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This article is about what the four letters in ajax mean. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

The four letters of ajax are Asynchronous, Javascript, And and XML, which refers to a set of browser-side web page development technology that integrates a number of technologies.

This article operating environment: Windows7 system, javascript1.8.5&&html5 version, Dell G3 computer.

The four letters of ajax are: Asynchronous Javascript And XML.

AJAX, namely "Asynchronous JavaScript and XML" (asynchronous JavaScript and XML technology), refers to a set of browser-side web page development technology that integrates many technologies. The concept of Ajax was proposed by Jesse James Jarrett.

Traditional Web applications allow the client to fill out a form (form) and send a request to the web server when the form is submitted. The server receives and processes the incoming form and sends it back to a new web page, but this wastes a lot of bandwidth because most of the HTML code is often the same on both pages. Because each application communication needs to send a request to the server, the response time of the application depends on the response time of the server. This causes the user interface to respond much more slowly than native applications.

In contrast, the AJAX application can only send and retrieve the necessary data to the server, and process the response from the server using JavaScript on the client. The server responds faster because there is a significant reduction in the amount of data exchanged between the server and the browser.

At the same time, a lot of processing can be done on the client machine that made the request, so the load on the Web server is reduced.

Similar to DHTML or LAMP,AJAX does not refer to a single technology, but the organic use of a series of related technologies. Although its name contains XML, the data format can actually be replaced by JSON to further reduce the amount of data. The client and server do not need to be asynchronous. Some AJAX-based "derived / composite" (derivative/composite) technologies are also emerging, such as AFLAX.

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