What is ajax async

The full name of AJAX is Asynchronous JavaScript and XML (asynchronous JavaScript and XML). Ajax is not a new programming language, but a new way of using existing standards.

#ajax is a technology that can update parts of a web page without reloading the entire web page.

ajax is a technology used to create fast dynamic web pages. By exchanging small amounts of data with the server in the background. Ajax allows web pages to be updated asynchronously. This means that parts of a web page can be updated without reloading the entire page. If traditional web pages (which do not use ajax) need to update content, the entire web page must be reloaded.

Advantages of ajax:

1. The biggest point is that the page does not refresh, and the user experience is very good.

　2. Use asynchronous mode to communicate with the server, with faster response capability.

　3. You can transfer some of the work previously burdened by the server to the client, using the client's idle capabilities to process it, reducing the burden on the server and bandwidth, and saving space and broadband rental costs. And to reduce the burden on the server, the principle of ajax is to "fetch data on demand", which can minimize the burden on the server caused by redundant requests and responses.

4. Based on standardized and widely supported technology, there is no need to download plug-ins or small programs.

　5. Ajax can make Internet applications smaller, faster, and more user-friendly.

Disadvantages of ajax:

1. Ajax does not support the browser back button.

　2. Security issues AJAX exposes the details of interaction with the server.

　3. The support for search engines is relatively weak.

　4. Destroyed the exception mechanism of the program.

5. Not easy to debug.

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