Is synchronous execution guaranteed by an ajax callback function?

Consider the following scenario:

ajaxCall() {
    $.ajax({
      ...
      ...
      success: function(response) {
        event2();
      }
    });
}

If we have a sequence of calls like this:

event1();
ajaxCall();
event3();

Can we be certain that events will always execute in the order of event1(), event2(), and event3() without setting the async flag?

Answer №1

When it comes to AJAX, remember that it's all about being Asynchronous JAX! That's the key.

If you find yourself needing a synchronous call, just remember to add the async: false flag. However, keep in mind that this will prevent the success callback from being executed and you'll have to manually insert the event2(); line right after the $.ajax call.

For more information, check out Mike C's answer. It's worth noting that synchronous calls are now considered deprecated.

Answer №2

Generally speaking, it is best to set async to false. However, it is important to note that synchronous AJAX requests have been deprecated and even jQuery has officially stopped supporting it after version 1.8.

It is advisable to steer clear of using synchronous AJAX requests for better compatibility and performance.

Answer №3

Not a chance.

When the triggering event (such as the HTTP response) occurs, the callback function will be activated.

Even if you call a function right after assigning the callback, it will still be executed immediately.

The sequence of operations remains unchanged:

event1();
makeAjaxRequest();
    $.ajax();
event3();
handleSuccess();
    event2();

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