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Zach Leatherman

jQuery Bug: IE reports incorrect $.browser.version

19 Oct 2008 Zach Leatherman 1 min read

Warning

This article is old and may contain information that is outdated, irrelevant, or—dare I say it—no longer accurate. Read with care!

Update: This is now fixed in jQuery.

I’ve witnessed installations of IE where the navigator.userAgent reported both MSIE 6.0 and MSIE 7.0 in the same string, when Internet Explorer 7 is the one that’s really installed. Turns out, this is problematic for jQuery version 1.2.6, as it parses the double version userAgent as Internet Explorer 6, which may cause problems with your code if you’re using $.browser.version.

You can monitor the jQuery bug in the bug tracker, or see the original research performed by Jamie Thompson. Here’s a better workaround that merges two different approaches used on Jamie’s page, which fixes $.browser.version instead of using $.browser.msie6. This is to be considered temporary until the next (fixed) version of jQuery comes out.

jQuery.browser.version = jQuery.browser.msie && /msie 7\.0/i.test(navigator.userAgent) ?
  "7.0" :
  jQuery.browser.version;

3 Comments

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Very useful, thanks for sharing.

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