What is the best way to ensure blocking on an AJAX call?

When it comes to Ajax, callbacks are used due to its asynchronous nature.

I desire my request to the remote URL to wait until a response is received, akin to how Ajax operates, but without the asynchrony. In other words, I seek to create a JAX call.

Is there a method to achieve this (utilizing JQuery) (... offering a solution using JQuery or another approach):

function get_data() {
    $.ajax({
        type : "POST",
        url : "/foo"
    }).done(function(data, textStatus, jqXHR) {
        return data;
    }).fail(function(jqXHR, textStatus) {
        return null;
    });
}

var data = get_data();
// process `data`

This question stems from a place of curiosity and eagerness to expand knowledge.

Sometimes, waiting for a reply before proceeding makes sense. I don't mean to halt the browser, just the script's runtime.

Answer №1

When working with jQuery, you have the option to set the async : false boolean. However, keep in mind that as of jQuery 1.8, this method is deprecated and you should use the complete/success/error callbacks instead (refer to the documentation).

If you prefer not to use jQuery or want to delve deeper into the inner workings, you can learn more by reading this resource: click here.

xmlhttp.open("GET","ajax_info.txt",false);
xmlhttp.send();
document.getElementById("myDiv").innerHTML=xmlhttp.responseText;

It's worth questioning why you would opt for a synchronous operation over an asynchronous one...

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