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This article mainly shows you "what the ajax engine refers to", the content is easy to understand, clear, hope to help you solve your doubts, the following let the editor lead you to study and learn "what the ajax engine refers to" this article.

Ajax engine is a more complex JavaScript application, which is used to process user requests, read and write servers and change DOM content; Ajax engine can read information and interactively rewrite DOM, which enables web pages to be seamlessly reconstructed.

The operating environment of this tutorial: windows7 system, javascript1.8.5 version, Dell G3 computer.

What is AJAX?

AJAX, whose full name is "Asynchronous JavaScript and XML" (Asynchronous JavaScript and XML), is a web development technology for creating interactive web applications. It uses:

Use XHTML+CSS to standardize rendering

Use XML and XSLT for data exchange and related operations

Asynchronous data communication with Web server using XMLHttpRequest object

Use Javascript to operate Document Object Model for dynamic display and interaction

Use JavaScript to bind and process all data.

What is the ajax engine?

The Ajax engine is actually a more complex JavaScript application that handles user requests, reads and writes servers, and changes DOM content. JavaScript's Ajax engine reads information and interactively rewrites DOM, which enables the page to be seamlessly reconstructed, that is, to change the page content after the page has been downloaded, which is a method that we have been widely used through JavaScript and DOM, but to make the web page really dynamic, we not only need internal interaction, but also need to obtain data from the outside. In the past, we let users enter data and change the content of the page through DOM. But now, XMLHTTPRequest, allows us to read and write data on the server without reloading the page, minimizing user input.

Ajax separates the interface from the application in WEB (it can be said that data and presentation are separated), but in the past, there is no clear boundary between the two. The separation of data and presentation is conducive to division of labor and cooperation, reduce WEB application errors caused by page changes made by non-technical personnel, improve efficiency, and become more suitable for the current publishing system. It can also transfer some of the previous work borne by the server to the client, which is conducive to the idle processing capacity of the client.

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