IE browser F12 downgrade the difference between "browser mode" and "Document Mode"

No more nonsense, get to the point.

One, browser mode

"Browser mode" is used to toggle the default document mode of IE for the webpage, annotate the conditions of different versions of the browser, and send the value of the user agent (User-agent) string to the Web server. Web sites can determine the browser's version and installed functionality based on the different user-agent strings returned by the browser, so that different page content can be returned to different browsers.

Second, document mode

Document mode specifies which version of the page layout engine (Trident) of IE is used to parse and render the page code. Switching the document mode causes the page to be refreshed, but the version number in the user agent string is not changed and the page is not re-downloaded from the server. When you switch browser mode, the browser automatically switches to the appropriate document mode.

Note:

1. The document mode is equivalent to the true tune browser kernel
2. Browser mode is equivalent to the default style of the version browser

IE browser F12 downgrade the difference between "browser mode" and "Document Mode"