Core: drop the document.implementation.createHTMLDocument usage

The document.implementation.createHTMLDocument("") method creates inert
documents which is good but using it has introduced issues around anchor
elements href property not resolving according to the current document.
Because of that, this patch is getting backed out on 1.x/2.x branches.

(cherry-picked from c5c3073531)

Refs cfe468f29c
Refs gh-1505
Fixes gh-2941

src/core/parseHTML.js

@@ -2,11 +2,8 @@ define( [
 	"../core",
 	"../var/document",
 	"./var/rsingleTag",
-	"../manipulation/buildFragment",
+	"../manipulation/buildFragment"
-
+], function( jQuery, document, rsingleTag, buildFragment ) {
-	// This is the only module that needs core/support
-	"./support"
-], function( jQuery, document, rsingleTag, buildFragment, support ) {
 
 // data: string of html
 // context (optional): If specified, the fragment will be created in this context,
@@ -20,12 +17,7 @@ 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

@@ -1,21 +0,0 @@
-define( [
-	"../var/document",
-	"../var/support"
-], function( document, support ) {
-
-// Support: Safari 8+
-// In Safari 8 documents created via document.implementation.createHTMLDocument
-// collapse sibling forms: the second one becomes a child of the first one.
-// Because of that, this security measure has to be disabled in Safari 8.
-// https://bugs.webkit.org/show_bug.cgi?id=137337
-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

@@ -1541,22 +1541,6 @@ QUnit.test("jQuery.parseHTML", function( assert ) {
 	assert.equal( jQuery.parseHTML( "<td><td>" )[ 1 ].parentNode.nodeType, 11, "parentNode should be documentFragment" );
 } );
 
-if ( jQuery.support.createHTMLDocument && !/opera.*version\/12\.1/i.test( navigator.userAgent ) ) {
-	QUnit.asyncTest( "jQuery.parseHTML", function( assert ) {
-		assert.expect( 1 );
-
-		Globals.register( "parseHTMLError" );
-
-		jQuery.globalEval( "parseHTMLError = false;" );
-		jQuery.parseHTML( "<img src=x onerror='parseHTMLError = true'>" );
-
-		window.setTimeout( function() {
-			QUnit.start();
-			assert.equal( window.parseHTMLError, false, "onerror eventhandler has not been called." );
-		}, 2000 );
-	} );
-}
-
 QUnit.test( "jQuery.parseJSON", function( assert ) {
 	assert.expect( 20 );
 

