Ajax Tutorial for Beginners

In this tutorial, we are going to learn about AJAX, it contains the basic overview and introduction to AJAX.

One of the frontend developer's main skills is to write asynchronous code for API consuming. AJAX stands for JavaScript and XML Asynchronous. Binding web apps and structuring them is an approach or definition. When web apps began coming out, for any data to be changed on the DOM, the web page had to be refreshed. AJAX helps us to create web applications that can be modified without refreshing them. This is one of the key features of a single page application, where you can use any frontend system to load data without refreshing the page and produce it in multiple views on the frontend. We'll look at exactly what AJAX is in this Ajax tutorial, how it operates, why it was needed against the traditional web application model, and how to write AJAX requests to consume an API.

DOM (Document Object Model)

To dynamically view and allow the user to interact with the information provided, Javascript accesses the DOM (Document Object Model). Javascript and the XMLHttpRequest object have an asynchronous data exchange method between the browser and the server to prevent complete page reloads.

Basically, we can use Javascript to load other pages inside the currently loaded page, and HTML and CSS can be used to style the information we load. In addition, data that will run on the server can also be PHP. When we load the page, we can actually access all the information from our Javascript, and we can use that Javascript to access our DOM or to modify something or even make it look more interactive on the web page. It may be standard text, JSON, or XML.

Executing Ajax

Basically, the above code demonstrates that the new XMLHttpRequest is Ajax and the Javascript request asks the server to access the new tab. We use ajax.open and ajax. send to execute functions.

If we run this code above, it gives the answer. But that isn't the result we want. We want the user to press a button instead and run Ajax. For eg, if we click a picture on Facebook and a box appears with the picture, comments, likes, and ads on top of everything else. That's Ajaxed, actually. Since it would take a lot of time for the servers to load all of them again, none of the elements were preloaded.