


Starting from IE 8, IE has added a compatibility mode. When turned on, it will render with a lower version of IE. But sometimes this will cause problems with the web page, so we usually add the following code in html to make IE use a fixed rendering mode:
But I encountered a situation. In IE8, the page can be displayed normally only if the compatibility mode is not used. However, if it is set to IE8 mode, CSS3 will become invalid in IE9. It seems that I need to disable compatibility mode for IE8 and IE9 respectively. What to do? The browser version can be determined in the background. If it is IE8, content="IE=8" will be output. If it is IE9, content="IE=9" will be output. But this cannot be achieved with html. In fact, you can simply use the following code to achieve it:

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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The article discusses the <iframe> tag's purpose in embedding external content into webpages, its common uses, security risks, and alternatives like object tags and APIs.


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