Ajax: Always use script injection in globalEval

Fixes #14757
Ref bbdfbb4ee859fe9319b348d88120ddc2c9efbd63

src/core.js

@@ -275,17 +275,18 @@ jQuery.extend({
 	},
 
 	// Evaluates a script in a global context
-	// Workarounds based on findings by Jim Driscoll
-	// http://weblogs.java.net/blog/driscoll/archive/2009/09/08/eval-javascript-global-context
 	globalEval: function( data ) {
-		if ( data && jQuery.trim( data ) ) {
-			// We use execScript on Internet Explorer
-			// We use an anonymous function so that context is window
-			// rather than jQuery in Firefox
-			( window.execScript || function( data ) {
-				window[ "eval" ].call( window, data );
-			} )( data );
-		}
+		// Inspired by code by Andrea Giammarchi
+		// http://webreflection.blogspot.com/2007/08/global-scope-evaluation-and-dom.html
+		var head = document.head || jQuery( "head" )[ 0 ] || document.documentElement,
+			script = document.createElement( "script" );
+
+		script.text = data;
+
+		// Support: IE6
+		// Circumvent bugs with base elements (#2709 and #4378) by prepending
+		head.insertBefore( script, head.firstChild );
+		head.removeChild( script );
 	},
 
 	// Convert dashed to camelCase; used by the css and data modules

test/data/event/syncReady.html

@@ -8,7 +8,7 @@
 <body>
 
 <script type="text/javascript">
-jQuery( document ).ready(function () {
+jQuery( document ).ready(function() {
 	window.parent.iframeCallback( jQuery('#container').length === 1 );
 });
 </script>
@@ -17,7 +17,7 @@ jQuery( document ).ready(function () {
 	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

@@ -1468,24 +1468,18 @@ module( "ajax", {
 		}
 	});
 
-	test( "#11743 - jQuery.ajax() - script, throws exception", 1, function() {
-		throws(function() {
-			jQuery.ajax({
-				url: "data/badjson.js",
-				dataType: "script",
-				"throws": true,
-				// TODO find a way to test this asynchronously, too
-				async: false,
-				// Global events get confused by the exception
-				global: false,
-				success: function() {
-					ok( false, "Success." );
-				},
-				error: function() {
-					ok( false, "Error." );
-				}
-			});
-		}, "exception bubbled" );
+	asyncTest( "#11743 - jQuery.ajax() - script, throws exception", 1, function() {
+		var onerror = window.onerror;
+		window.onerror = function() {
+			ok( true, "Exception thrown" );
+			window.onerror = onerror;
+			start();
+		};
+		jQuery.ajax({
+			url: "data/badjson.js",
+			dataType: "script",
+			"throws": true
+		});
 	});
 
 	jQuery.each( [ "method", "type" ], function( _, globalOption ) {

test/unit/core.js

@@ -214,6 +214,19 @@ test( "globalEval", function() {
 	equal( window.globalEvalTest, 3, "Test context (this) is the window object" );
 });
 
+test( "globalEval execution after script injection (#7862)", 1, function() {
+	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() + ";");
+	ok( window.strictEvalTest - now < 500, "Code executed synchronously" );
+});
+
 test("noConflict", function() {
 	expect(7);
 

test/unit/manipulation.js

@@ -2263,23 +2263,33 @@ test( "Ensure oldIE creates a new set on appendTo (#8894)", function() {
 	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" );
 });
 
-test( "html() - script exceptions bubble (#11743)", function() {
+asyncTest( "html() - script exceptions bubble (#11743)", 2, function() {
 
-	expect( 2 );
+	var onerror = window.onerror;
 
-	throws(function() {
-		jQuery("#qunit-fixture").html("<script>undefined(); ok( false, 'Exception not thrown' );</script>");
-		ok( false, "Exception ignored" );
-	}, "Exception bubbled from inline script" );
+	setTimeout(function() {
+		window.onerror = onerror;
 
-	if ( jQuery.ajax ) {
-		throws(function() {
-			jQuery("#qunit-fixture").html("<script src='data/badcall.js'></script>");
-			ok( false, "Exception ignored" );
-		}, "Exception thrown in remote script" );
-	} else {
-		ok( true, "No jQuery.ajax" );
-	}
+		start();
+	}, 1000 );
+
+	window.onerror = function() {
+		ok( true, "Exception thrown" );
+
+		if ( jQuery.ajax ) {
+			window.onerror = function() {
+				ok( true, "Exception thrown in remote script" );
+			};
+
+			jQuery( "#qunit-fixture" ).html( "<script src='data/badcall.js'></script>" );
+			ok( true, "Exception ignored" );
+		} else {
+			ok( true, "No jQuery.ajax" );
+			ok( true, "No jQuery.ajax" );
+		}
+	};
+
+	jQuery( "#qunit-fixture" ).html( "<script>undefined();</script>" );
 });
 
 test( "checked state is cloned with clone()", function() {