# Ajax (programming) | | Ajax (also AJAX ; short for "Asynchronous JavaScript and XML" or "Asynchronous JavaScript transfer is a set of web development techniques that uses various web technologies on the client-side to create asynchronous web applications. With Ajax, web applications can send and retrieve data from a server asynchronously without interfering with the display and behaviour of the existing page. By decoupling the data interchange layer from the presentation layer, Ajax allows web pages and, by extension, web applications, to change content dynamically without the need to reload the entire page. In practice, modern implementations commonly utilize JSON instead of XML. | |-|-| | | wikipedia:: [Ajax (programming)](https://en.wikipedia.org/wiki/Ajax_(programming)) | [[Web APIs & services]], [[Data Transport, Serialization Formats & Configuration Files]], [[Fetch]], [[axios]] [Ajax (programming) - Wikipedia](https://en.wikipedia.org/wiki/Ajax_(programming)) - “Asynchronous Javascript And XML” but mostly now with JSON instead of XML which would technically be ASJJ - A variety of popular JavaScript libraries, including JQuery, include abstractions to assist in executing Ajax requests. - Mostly client-side - Usually targeting some container to do something to it. - Can call to your own server or a third party server via an API e.g. ## AHAH - http://microformats.org/wiki/rest/ahah - Asynchronous HTML and HTTP (AHAH) involves using XMLHTTPRequest to retrieve (X)HTML fragments, which are then inserted directly into the Web page. ## Asynchronous - Allows a webpage to be updated/changed without the browser needing to reload the entire page ## [[XMLHttpRequest]] ## [[jQuery]] Ways of doing AJAX - The popular JavaScript library jQuery has implemented abstractions which enable developers to use Ajax more conveniently. Although it still uses XMLHttpRequest behind the scenes - Get Method - jQuery.get - jQuery.ajax