Tips for disabling compatible view modes of IE8 and IE9 using HTML_HTML/Xhtml_Webpage Production

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:

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The code is as follows:

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:

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The code is as follows: