How Can I Cancel jQuery Ajax Requests?

Canceling Ajax Requests with jQuery

jQuery offers a convenient way to cancel Ajax requests before receiving a response. To achieve this, we can leverage the abort() method.

xhr.abort()

jQuery Ajax methods generally return an XMLHttpRequest object (xhr). The xhr object provides an abort() method that allows you to cancel the request.

This method works regardless of whether the request has been sent or is still in progress:

var xhr = $.ajax({
    type: "POST",
    url: "some.php",
    data: "name=John&location=Boston",
});

// Cancel the request
xhr.abort();

jqXHR Object in jQuery 1.5

In jQuery versions 1.5 , the returned object is a wrapper for the native XMLHttpRequest object, known as jqXHR. It still exposes the abort() method, so the above code continues to work.

Promises in jQuery 3

jQuery 3 introduced promises with additional methods, including abort. The above code remains functional, but the returned object is no longer an XMLHttpRequest.

Note: xhr.abort() continues to function in jQuery 3.x. The earlier claim that it doesn't is inaccurate. For more information, refer to the jQuery GitHub repository.

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