Introduction to Ajax and the principle of validating code generation

What is Ajax

AJAX: "Asynchronous JavaScript and XML"

Asynchronous JavaScript and XML

A web development technology that creates interactive Web applications.

Not a single technology, but an organic use of a range of related technologies:

Simple to understand: JavaScript + XMLHttpRequest + CSS + server-side collection

Normal Web page request receipt process (Request response Mode sync mode)

Ajax Web page application asynchronous request receipt process: By comparing with the normal mode, it feels like Ajax, like a dedicated person to do one by one things, do not affect each other.

Ajax Benefits

Ajax is essentially a browser-side technology

The main purpose of Ajax technology is to partially exchange data between client and server

The main feature of this technique, XMLHttpRequest, is the ability to update data without having to reload the entire page, which is called the Refresh without Reload (light refresh)

Communication with the server is carried out entirely through JavaScript