Detect IE version (prior to v9) in JavaScript

Question

I want to bounce users of our web site to an error page if they\'re using a version of Internet Explorer prior to v9. It\'s just not worth our time and money to

Answer 1

The most comprehensive JS script I found to check for versions of IE is http://www.pinlady.net/PluginDetect/IE/. The entire library is at http://www.pinlady.net/PluginDetect/Browsers/.

With IE10, conditional statements are no longer supported.

With IE11, the user agent no longer contains MSIE. Also, using the user agent is not reliable because that can be modified.

Using the PluginDetect JS script, you can detect for IE and detect the exact versions by using very specific and well-crafted code that targets specific IE versions. This is very useful when you care exactly what version of browser you are working with.