Should I learn/become proficient in Javascript?

Question

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

Answer 1

If you're involved with the Web in anyway then the answer is "Yes, always". Maybe an embedded or system's programmer could get by without JavaScript, but not a webdev.

Most of the libraries are designed to alleviate some of the pain of interacting with a multitude of browsers. They will not abstract away core JavaScript functionality.