Browser Detection with MS Ajax libraries

Friday, July 10, 2009

AJAX ASP.NET Javascript Webforms Browser Detection

Most web developers use the navigator.userAgent to determine which browser is currently running your script. I've also seen this

var IE = document.all ? true : false;

But there is an library in the MS Ajax libraries for this...

HEY PRESTO ----> Sys.Browser

An example of this...

if (Sys.Browser.agent != Sys.Browser.InternetExplorer) { //let's do something because we're not IE }

Hope that helps someone!

Enjoy.

4 Comments

Undocumented? :)
http://msdn.microsoft.com/en-us/library/cc679064.aspx

InfinitiesLoop - Friday, July 10, 2009 7:00:32 AM

Good spotting InfinitiesLoop !

But I have to say that my local MSDN library has absolutely nothing about Sys.Browser.....

In the end, I hope that this little discovery is useful.

johnbilliris - Friday, July 10, 2009 7:29:06 AM

If u provide one button with functionality of displaying the name of browser,then it will look good.

Subbareddi - Friday, July 10, 2009 12:27:27 PM

Did anyone tell you that using undocumented calls is probably a bad idea? :)

Ryan - Saturday, July 11, 2009 5:50:09 AM

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