forAnime (spring: SpringParameters) : SpringParameters
The spring rewritten for anime.js, which clamps mass to at least 1.
A mass below 1 is rescaled to mass 1 by dividing stiffness and damping by it, which keeps the natural frequency and damping ratio, so the motion is unchanged.
linear (spring: SpringParameters) : string
The spring as a CSS `linear()` easing of 32 samples over its settling time.
Each sample is rounded to 3 decimals. The first is `0` and the last is `1`.
position (spring: SpringParameters) (seconds: float) : float
The position of the spring after `seconds`, from 0 at rest to 1 at the target.
This is anime.js's `solve(t)`, which is itself `1 - displacement`; a spring that overshoots exceeds 1.
preset (name: string) : SpringParameters option
The stand-in spring for one of Figma's named spring presets, or `None` for any other name.
Figma does not publish the parameters of `GENTLE`, `QUICK`, `BOUNCY` and `SLOW`; this is the one place that chooses them.
settle (spring: SpringParameters) : int
The milliseconds a spring takes to settle.
This is `round(solverDuration * 1000)`, anime.js's `settlingDuration`.
solverDuration (spring: SpringParameters) : float
The seconds the solver runs before the spring has rested, as anime.js measures it.
It steps 0.02s at a time and stops on the 11th consecutive step within 0.0005 of the target.