jQuery .done not firing on a $.post request

Question

Firstly, here's my example code:

$.post( "test.php", { testdata : "signal" },
            function( data ) { alert( "Nested function" )})
 .done( function () { alert( "Done function" )});

I'm trying to get .done to accomplish some stuff for me, it doesn't matter what. It won't fire, regardless of whether or not I nest a function directly in the $.post parameters. Checking the console on Chrome shows that it's throwing an error of Uncaught TypeError: undefined is not a function

Playing around with lines and the error report shows me that it's definitely the .done that's throwing the error, and that simply moving the .done to directly after $.post 's close paren isn't effective.

There is another similar question that I saw, but it was for $.ajax, and I've attempted to implement the chaining they suggest, as above, to no effect. What am I missing?

EDIT: jQuery version is 1.4.4, the .post successfully returns data, and .always also fails.

Answer 1

Use .complete instead:

$.post("test.php", { testdata : "signal" }, function () { 
        alert("Nested function"); })
    .complete(function () { alert("Done function"); });

fiddle

Answer 2

So, after investigation, and thanks to the comments of Jonathan Lonowski, algorhythm and War10ck, I've discovered the solution.

The version of jQuery I was running, 1.4.4, does not support the .done, .fail, .always, or .complete* methods. To fire an event after a success, I need to follow the inline format of:

$.post( url [, data ] [, success ] [, dataType ] )

...inserting the function that would normally go into .done , after the url. This is what I was doing with the nested function in my original example, just requiring me to remove the .done function.

Thanks all.

* .complete is also deprecated in more recent builds of jQuery. Don't ever use it.