Fixes #4964. Adds a statusCode object together with a new statusCode method on the jXHR object (deferred behaviour). They accept a map of statusCode/callback(s). Callbacks are fired when the status code of the response correponds to the key (as a success or an error callback depending on how the request completed). Unit tests added.

src/ajax.js

@@ -265,6 +265,8 @@ jQuery.extend({
 			// Deferreds
 			deferred = jQuery.Deferred(),
 			completeDeferred = jQuery._Deferred(),
+			// Status-dependent callbacks
+			statusCode = s.statusCode || {},
 			// Headers (they are sent all at once)
 			requestHeaders = {},
 			// Response headers
@@ -520,6 +522,9 @@ jQuery.extend({
 				deferred.fireReject( callbackContext , [ jXHR , statusText , error ] );
 			}
 
+			// Status-dependent callbacks
+			jXHR.statusCode( statusCode );
+
 			if ( s.global ) {
 				globalEventContext.trigger( "ajax" + ( isSuccess ? "Success" : "Error" ) ,
 						[ jXHR , s , isSuccess ? success : error ] );
@@ -543,6 +548,28 @@ jQuery.extend({
 		jXHR.error = jXHR.fail;
 		jXHR.complete = completeDeferred.done;
 
+		// Status-dependent callbacks
+		jXHR.statusCode = function( map ) {
+			if ( map ) {
+				var resolved = jXHR.isResolved(),
+					tmp;
+				if ( resolved || jXHR.isRejected() ) {
+					tmp = map[ jXHR.status ];
+					if ( tmp ) {
+						if ( map === statusCode ) {
+							delete statusCode[ jXHR.status ];
+						}
+						jXHR[ resolved ? "done" : "fail" ]( tmp );
+					}
+				} else {
+					for( tmp in map ) {
+						statusCode[ tmp ] = [ statusCode[ tmp ] , map[ tmp ] ];
+					}
+				}
+			}
+			return this;
+		};
+
 		// Remove hash character (#7531: and string promotion)
 		s.url = ( "" + s.url ).replace( rhash , "" );
 

test/unit/ajax.js

@@ -1915,6 +1915,76 @@ test( "jQuery.ajax - Location object as url (#7531)", 1, function () {
 	ok( success, "document.location did not generate exception" );
 });
 
+test( "jQuery.ajax - statusCode" , function() {
+
+	var count = 10;
+
+	expect( 16 );
+	stop();
+
+	function countComplete() {
+		if ( ! --count ) {
+			start();
+		}
+	}
+
+	function createStatusCodes( name , isSuccess ) {
+		name = "Test " + name + " " + ( isSuccess ? "success" : "error" );
+		return {
+			200: function() {
+				ok( isSuccess , name );
+			},
+			404: function() {
+				ok( ! isSuccess , name );
+			}
+		}
+	}
+
+	jQuery.each( {
+		"data/name.html": true,
+		"data/someFileThatDoesNotExist.html": false
+	} , function( uri , isSuccess ) {
+
+		jQuery.ajax( url( uri ) , {
+			statusCode: createStatusCodes( "in options" , isSuccess ),
+			complete: countComplete
+		});
+
+		jQuery.ajax( url( uri ) , {
+			complete: countComplete
+		}).statusCode( createStatusCodes( "immediately with method" , isSuccess ) );
+
+		jQuery.ajax( url( uri ) , {
+			complete: function(jXHR) {
+				jXHR.statusCode( createStatusCodes( "on complete" , isSuccess ) );
+				countComplete();
+			}
+		});
+
+		jQuery.ajax( url( uri ) , {
+			complete: function(jXHR) {
+				setTimeout( function() {
+					jXHR.statusCode( createStatusCodes( "very late binding" , isSuccess ) );
+					countComplete();
+				} , 100 );
+			}
+		});
+
+		jQuery.ajax( url( uri ) , {
+			statusCode: createStatusCodes( "all (options)" , isSuccess ),
+			complete: function(jXHR) {
+				jXHR.statusCode( createStatusCodes( "all (on complete)" , isSuccess ) );
+				setTimeout( function() {
+					jXHR.statusCode( createStatusCodes( "all (very late binding)" , isSuccess ) );
+					countComplete();
+				} , 100 );
+			}
+		}).statusCode( createStatusCodes( "all (immediately with method)" , isSuccess ) );
+
+	});
+
+});
+
 }
 
 //}