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How to clear cache in html

醉折花枝作酒筹

Apr 12, 2021 pm 05:47 PM

html clear cache

htmlHow to clear the cache: 1. Use the "Cache-Control" attribute in the meta tag with the syntax "CONTENT="no-cache""; 2. Add a random parameter after the opened url, Syntax "webpage address=random()".

How to clear cache in html

The operating environment of this tutorial: Windows7 system, CSS3&&HTML5 version, Dell G3 computer.

(1) Use HTML tags to set HTTP header information

<HEAD>
<META    HTTP-EQUIV="Pragma" CONTENT="no-cache">
<META    HTTP-EQUIV="Cache-Control" CONTENT="no-cache">
<META    HTTP-EQUIV="Expires" CONTENT="0">
</HEAD>

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Description: HTTP header information "Expires" and "Cache-Control" provide a control browser and proxy server for the application server caching mechanism. The HTTP header Expires tells the proxy server when its cached page will expire. The newly defined header information Cache-Control in the HTTP1.1 specification can inform the browser not to cache any pages. When the back button is clicked, the browser revisits the server to obtain the page. The following is the basic method of using Cache-Control:

　1) no-cache: Force the cache to obtain new pages from the server

　2) no-store: The cache is not saved in any environment Any page

The Pragma:no-cache in the HTTP1.0 specification is equivalent to the Cache-Control:no-cache in the HTTP1.1 specification and can also be included in the header information.

(2) Add a random parameter after the url that needs to be opened:

Before adding parameters: url=test/test.jsp

After adding parameters: url= test/test.jsp?ranparam=random()

Note: Because the parameters behind the URL of each request are different, it is equivalent to requesting a different page. Use this method to clear the cache

Recommended learning: html video tutorial

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