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Editor to share with you what matters needing attention in ajaxError () in JavaScript. I hope you will get something after reading this article. Let's discuss it together.

No matter which Ajax request is completed, all ajaxError processors will be executed. If we have to distinguish between different requests, we can pass the parameters to this processor. It passes the event object, the jqXHR object (before jQuery 1.5 is the XHR object), and the setting (settings) object used to create the request each time the ajaxError handler executes the request through the request used in the event object, the XMLHttpRequest object, and the setting object. If the request fails, because JavaScript throws an exception and the exception object as the fourth parameter is passed to the handler. For example, we can limit our callback to only handle events and handle a particular URL:

$(document) .ajaxError (function (event, jqxhr, settings, exception) {

If (settings.url = = "ajax/missing.html") {

("div.log") .text ("Triggered ajaxError handler.")

}

})

Other considerations:

If the global option is set to false, calling the $.ajax () or $.ajaxError () method will not be triggered.

Example:

Displays a message when the Ajax request fails.

$(document) .ajaxError (function (event, request, settings) {

$("# msg") .append ("Error requesting page" + settings.url + "")

})

After reading this article, I believe you have a certain understanding of "what are the precautions of ajaxError () in JavaScript". If you want to know more about it, you are welcome to follow the industry information channel. Thank you for your reading!

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