Twelve UI easing curves, written out so you can read them

The article lays out 12 common UI easing curves as closed-form formulas that can be implemented consistently in JavaScript, C#, Unity, and other platforms.

It covers stateless, portable curves and explains special handling for overshoot and anticipate variants.

For engines that prefer data over computation, it also shows a lookup-table approach and compares sampled approximations with exact formulas.