jQuery.ajax() method's async option deprecated, what now?

Question

As of jQuery 1.8, the use of async:false in jQuery.ajax() is deprecated.
But how many webpages have you seen with a "loading screen" while there is an ongoing AJAX communication in the background? I have probably seen thousands of them.

My case is that I am writing a mobile app that needs to load a language file. And at the beginning I load the language file and I retrieve the text of the buttons and other GUI elements from the language file.

This is really bad for me. Because if the language file is missing, the GUI shouldn't appear. So how do I solve it? Put all my code in the success callback? That doesn´t seem like a good coding practice to me. Can I solve it another way?

Answer 1

The solution is to manually add an overlay to prevent the user to interact with the interface, and then remove it once the AJAX query is done.

$(function() {
    show_overlay();        

    $.ajax({
        // Query to server
    }).done(function() {
        // Verify good data
        // Do stuff
        remove_overlay();
    });
});