IE Compatibility Mode_html/css_WEB-ITnose

Every time I receive a call or PM and say to me: "Why does that xxx version disappear?" or: "Why does that xxx page link (Ajax link) click to go to the page? Show pictures and text but other parts are missing"?

Usually I ask two questions: Do you use IE? What is your IE version?

Generally speaking, the other party uses IE, and if it is IE7, I can only mentally shout: "Oh my god, please, can you upgrade or change the browser?" and then use a polite tone. Communicate with each other ideally. If it can't be replaced, then I can only remove some relatively new technologies, such as Ajax, CSS3, etc.

However, sometimes I encounter that the other party is using a relatively new IE, IE8 or above, but there will be problems when the other party uses the website. For example, when clicking the ajax connection, the Ajax content will be displayed directly instead of updating to the page. A certain position, or the entire Css is gone, or the page is even empty because the browser cannot understand a certain JS Framework. This actually gave me a headache for a while, because the same IE on my computer obviously doesn’t work?

Later I finally found a solution and finally figured out what was going on. It turned out to be IE's "Compatibility View". (If you are not interested in the following content or urgently need to know the answer, please Scroll directly to the end)

and IE compatibility mode

Before IE8, IE was still relatively dominant. At that time, it had many things related to the Internet. Standard is different. For example, he only knows how to customize tags. At that time, many websites were written with IE as the target browser.

Over time. Progress, Microsoft realized that it is not enough to develop its own version, it needs to be the same as Web Standard. Slowly, the old things that only belonged to IE are no longer in the new IE.

But for the sake of the past. What should we do with websites designed for browsers? They are in a very embarrassing situation, because if they do not support many old websites, in addition to running the version, some functions will have problems.

In order to solve this problem, Microsoft has sincerely added the so-called compatibility mode after IE8, which means that you can use compatibility mode to browse old websites and everything will be normal, and use normal mode to browse newer websites.

Sounds great, the old website in question uses IE compatibility mode, and the new website uses normal mode, but there is a prerequisite for this, that is, users must know the meaning of compatibility mode and how to switch it

How compatibility mode becomes a problem

Suppose I use compatibility mode to browse a relatively new website today, and I will find that there are many problems. First of all, many Jquery things will be weird, like Ajax. It won’t work, or some JS UI Framework is completely broken.

Then you might say, wouldn’t it be better to turn on compatibility mode? But the problem is that many users don’t know this. And he may not understand it when you introduce it to him. The biggest problem is that compatibility mode can be set to be always on

In some companies, compatibility mode is turned on by default. , which means that they browse many web pages in that state, and users may not know how to turn it off

Microsoft’s solution

Microsoft has mentioned it in this article. Regarding how to solve the compatibility issue, he said that the docType must be set first. If not set, it will be browsed in Quirks mode (IE5).

But the problem is if the user sets the docType. Mode browsing, even if there is a docType, it will browse in compatibility mode, so what should I do?

Microsoft therefore said that we can add a metatag to inform the IE version to be used, and this can also be used to force not to use compatibility? Pattern browsing.

That "IE=Edge" means using the latest normal mode of IE Browse. Of course, you can also specify which version of IE you want to use to browse.

Add Chrome=1

When I searched on the Internet, I found that some people would add Chrome=1 at the end, which becomes:

I searched out out of curiosity and found that someone had asked the same question on StackOverflow, only to find out that Chrome has an IE Add on called Chrome Frame, and its function is to use Chrome to display pages in IE, so that the old IE can browse some new pages without problems, and the Chrome=1 means that if it is installed, Just enable it.