What is Ajax?

The full name of Ajax is asynchronous JavaScript and XML (asynchronous JavaScript and XML).

Ajax is not a new programming language, but a new method of using existing standards. Ajax is the art of exchanging data with a server and updating parts of a Web page without reloading the entire page.

Ajax is a technique that can update parts of a Web page without reloading the entire page.

Ajax is a technique for creating fast, Dynamic Web pages. A small amount of data exchange with the server in the background. Ajax makes it possible for Web pages to be updated asynchronously. This means that you can update a part of a webpage without reloading the entire page. While traditional Web pages (without Ajax) need to be updated, the entire page face must be overloaded.

Ajax applications use a Web browser that supports the above technologies as a running platform. These browsers currently include: Mozilla, Firefox, Internet Explorer, Opera, Konqueror, and Safari. However, Opera does not support XSL format objects, nor does it support XSLT.

The Ajax outlook is very optimistic and can improve system performance and optimize the user interface. Ajax existing Direct frame Ajaxpro, can introduce Ajaxpro.2.dll file, can directly in the foreground page JS call back Page method. However, this framework is in conflict with the form validation. Microsoft also introduced the Ajax build, need to add the AjaxControlToolkit.dll file, you can appear in the control list of related controls.

Advantages of Ajax:

1, the biggest point is that the page does not refresh, the user experience is very good.
2, the use of asynchronous way to communicate with the server, with more rapid response capability.
3, can transfer the work of some previous server to the client, take advantage of the client idle ability to handle, reduce the burden of server and bandwidth, save space and broadband rental cost. and reduce the burden on the server, the principle of Ajax is "on-demand data", can minimize redundancy requests, and response to the burden on the server.
4, based on standardized and widely supported technology, do not need to download plug-ins or small programs.
5. Ajax can make Internet applications smaller, faster, and more friendly.

Disadvantages of Ajax:

1, Ajax does not support the browser back button.
2. Security issues Ajax exposes the details of interacting with the server.
3, the support of the search engine is weaker.
4. The abnormal mechanism of the program is destroyed.
5, not easy to debug.

　

What is Ajax?