fixup! Core: Drop support for IE <11, iOS <10, Android Browser & PhantomJS

Author: mgol

src/core/isAttached.js

@@ -10,8 +10,12 @@ define( [
 		},
 		composed = { composed: true };
 
+	// Support: IE 9 - 11+, Edge 12 - 18+, iOS 10.0 - 10.2 only
 	// Check attachment across shadow DOM boundaries when possible (gh-3504)
-	if ( documentElement.attachShadow ) {
+	// Support: iOS 10.0-10.2 only
+	// Early iOS 10 versions support `attachShadow` but not `getRootNode`,
+	// leading to errors. We need to check for `getRootNode`.
+	if ( documentElement.getRootNode ) {
 		isAttached = function( elem ) {
 			return jQuery.contains( elem.ownerDocument, elem ) ||
 				elem.getRootNode( composed ) === elem.ownerDocument;

test/unit/css.js

@@ -641,7 +641,7 @@ QUnit.test( "show/hide detached nodes", function( assert ) {
 	span.remove();
 } );
 
-QUnit[ document.body.attachShadow ? "test" : "skip" ]( "show/hide shadow child nodes", function( assert ) {
+QUnit[ document.body.getRootNode ? "test" : "skip" ]( "show/hide shadow child nodes", function( assert ) {
 	assert.expect( 28 );
 	jQuery( "<div id='shadowHost'></div>" ).appendTo( "#qunit-fixture" );
 	var shadowHost = document.querySelector( "#shadowHost" );
@@ -1023,7 +1023,7 @@ QUnit[ jQuery.find.compile && jQuery.fn.toggle ? "test" : "skip" ]( "detached to
 		"cascade-hidden element in detached tree" );
 } );
 
-QUnit[ jQuery.find.compile && jQuery.fn.toggle && document.body.attachShadow ? "test" : "skip" ]( "shadow toggle()", function( assert ) {
+QUnit[ jQuery.find.compile && jQuery.fn.toggle && document.body.getRootNode ? "test" : "skip" ]( "shadow toggle()", function( assert ) {
 	assert.expect( 4 );
 	jQuery( "<div id='shadowHost'></div>" ).appendTo( "#qunit-fixture" );
 	var shadowHost = document.querySelector( "#shadowHost" );

test/unit/effects.js

@@ -221,7 +221,7 @@ supportjQuery.each( hideOptions, function( type, setup ) {
 		assert.expectJqData( this, $span, "olddisplay" );
 	} );
 
-	QUnit[ document.body.attachShadow ? "test" : "skip" ](
+	QUnit[ document.body.getRootNode ? "test" : "skip" ](
 		"Persist correct display value - " + type + " hidden, shadow child", function( assert ) {
 		assert.expect( 3 );