jquery-deferred

An example to make clear what i want to do. This is what I would usually do: function success(data, status, jqxhr){ if ( data.error ) return failure(jqxhr, status, data.error); // process data } function failure(jqxhr, status, err){ ... } $.ajax( ... ) .done(success) .fail(failure) Is there any way, i can accomplish this with anonymous functions only, like so? $.ajax( ... ) .done(function(data, status, jqxhr){ if(data.error) // what do i need to do here to jump in to the fail handler? }) .fail(function(jqxhr, status, err){ ... }) what do i need to do here to jump in to the fail handler? Don't

Given these functions: function func1() { var dfd = $.Deferred(); setTimeout(function() { dfd.resolve('Password'); }, 1000); return dfd.promise(); } function func2(message) { var dfd = $.Deferred(); setTimeout(function() { if (message == 'Password') { dfd.resolve('Hello World'); } }, 1000); return dfd.promise(); } I'd like to find a better way to do the following. Note this is using jQuery 1.8.x. var promise = func1(); promise.done(function(message1) { var promise2 = func2(message1); promise2.done(function(message2) { alert(message2); }); }); Any ideas? I thought using jQuery #pipe or #then

I have a function that does something like this: function do_something() { // some code return $.when(foo, bar, baz).then(do_something_else); } function do_something_else(_foo, _bar, _baz) { // do something else return /* the original inputs */; } So, when someone uses do_something , they can also chain more callbacks, like: do_something().then(function(_foo_2, _bar_2, _baz_2) { console.log(_foo_2, _bar_2, _baz_2); }); The problem is that I don't know how to bypass the original return from do_something_else to the anonymous function described. I don't want to receive a list, but positional

If I have a function that sometimes returns a deferred object but sometimes a non-deferred object. How can I tell which one it is? Depending on your use case, you could also use jQuery.when [1]: If a single argument is passed to jQuery.when and it is not a Deferred, it will be treated as a resolved Deferred and any doneCallbacks attached will be executed immediately. With jQuery.when you can treat your mysterious object always as deferred: // x could be a deferred object or an immediate result var x = getMysteriousObject(); // success will be called when x is a deferred object and has been