Beautiful Javascript

What's the most well written javascript you've ever seen?

 for me, its the d3 source code. All the design decisions are deeply thought out, resulting in a powerful declarative syntax thats easy to use, yet still scales to the most complex applications. I am devoting the next few years of my life to its study.

>>7
It's one of those ``considered harmful'' practices. Try it on a DOM structure and you'll see what I mean. Javascript is shit.