Should I learn/become proficient in Javascript?

Posted by Nathan Koop on Stack Overflow See other posts from Stack Overflow or by Nathan Koop
Published on 2008-09-22T13:18:52Z Indexed on 2010/04/25 0:43 UTC
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I am a .NET webdev using ASP.NET, C# etc... I "learned" javascript in college 5+ years ago and can do basic jobs with it. But I wonder if it is useful to become proficient in it.

Why should I learn Javascript? Is it more advantageous then learning JQuery or a different library?

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