Set compatibility [specify IE browser rendering method]_html/css_WEB-ITnose

The above code tells IE whether the document standard is declared with a DTD or not , IE8/9 will use the IE7 engine to render the page.

The above code tells the IE browser that IE8/9 will use the IE8 engine to render the page.

The above code tells the IE browser that Windows displays content with the highest version of IE.

Determines how to render content based on the directive. Standards mode commands are displayed in Windows Internet Explorer 7 standards mode, while Quirks mode commands are displayed in IE5 mode. Unlike IE7 mode, EmulateIE7 mode follows the directive. It is the preferred compatibility mode for most websites. For those who are using IE9/IE10 and want to skip IE8 and specify rendering in IE7 and IE9, they have to use the syntax recommended by the MSDN document:

However, the above syntax method that is compatible with IE7/IE9 will cause BUG in IE8. It is found that the page is not rendered in IE7's document mode under IE8.
Correct syntax rules:
1. When defining multiple document modes, use commas (,) instead of semicolons (;) mentioned in the document.
Supplement:
X-UA-Compatible is a newly added setting for ie8. It is not recognized by browsers other than ie8. This difference is the same as content="IE=7", regardless of whether the page contains < ;!DOCTYPE> directives all appear to be using the standard mode of Windows Internet Explorer 7. The content="IE=EmulateIE7" mode follows the directive. For most websites, it is the preferred compatibility mode.

X-UA-Compatible is a special file header tag for IE8 version, used to specify different page rendering modes for IE8. Since the current usage rates of IE6 and IE7 are still high, it is very important to enable the X-UA-Compatible compatibility mode of the IE8 version.
The various compatibility mode code examples are as follows:

It seems to be using Windows Internet Explorer 7 Quirks mode, which is similar to how Windows Internet Explorer 5 displays content.

Regardless of whether the page contains the directive, the standard rendering of Windows Internet Explorer 7 is used model.

Enable the standard rendering mode of IE8, but because the X-UA-Compatible file header itself only supports IE8 The above version is therefore equivalent to redundant code.

Edge mode tells Windows Internet Explorer to display content in the highest available mode, which effectively breaks the "lockdown" "model.

EmulateIE7 mode notification Windows Internet Explorer uses the directive to determine how to render content. Standards mode commands are displayed in Windows Internet Explorer 7 standards mode, while Quirks mode commands are displayed in IE5 mode. Unlike IE7 mode, EmulateIE7 mode follows the directive. It is the preferred compatibility mode for most websites.

For more information, please see: http://www.byywee.com/page/M0/S963/963631.html