Core: Deprecate jQuery.isWindow

Fixes gh-3629
Close gh-3702

src/core.js

@@ -16,10 +16,11 @@ define( [
 	"./var/fnToString",
 	"./var/ObjectFunctionString",
 	"./var/support",
+	"./var/isWindow",
 	"./core/DOMEval"
 ], function( arr, document, getProto, slice, concat, push, indexOf,
 	class2type, toString, hasOwn, fnToString, ObjectFunctionString,
-	support, DOMEval ) {
+	support, isWindow, DOMEval ) {
 
 "use strict";
 
@@ -220,10 +221,6 @@ jQuery.extend( {
 		return typeof obj === "function" && typeof obj.nodeType !== "number";
 	},
 
-	isWindow: function( obj ) {
-		return obj != null && obj === obj.window;
-	},
-
 	isNumeric: function( obj ) {
 
 		// As of jQuery 3.0, isNumeric is limited to
@@ -469,7 +466,7 @@ function isArrayLike( obj ) {
 	var length = !!obj && "length" in obj && obj.length,
 		type = jQuery.type( obj );
 
-	if ( jQuery.isFunction( obj ) || jQuery.isWindow( obj ) ) {
+	if ( jQuery.isFunction( obj ) || isWindow( obj ) ) {
 		return false;
 	}
 

src/deprecated.js

@@ -1,7 +1,8 @@
 define( [
 	"./core",
-	"./core/nodeName"
-], function( jQuery, nodeName ) {
+	"./core/nodeName",
+	"./var/isWindow"
+], function( jQuery, nodeName, isWindow ) {
 
 "use strict";
 
@@ -36,5 +37,6 @@ jQuery.holdReady = function( hold ) {
 jQuery.isArray = Array.isArray;
 jQuery.parseJSON = JSON.parse;
 jQuery.nodeName = nodeName;
+jQuery.isWindow = isWindow;
 
 } );

src/dimensions.js

@@ -1,8 +1,9 @@
 define( [
 	"./core",
 	"./core/access",
+	"./var/isWindow",
 	"./css"
-], function( jQuery, access ) {
+], function( jQuery, access, isWindow ) {
 
 "use strict";
 
@@ -19,7 +20,7 @@ jQuery.each( { Height: "height", Width: "width" }, function( name, type ) {
 			return access( this, function( elem, type, value ) {
 				var doc;
 
-				if ( jQuery.isWindow( elem ) ) {
+				if ( isWindow( elem ) ) {
 
 					// $( window ).outerWidth/Height return w/h including scrollbars (gh-1729)
 					return funcName.indexOf( "outer" ) === 0 ?

src/event/trigger.js

@@ -4,9 +4,9 @@ define( [
 	"../data/var/dataPriv",
 	"../data/var/acceptData",
 	"../var/hasOwn",
-
+	"../var/isWindow",
 	"../event"
-], function( jQuery, document, dataPriv, acceptData, hasOwn ) {
+], function( jQuery, document, dataPriv, acceptData, hasOwn, isWindow ) {
 
 "use strict";
 
@@ -76,7 +76,7 @@ jQuery.extend( jQuery.event, {
 
 		// Determine event propagation path in advance, per W3C events spec (#9951)
 		// Bubble up to document, then to window; watch for a global ownerDocument var (#9724)
-		if ( !onlyHandlers && !special.noBubble && !jQuery.isWindow( elem ) ) {
+		if ( !onlyHandlers && !special.noBubble && !isWindow( elem ) ) {
 
 			bubbleType = special.delegateType || type;
 			if ( !rfocusMorph.test( bubbleType + type ) ) {
@@ -128,7 +128,7 @@ jQuery.extend( jQuery.event, {
 
 				// Call a native DOM method on the target with the same name as the event.
 				// Don't do default actions on window, that's where global variables be (#6170)
-				if ( ontype && jQuery.isFunction( elem[ type ] ) && !jQuery.isWindow( elem ) ) {
+				if ( ontype && jQuery.isFunction( elem[ type ] ) && !isWindow( elem ) ) {
 
 					// Don't re-trigger an onFOO event when we call its FOO() method
 					tmp = elem[ ontype ];

src/offset.js

@@ -7,12 +7,12 @@ define( [
 	"./css/curCSS",
 	"./css/addGetHookIf",
 	"./css/support",
-
+	"./var/isWindow",
 	"./core/init",
 	"./css",
 	"./selector" // contains
 ], function( jQuery, access, document, documentElement, rnumnonpx,
-             curCSS, addGetHookIf, support ) {
+             curCSS, addGetHookIf, support, isWindow ) {
 
 "use strict";
 
@@ -186,7 +186,7 @@ jQuery.each( { scrollLeft: "pageXOffset", scrollTop: "pageYOffset" }, function(
 
 			// Coalesce documents and windows
 			var win;
-			if ( jQuery.isWindow( elem ) ) {
+			if ( isWindow( elem ) ) {
 				win = elem;
 			} else if ( elem.nodeType === 9 ) {
 				win = elem.defaultView;

src/var/isWindow.js

@@ -0,0 +1,8 @@
+define( function() {
+	"use strict";
+
+	return function isWindow( obj ) {
+		return obj != null && obj === obj.window;
+	};
+
+} );