Keywords: meta; http-equiv; map; table; form; character entity
HTML basics
tag
meta tag describes some basic metadata.
2 3 4 5 6 78 | Define keywords for search engines: |
http-equiv attribute
1 | http-equiv顾名思义,相当于http的文件头作用,它可以向浏览器传回一些有用的信息,以帮助正确和精确地显示网 |
1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 2021 22 23 24 25 26 27 28 29 3031 32 33 34 35 36 37 | td> | http-equiv, as the name suggests, is equivalent to the file header of http. It can return some useful information to the browser to help display the web content correctly and accurately. The syntax format of the http-equiv attribute of the meta tag is: ; The http-equiv attribute mainly has the following parameters : A. Expires (period) Description: Can be used to set the expiration time of the web page. Once a web page expires, it must be retransmitted to the server. Usage: Note: The GMT time format must be used. B. Pragma (cache mode) Description: Prohibit the browser from accessing page content from the cache of the local computer. Usage: Note: With this setting, visitors will not be able to browse offline. C. Refresh Description: Automatically refresh and go to a new page. Usage: ; Note: The 2 refers to automatically refreshing to the URL after staying for 2 seconds. D. Set-Cookie (cookie setting) Note: If the web page expires, the saved cookies will be deleted. Usage:Note: GMT time format must be used. E. Window-target (setting of display window) Description: Force the page to be displayed as an independent page in the current window. Usage: Note: Used to prevent others from calling your own page in the frame. F. content-Type (display character set setting) Description: Set the character set used by the page. Usage: G, content-Language (display language setting ) Usage: |

The official account web page update cache, this thing is simple and simple, and it is complicated enough to drink a pot of it. You worked hard to update the official account article, but the user still opened the old version. Who can bear the taste? In this article, let’s take a look at the twists and turns behind this and how to solve this problem gracefully. After reading it, you can easily deal with various caching problems, allowing your users to always experience the freshest content. Let’s talk about the basics first. To put it bluntly, in order to improve access speed, the browser or server stores some static resources (such as pictures, CSS, JS) or page content. Next time you access it, you can directly retrieve it from the cache without having to download it again, and it is naturally fast. But this thing is also a double-edged sword. The new version is online,

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