Enhancement: Allow the ability to define things like translate with a function.

[andremalkine]

This would allow the animator to do things such as take measurements at the point in time when an animation actually takes place. Example:

element1.animate({
  translate: function() {
    return [ 0, element2.state.translate[1], 0 ];
  },
  duration: 1000,
  delay: 3000
});

[lvivski]

Do you expect this function to be called on each frame calculation? I can see that to be useful when you want to calculate next state based on previous state. It would require some major refactoring, but can definitely be implemented.

There are some major changes coming soon, like animating arbitrary CSS properties (incl. color, background-color, etc) and more.

[andremalkine]

I suppose I was not thinking that it would be called on every loop, which would cause element1 to "track" element2. I was thinking only about the moment in which a given animation starts, after it's delay is complete but before it's duration begins, so it could set a "target" based on the current state of the world at that time.

It's possible I'm thinking too abstractly about this, as timelines are pretty complex I'm guessing.

Glad to hear about the enhancements!