Please improve the documentation.

[orj]

There is no documentation in the code. And the README is pretty lean.

It's hard to know what values to provide to the properties of the spring. Ie, what are the units of the values. Eg, how should I be determining velocity for the spring?

[kostiadombrovsky]

+1

[housseynCheriet]

Best explanation of easing function
https://www.selectionjs.com/animation