Choreographer-js

A new animation library by Christine Cha:

A simple library to take care of complex CSS animations.

You define the animations through its JavaScript API and execute them via DOM events, then the animation is done through applying inline CSS.

Seems to me it's not so much for helping build complex CSS animations, but for doing animations through CSS that you can't otherwise do, because you can't get things like mouse or scroll position in CSS.

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Choreographer-js is a post from CSS-Tricks