test/unit/support.js

@@ -105,7 +105,6 @@ testIframeWithCallback(
 			"checkOn": true,
 			"clearCloneStyle": version >= 13,
 			"cors": true,
-			"createHTMLDocument": true,
 			"cssFloat": true,
 			"deleteExpando": true,
 			"enctype": true,
@@ -146,7 +145,6 @@ testIframeWithCallback(
 			"checkOn": true,
 			"clearCloneStyle": true,
 			"cors": true,
-			"createHTMLDocument": true,
 			"cssFloat": true,
 			"deleteExpando": true,
 			"enctype": true,
@@ -187,7 +185,6 @@ testIframeWithCallback(
 			"checkOn": true,
 			"clearCloneStyle": false,
 			"cors": true,
-			"createHTMLDocument": true,
 			"cssFloat": true,
 			"deleteExpando": true,
 			"enctype": true,
@@ -228,7 +225,6 @@ testIframeWithCallback(
 			"checkOn": true,
 			"clearCloneStyle": false,
 			"cors": false,
-			"createHTMLDocument": true,
 			"cssFloat": true,
 			"deleteExpando": true,
 			"enctype": true,
@@ -269,7 +265,6 @@ testIframeWithCallback(
 			"checkOn": true,
 			"clearCloneStyle": true,
 			"cors": false,
-			"createHTMLDocument": false,
 			"cssFloat": false,
 			"deleteExpando": false,
 			"enctype": true,
@@ -310,7 +305,6 @@ testIframeWithCallback(
 			"checkOn": true,
 			"clearCloneStyle": true,
 			"cors": false,
-			"createHTMLDocument": false,
 			"cssFloat": false,
 			"deleteExpando": false,
 			"enctype": true,
@@ -351,7 +345,6 @@ testIframeWithCallback(
 			"checkOn": true,
 			"clearCloneStyle": true,
 			"cors": false,
-			"createHTMLDocument": false,
 			"cssFloat": false,
 			"deleteExpando": false,
 			"enctype": true,
@@ -395,7 +388,6 @@ testIframeWithCallback(
 			"checkOn": true,
 			"clearCloneStyle": true,
 			"cors": true,
-			"createHTMLDocument": true,
 			"cssFloat": true,
 			"deleteExpando": true,
 			"enctype": true,
@@ -436,7 +428,6 @@ testIframeWithCallback(
 			"checkOn": true,
 			"clearCloneStyle": true,
 			"cors": true,
-			"createHTMLDocument": true,
 			"cssFloat": true,
 			"deleteExpando": true,
 			"enctype": true,
@@ -477,7 +468,6 @@ testIframeWithCallback(
 			"checkOn": true,
 			"clearCloneStyle": true,
 			"cors": true,
-			"createHTMLDocument": false,
 			"cssFloat": true,
 			"deleteExpando": true,
 			"enctype": true,
@@ -518,7 +508,6 @@ testIframeWithCallback(
 			"checkOn": false,
 			"clearCloneStyle": true,
 			"cors": true,
-			"createHTMLDocument": true,
 			"cssFloat": true,
 			"deleteExpando": true,
 			"enctype": true,
@@ -559,7 +548,6 @@ testIframeWithCallback(
 			"checkOn": true,
 			"clearCloneStyle": true,
 			"cors": true,
-			"createHTMLDocument": true,
 			"cssFloat": true,
 			"deleteExpando": true,
 			"enctype": true,
@@ -600,7 +588,6 @@ testIframeWithCallback(
 			"checkOn": true,
 			"clearCloneStyle": true,
 			"cors": true,
-			"createHTMLDocument": true,
 			"cssFloat": true,
 			"deleteExpando": true,
 			"enctype": true,
@@ -641,7 +628,6 @@ testIframeWithCallback(
 			"checkOn": true,
 			"clearCloneStyle": true,
 			"cors": true,
-			"createHTMLDocument": true,
 			"cssFloat": true,
 			"deleteExpando": true,
 			"enctype": true,
@@ -682,7 +668,6 @@ testIframeWithCallback(
 			"checkOn": true,
 			"clearCloneStyle": true,
 			"cors": true,
-			"createHTMLDocument": false,
 			"cssFloat": true,
 			"deleteExpando": true,
 			"enctype": true,
@@ -723,7 +708,6 @@ testIframeWithCallback(
 			"checkOn": true,
 			"clearCloneStyle": true,
 			"cors": true,
-			"createHTMLDocument": true,
 			"cssFloat": true,
 			"deleteExpando": true,
 			"enctype": true,
@@ -764,7 +748,6 @@ testIframeWithCallback(
 			"checkOn": true,
 			"clearCloneStyle": true,
 			"cors": true,
-			"createHTMLDocument": true,
 			"cssFloat": true,
 			"deleteExpando": true,
 			"enctype": true,
@@ -805,7 +788,6 @@ testIframeWithCallback(
 			"checkOn": false,
 			"clearCloneStyle": true,
 			"cors": true,
-			"createHTMLDocument": true,
 			"cssFloat": true,
 			"deleteExpando": true,
 			"enctype": true,
@@ -846,7 +828,6 @@ testIframeWithCallback(
 			"checkOn": false,
 			"clearCloneStyle": false,
 			"cors": true,
-			"createHTMLDocument": true,
 			"cssFloat": true,
 			"deleteExpando": true,
 			"enctype": true,