tweenkle/es/easing/Bounce.js

Lightweight tweening library for all your tweening and animation needs.

export var Out = function Out(time, beginningValue, changeValue, duration) {
  if ((time /= duration) < 1 / 2.75) {
    return changeValue * (7.5625 * time * time) + beginningValue;
  }

  if (time < 2 / 2.75) {
    return changeValue * (7.5625 * (time -= 1.5 / 2.75) * time + .75) + beginningValue;
  }

  if (time < 2.5 / 2.75) {
    return changeValue * (7.5625 * (time -= 2.25 / 2.75) * time + .9375) + beginningValue;
  }

  return changeValue * (7.5625 * (time -= 2.625 / 2.75) * time + .984375) + beginningValue;
};
export var In = function In(time, beginningValue, changeValue, duration) {
  return changeValue - bounceEaseOut(duration - time, 0, changeValue, duration) + beginningValue;
};
export var InOut = function InOut(time, beginningValue, changeValue, duration) {
  if (time < duration / 2) {
    return In(time * 2, 0, changeValue, duration) * .5 + beginningValue;
  }

  return Out(time * 2 - duration, 0, changeValue, duration) * .5 + changeValue * .5 + beginningValue;
};
export default {
  In: In,
  Out: Out,
  InOut: InOut
};