Sass-like tool for JavaScript (Windows)

I don’t need anything amazing, and Sass is amazing for CSS, but I’m curious what people are using for JavaScript on a Windows computer. I’d like to be able to combine JS files and have options to minify. Like Sass, I’d want it to watch the files and update whenever I make a change. Is there such a thing? I really don’t want to use Cygwin or anything complicated. Thanks for any recommendations.

You’re probably looking for Grunt.js

Thanks. I’ve installed node and grunt, but don’t have time to play right now. Sounds like it has a lot of options.

Here’s a tutorial:

Wow, grunt is fantastic. It’s doing everything I wanted. Thanks to all!!!