What is ajax call

AJAX calls have a wide range of applications but are particularly useful for websites who have a large amount of personal information which can prevent full HTML document caching. Ecommerce websites are among those that can use AJAX calls to load cart contents, account information, and product recommendations without embedding that information direclty into the HTML of a page.

At Section we regularly use AJAX calls combined with Varnish Cache to allow for the caching of dynamic content without sharing personalized information between users. As a basic example you could configure a page counter that changed each time a page is reloaded by programming a snippet that is loaded after the main content:. Because this is called following the rest of the page, you can cache the entire HTML document of the page without worrying that the dynamic content will be broken.

AJAX calls are beneficial for several reasons. You can find more information on setting up your own AJAX calls here. Another method of adding personalized information to a page without loading it directly in the HTML document is by using Edge Side Includes.

Asked 11 years, 9 months ago. Active 6 months ago. Viewed 64k times. Improve this question. ASR4 1 1 gold badge 4 4 silver badges 16 16 bronze badges. Should have a look at the wiki article. The request headers should contain this key value pair: x-requested-with : xmlHttpRequest — Armin Torkashvand. Add a comment. Active Oldest Votes.

Improve this answer. Good example and explanation! But the server typically can't distinguish between an Ajax request or a page transition - most Ajax requests are sent with the header X-Requested-With: XMLHttpRequest so the server can make an assumption that it is an Ajax request based on that header — BornToCode.

Stephen C Stephen C k 90 90 gold badges silver badges bronze badges. I suggest you look it up on Wikipedia or some other place. Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Does ES6 make JavaScript frameworks obsolete?

Podcast Do polyglots have an edge when it comes to mastering programming Featured on Meta. Visit jQuery documentation to know more about ajax method. C ASP. Skill Tests ASP. Options Description accepts The content type sent in the request header that tells the server what kind of response it will accept in return.

Set it false to make it synchronous. Default is true. It can be JSON object, string or array. This is done by checking the Last-Modified header. Default value is false. Default is GET. Example: jQuery Ajax Request. Try it.