Built-in eases

Both the js and waapi animate() functions include a collection of built-in easing functions that can be specified by name directly in the ease parameter:

animate(target, { x: 100, ease: 'outQuad' });
animate(target, { x: 100, ease: 'outExpo' });
animate(target, { x: 100, ease: 'outElastic(.8, 1.2)' });

All built-in easing functions are also accessible through the imported eases object:

import { eases } from 'animejs';

eases.outQuad;
eases.outExpo;
eases.outElastic(.8, 1.2);

List of built-in easing functions

Type Parameters Variants (click the links to open in the editor)
Linear -- 'linear'
Power power = 1.675 'in', 'out', 'inOut', 'outIn'
Quad -- 'inQuad', 'outQuad', 'inOutQuad', 'outInQuad'
Cubic -- 'inCubic', 'outCubic', 'inOutCubic', 'outInCubic'
Quart -- 'inQuart', 'outQuart', 'inOutQuart', 'outInQuart'
Quint -- 'inQuint', 'outQuint', 'inOutQuint', 'outInQuint'
Sine -- 'inSine', 'outSine', 'inOutSine', 'outInSine'
Exponential -- 'inExpo', 'outExpo', 'inOutExpo', 'outInExpo'
Circular -- 'inCirc', 'outCirc', 'inOutCirc', 'outInCirc'
Bounce -- 'inBounce', 'outBounce', 'inOutBounce', 'outInBounce'
Back overshoot = 1.70158 'inBack', 'outBack', 'inOutBack', 'outInBack'
Elastic amplitude = 1,
period = .3
'inElastic', 'outElastic', 'inOutElastic', 'outInElastic'

Built-in eases code example

import { animate, waapi } from 'animejs';

animate('.row:nth-child(1) .square', {
  x: '17rem',
  rotate: 360,
  ease: 'inOut',
});

animate('.row:nth-child(2) .square', {
  x: '17rem',
  rotate: 360,
  ease: 'inOut(3)',
});

waapi.animate('.row:nth-child(3) .square', {
  x: '17rem',
  rotate: 360,
  ease: 'inOutExpo',
});
<div class="medium row">
  <div class="square"></div>
  <div class="padded label">'inOut'</div>
</div>
<div class="medium row">
  <div class="square"></div>
  <div class="padded label">'inOut(3)'</div>
</div>
<div class="medium row">
  <div class="square"></div>
  <div class="padded label">'inOutExpo'</div>
</div>