Internet Explorer Compatibility

Document Compatibility determines how Internet Explorer 9 interprets and displays your webpages and determines the features supported by your pages. Learn how to enable support for current and emerging web standards, as well as how (and when) to limit your webpages to support older versions of Internet Explorer.

Learn the best practices for ensuring your code works reliably across different browsers and different versions of the same browser.

The Internet Explorer 9 Cookbook includes information about changes to features, identifies features that are deprecated or removed, and describes general tools and guidance.

Learn how Internet Explorer 9 makes it easy to keep your site working from day 1, while you update your site for HTML5! 

Internet Explorer 9 sends a new, shorter user agent string than has a new user agent string by default, learn about the different parts of the user agent string, and how to use it to determine what browser your visitors are using.