
-		assert.ok( true, "Test skipped, Android 2.3 doesn't fire window.onerror for " +
-			"errors in dynamically included scripts" );
-		assert.ok( true, "Test skipped, Android 2.3 doesn't fire window.onerror for " +
-			"errors in dynamically included scripts" );
-		QUnit.start();
-		return;
-	}
+	assert.throws(function() {
+		jQuery("#qunit-fixture").html("<script>undefined(); ok( false, 'Exception not thrown' );</script>");
+		assert.ok( false, "Exception ignored" );
+	}, "Exception bubbled from inline script" );
 
-	var onerror = window.onerror;
+	if ( jQuery.ajax ) {
+		var onerror = window.onerror;
+		window.onerror = function() {
+			assert.ok( true, "Exception thrown in remote script" );
+		};
 
-	setTimeout( function() {
+		jQuery("#qunit-fixture").html("<script src='data/badcall.js'></script>");
+		assert.ok( true, "Exception ignored" );
 		window.onerror = onerror;
-
-		QUnit.start();
-	}, 1000 );
-
-	window.onerror = function() {
-		assert.ok( true, "Exception thrown" );
-
-		if ( jQuery.ajax ) {
-			window.onerror = function() {
-				assert.ok( true, "Exception thrown in remote script" );
-			};
-
-			jQuery( "#qunit-fixture" ).html( "<script src='data/badcall.js'></script>" );
-			assert.ok( true, "Exception ignored" );
-		} else {
-			assert.ok( true, "No jQuery.ajax" );
-			assert.ok( true, "No jQuery.ajax" );
-		}
-	};
-
-	jQuery( "#qunit-fixture" ).html( "<script>undefined();</script>" );
-} );
+	} else {
+		assert.ok( true, "No jQuery.ajax" );
+		assert.ok( true, "No jQuery.ajax" );
+	}
+});
 
 QUnit.test( "checked state is cloned with clone()", function( assert ) {