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penner

penner

A library for Penner's easing equations

what?

See http://upshots.org/actionscript/jsas-understanding-easing

usage

var t = 0, // current time (ms, s, frames, ...) 
    b = 10, // initial value 
    c = 100, // change in value (final value - initial value) 
    d = 2 // duration (same units as t) 
    value = penner.easeOutQuad(t, b, c, d);

included easing functions

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

size

Raw 7880 bytes
Uglified 3200 bytes
Uglified + gzipped 865 bytes

environment support

Any browser (as window.penner), AMD, CommonJS, NodeJS