How to block on asynchronous functions in JavaScript

Question

I need to write a function in JavaScript, which returns a state from calling an asynchronous function. However, the caller only receives the value and no callback function i

Answer 1

Unless I misunderstood your question, you could look at jQuery's ajaxStop() event - http://api.jquery.com/ajaxstop. This blocks until all ajax calls have completed. This obviously requires that all of your async calls be done thru jQuery.

$(document).ajaxStop(function() {
    // do your "ajax dependent" stuff here
});