What caching mechanisms does Ajax have?

This article mainly introduces "what caching mechanisms does Ajax have". In daily operation, I believe many people have doubts about what caching mechanisms Ajax has. The editor consulted all kinds of materials and sorted out simple and easy-to-use operation methods. I hope it will be helpful for you to answer the doubts about "what caching mechanisms Ajax has". Next, please follow the editor to study!

The caching mechanism of Ajax is the same as that of browsers when dealing with resources.

Three simple rules:

Whenever it is a GET request with the same URL, the browser uses caching (depending on the setting of the server's Cache-Control/Expires/Last-Modified/ETag header, of course).

As long as it is a POST request, the browser will not cache.

Https requests are not cached by browsers (in most cases, but there are exceptions, and FF browsers are said to be the exception).

Add:

Putting in a random query string in URL can make the browser think this is a new request without using caching.

Set the http header: If-Modified-Since:0 in the Ajax request to tell the server to ask for new content.

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