es-easings

Lightweight as possible easing functions exported as commonjs and es modules

These are single-value easing functions. They take in a value representing time as a decimal between 0 and 1 and return a value between 0 and 1.

So for example if my animation duration was 300ms, current time was 100ms, value being animated was from 200 to 600:

const currentTime = 100 / 300
const easeValue = easeInOutQuad(currentTime)
const currentPosition = easeValue * (600 - 200) + 200

Installation

npm install es-easings

Available easing functions

linear swing easeInBack easeInBounce easeInCirc easeInCubic easeInElastic easeInExpo easeInOutBack easeInOutBounce easeInOutCirc easeInOutCubic easeInOutElastic easeInOutExpo easeInOutQuad easeInOutQuart easeInOutQuint easeInOutSine easeInQuad easeInQuart easeInQuint easeInSine easeOutBack easeOutBounce easeOutCirc easeOutCubic easeOutElastic easeOutExpo easeOutQuad easeOutQuart easeOutQuint easeOutSine

Usage

import {
  linear,
  swing,
  easeInBack,
  easeInBounce,
  easeInCirc,
  easeInCubic,
  easeInElastic,
  easeInExpo,
  easeInOutBack,
  easeInOutBounce,
  easeInOutCirc,
  easeInOutCubic,
  easeInOutElastic,
  easeInOutExpo,
  easeInOutQuad,
  easeInOutQuart,
  easeInOutQuint,
  easeInOutSine,
  easeInQuad,
  easeInQuart,
  easeInQuint,
  easeInSine,
  easeOutBack,
  easeOutBounce,
  easeOutCirc,
  easeOutCubic,
  easeOutElastic,
  easeOutExpo,
  easeOutQuad,
  easeOutQuart,
  easeOutQuint,
  easeOutSine
} from 'es-easings'

// Use
linear(0.95) // => 0.95