Core: introduce createHTMLDocument in parseHTML; Safari 8/IE8 left out

Close gh-1506

src/core/parseHTML.js

 define([
 	"../core",
 	"./var/rsingleTag",
-	"../manipulation" // buildFragment
-], function( jQuery, rsingleTag ) {
+
+	// This is the only module that needs core/support
+	"./support",
+
+	// buildFragment
+	"../manipulation"
+], function( jQuery, rsingleTag, support ) {
 
 // data: string of html
 // context (optional): If specified, the fragment will be created in this context,
@@ -16,7 +21,11 @@ jQuery.parseHTML = function( data, context, keepScripts ) {
 		keepScripts = context;
 		context = false;
 	}
-	context = context || document;
+	// document.implementation stops scripts or inline event handlers from
+	// being executed immediately
+	context = context || ( support.createHTMLDocument ?
+		document.implementation.createHTMLDocument( "" ) :
+		document );
 
 	var parsed = rsingleTag.exec( data ),
 		scripts = !keepScripts && [];

src/core/support.js

+define([
+	"../var/support"
+], function( support ) {
+
+support.createHTMLDocument = (function() {
+	if ( !document.implementation.createHTMLDocument ) {
+		return false;
+	}
+	var doc = document.implementation.createHTMLDocument( "" );
+	doc.body.innerHTML = "<form></form><form></form>";
+	return doc.body.childNodes.length === 2;
+})();
+
+return support;
+});

test/unit/core.js

@@ -1348,6 +1348,22 @@ test("jQuery.parseHTML", function() {
 	equal( jQuery.parseHTML("<td><td>")[ 1 ].parentNode.nodeType, 11, "parentNode should be documentFragment" );
 });
 
+if ( jQuery.support.createHTMLDocument ) {
+	asyncTest("jQuery.parseHTML", function() {
+		expect ( 1 );
+
+		Globals.register("parseHTMLError");
+
+		jQuery.globalEval("parseHTMLError = false;");
+		jQuery.parseHTML( "<img src=x onerror='parseHTMLError = true'>" );
+
+		window.setTimeout(function() {
+			start();
+			equal( window.parseHTMLError, false, "onerror eventhandler has not been called." );
+		}, 2000);
+	});
+}
+
 test("jQuery.parseJSON", function() {
 	expect( 20 );
 

test/unit/support.js

@@ -79,6 +79,7 @@ testIframeWithCallback( "Check CSP (https://developer.mozilla.org/en-US/docs/Sec
 			"checkOn": true,
 			"clearCloneStyle": true,
 			"cors": true,
+			"createHTMLDocument": true,
 			"cssFloat": true,
 			"deleteExpando": true,
 			"focusinBubbles": false,
@@ -108,6 +109,7 @@ testIframeWithCallback( "Check CSP (https://developer.mozilla.org/en-US/docs/Sec
 			"checkOn": true,
 			"clearCloneStyle": false,
 			"cors": true,
+			"createHTMLDocument": true,
 			"cssFloat": true,
 			"deleteExpando": true,
 			"focusinBubbles": true,
@@ -137,6 +139,7 @@ testIframeWithCallback( "Check CSP (https://developer.mozilla.org/en-US/docs/Sec
 			"checkOn": true,
 			"clearCloneStyle": false,
 			"cors": false,
+			"createHTMLDocument": true,
 			"cssFloat": true,
 			"deleteExpando": true,
 			"focusinBubbles": true,
@@ -166,6 +169,7 @@ testIframeWithCallback( "Check CSP (https://developer.mozilla.org/en-US/docs/Sec
 			"checkOn": true,
 			"clearCloneStyle": true,
 			"cors": false,
+			"createHTMLDocument": false,
 			"cssFloat": false,
 			"deleteExpando": false,
 			"focusinBubbles": true,
@@ -186,7 +190,7 @@ testIframeWithCallback( "Check CSP (https://developer.mozilla.org/en-US/docs/Sec
 			"style": false,
 			"submitBubbles": false
 		};
-	} else if ( /(6|7|8)\.0(\.\d+|) safari/i.test( userAgent ) ) {
+	} else if ( /(6|7)\.0(\.\d+|) safari/i.test( userAgent ) ) {
 		expected = {
 			"ajax": true,
 			"boxSizingReliable": true,
@@ -195,6 +199,37 @@ testIframeWithCallback( "Check CSP (https://developer.mozilla.org/en-US/docs/Sec
 			"checkOn": true,
 			"clearCloneStyle": true,
 			"cors": true,
+			"createHTMLDocument": true,
+			"cssFloat": true,
+			"deleteExpando": true,
+			"focusinBubbles": false,
+			"html5Clone": true,
+			"htmlSerialize": true,
+			"input": true,
+			"leadingWhitespace": true,
+			"noCloneChecked": true,
+			"noCloneEvent": true,
+			"opacity": true,
+			"optDisabled": true,
+			"optSelected": true,
+			"ownLast": false,
+			"pixelPosition": false,
+			"radioValue": true,
+			"reliableHiddenOffsets": true,
+			"reliableMarginRight": true,
+			"style": true,
+			"submitBubbles": true
+		};
+	} else if ( /8.0(\.\d+|) safari/i.test( userAgent ) ) {
+		expected = {
+			"ajax": true,
+			"boxSizingReliable": true,
+			"changeBubbles": true,
+			"checkClone": true,
+			"checkOn": true,
+			"clearCloneStyle": true,
+			"cors": true,
+			"createHTMLDocument": false,
 			"cssFloat": true,
 			"deleteExpando": true,
 			"focusinBubbles": false,
@@ -224,6 +259,7 @@ testIframeWithCallback( "Check CSP (https://developer.mozilla.org/en-US/docs/Sec
 			"checkOn": true,
 			"clearCloneStyle": true,
 			"cors": true,
+			"createHTMLDocument": true,
 			"cssFloat": true,
 			"deleteExpando": true,
 			"focusinBubbles": false,
@@ -253,6 +289,7 @@ testIframeWithCallback( "Check CSP (https://developer.mozilla.org/en-US/docs/Sec
 			"checkOn": true,
 			"clearCloneStyle": true,
 			"cors": true,
+			"createHTMLDocument": true,
 			"cssFloat": true,
 			"deleteExpando": true,
 			"focusinBubbles": false,
@@ -282,6 +319,7 @@ testIframeWithCallback( "Check CSP (https://developer.mozilla.org/en-US/docs/Sec
 			"checkOn": false,
 			"clearCloneStyle": true,
 			"cors": true,
+			"createHTMLDocument": true,
 			"cssFloat": true,
 			"deleteExpando": true,
 			"focusinBubbles": false,
@@ -311,6 +349,7 @@ testIframeWithCallback( "Check CSP (https://developer.mozilla.org/en-US/docs/Sec
 			"checkOn": false,
 			"clearCloneStyle": false,
 			"cors": true,
+			"createHTMLDocument": true,
 			"cssFloat": true,
 			"deleteExpando": true,
 			"focusinBubbles": false,