Handle Ajax errors in javascript and javascriptajax errors

Handle Ajax errors in javascript and javascriptajax errors

Pay attention to two types of errors when using Ajax. Their differences come from different perspectives.

The first type of error occurs from the perspective of the XMLHttpRequest object: Some factors prevent requests from being sent to the server. For example, the DNS cannot resolve the host name, the connection request is rejected, or the URL is invalid.

The second type of errors is from the application perspective: They occur when requests are successfully sent to the server, and the Server accepts requests for processing and generates responses, but this does not point to what you expect. For example, if the requested URL does not exist, such problems will occur.

There are three ways to handle these errors, as shown in the following code:

<! DOCTYPE html> 




 
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