Simple Easing Functions in Typescript

easing.ts

class Ease {
  static in(t: number, p = 1) {
    return t ** p
  }
  static out(t: number, p = 1) {
    return 1 - Ease.in(1 - t, p)
  }
  static inOut(t: number, p = 1):number {
    if (t <= 0.5) {
      return Ease.in(t * 2, p) / 2
    }
    return 1 - Ease.inOut(1 - t, p)
  }
}

usage.js

Ease.in(t) // linear(t)

Ease.in(t, 2) // easeInQuad(t)

Ease.out(t, 3) // easeOutCubic(t)

Ease.inOut(t, 5) // easeInOutQuint(t)