How to handle Ajax call errors

Ajax stands for "Asynchronous Javascript And XML" (Asynchronous JavaScript and XML), which refers to a web development technology for creating interactive web applications.

Ajax = Asynchronous JavaScript and XML or HTML (a subset of Standard Universal Markup Language).

Ajax is a technology for creating fast, dynamic web pages.

Ajax is a technology that can update parts of a web page without reloading the entire web page.

Ajax allows web pages to be updated asynchronously by exchanging a small amount of data with the server in the background. This means that parts of a web page can be updated without reloading the entire page.

jQuery is a fast and concise JavaScript framework. It is another excellent JavaScript code library (or JavaScript framework) after Prototype. The purpose of jQuery's design is "write less, do more", which means writing less code and doing more things. It encapsulates common JavaScript function codes, provides a simple JavaScript design pattern, and optimizes HTML document operations, event processing, animation design and Ajax interaction.

AJAX call error handling

When an Ajax call returns a 404 or 500 error, the error handler is executed. If no handler is defined, other jQuery code may fail. Define a global Ajax error handler:

$(document).ajaxError(
    function (e, xhr, settings, error) { 
        console.log(error); 
    });

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