Type Alias EasingName

EasingName:
    | "linear"
    | "quadratic-in"
    | "quadratic-out"
    | "quadratic-in-out"
    | "cubic-in"
    | "cubic-out"
    | "cubic-in-out"
    | "quartic-in"
    | "quartic-out"
    | "quartic-in-out"
    | "quintic-in"
    | "quintic-out"
    | "quintic-in-out"
    | "sine-in"
    | "sine-out"
    | "sine-in-out"
    | "exponential-in"
    | "exponential-out"
    | "exponential-in-out"
    | "circular-in"
    | "circular-out"
    | "circular-in-out"
    | "back-in"
    | "back-out"
    | "back-in-out"
    | "bounce-in"
    | "bounce-out"
    | "bounce-in-out"
    | "elastic-in"
    | "elastic-out"
    | "elastic-in-out"
    | "spring-in"
    | "spring-out"
    | "spring-in-out"

Every easing name accepted by resolveEasing, and by the §15 .ease() builder step.

The §15 family names verbatim, each with an -in / -out / -in-out variant; "linear" is bare because its three variants would be identical.