element-web/src/VelocityBounce.js
Travis Ralston f1ac3d2f64 Convert imports to ES6 from CommonJS
This is needed because `require()` means something different in webpack - it ends up importing the module as something we didn't expect (and is occasionally async)
2019-12-22 21:16:06 -07:00

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JavaScript

import Velocity from "velocity-animate";
// courtesy of https://github.com/julianshapiro/velocity/issues/283
// We only use easeOutBounce (easeInBounce is just sort of nonsensical)
function bounce( p ) {
let pow2;
let bounce = 4;
while ( p < ( ( pow2 = Math.pow( 2, --bounce ) ) - 1 ) / 11 ) {
// just sets pow2
}
return 1 / Math.pow( 4, 3 - bounce ) - 7.5625 * Math.pow( ( pow2 * 3 - 2 ) / 22 - p, 2 );
}
Velocity.Easings.easeOutBounce = function(p) {
return 1 - bounce(1 - p);
};