Remove unnecessary usage of Function.prototype.bind (#7783) but maintain API. Also fix bug with proxy failing when a name is provided. Fixes #8893.

src/core.js

@@ -752,45 +752,23 @@ jQuery.extend({
 	// Bind a function to a context, optionally partially applying any
 	// arguments.
 	proxy: function( fn, context ) {
-		var args, proxy;
-
-		// XXX BACKCOMPAT: Support old string method.
 		if ( typeof context === "string" ) {
-			fn = fn[ context ];
-			context = arguments[0];
+			var tmp = fn[ context ];
+			context = fn;
+			fn = tmp;
 		}
 
 		// Quick check to determine if target is callable, in the spec
 		// this throws a TypeError, but we will just return undefined.
-		if ( ! jQuery.isFunction( fn ) ) {
+		if ( !jQuery.isFunction( fn ) ) {
 			return undefined;
 		}
 
-		if ( jQuery.support.nativeBind ) {
-			// Native bind
-			args = slice.call( arguments, 1 );
-			if ( args.length ) {
-				proxy = Function.prototype.bind.apply( fn, args );
-			} else {
-				proxy = fn.bind( context );
-			}
-		} else {
-			// Simulated bind
-			args = slice.call( arguments, 2 );
-			if ( args.length ) {
-				proxy = function() {
-					return arguments.length ?
-						fn.apply( context, args.concat( slice.call( arguments ) ) ) :
-						fn.apply( context, args );
-				};
-			} else {
-				proxy = function() {
-					return arguments.length ?
-						fn.apply( context, arguments ) :
-						fn.call( context );
-				};
-			}
-		}
+		// Simulated bind
+		var args = slice.call( arguments, 2 ),
+			proxy = function() {
+				return fn.apply( context, args.concat( slice.call( arguments ) ) );
+			};
 
 		// Set the guid of unique handler to the same of original handler, so it can be removed
 		proxy.guid = fn.guid = fn.guid || proxy.guid || jQuery.guid++;

src/support.js

@@ -77,10 +77,6 @@ jQuery.support = (function() {
 		// Test setAttribute on camelCase class. If it works, we need attrFixes when doing get/setAttribute (ie6/7)
 		getSetAttribute: div.className !== "t",
 
-		// Test for presence of native Function#bind.
-		// Not in: >= Chrome 6, >= FireFox 3, Safari 5?, IE 9?, Opera 11?
-		nativeBind: jQuery.isFunction( Function.prototype.bind ),
-
 		// Will be defined later
 		submitBubbles: true,
 		changeBubbles: true,

test/unit/core.js

@@ -910,7 +910,7 @@ test("jQuery.isEmptyObject", function(){
 });
 
 test("jQuery.proxy", function(){
-	expect(6);
+	expect(7);
 
 	var test = function(){ equals( this, thisObject, "Make sure that scope is set properly." ); };
 	var thisObject = { foo: "bar", method: test };
@@ -921,6 +921,9 @@ test("jQuery.proxy", function(){
 	// Basic scoping
 	jQuery.proxy( test, thisObject )();
 
+	// Another take on it
+	jQuery.proxy( thisObject, "method" )();
+
 	// Make sure it doesn't freak out
 	equals( jQuery.proxy( null, thisObject ), undefined, "Make sure no function was returned." );