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Editor to share with you how to learn Ajax, I believe that most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's learn about it!

The code is as follows:

/ / step 1: create a XMLHttpRequest object

Var http_request

Try

{

Http_request = window.ActiveXObject ("Microsoft.XMLHTTP")

} catch (e)

{

Try

{

Http_request = new XMLHttpRequest ()

} catch (e)

{

Alert ("your browser does not support XMLHttpRequest")

}

}

/ / step 2: specify the submitted url

Http_request.open ("get", "url", "true"); / / get is the submission method, and true is to specify asynchronous interaction with the server.

/ / step 3: process the data returned by the server

Http_request.onreadystatechange = function () / / callback function, which will be called 4 times in total. The readtState changes from 0-> 1-> 2-> 3-> 4 (completed).

{

If (http_request.readyState = = 4) / / Server processing completed

{

If (http_request.status = = 200) / / client processing completed

{

/ / processing segment

}

}

}

/ / step 4: send parameters

Http_request.send (null); / / send parameters

The above is all the contents of the article "how to learn Ajax". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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