react-reveal/src/simple/Jello.js

Really simple way to add reveal on scroll animation to your React app.

/*
 * Jello React Component
 *
 * Copyright © Roman Nosov 2017
 * Original CSS Effect - Copyright (c) 2016 Daniel Eden
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE.txt file in the root directory of this source tree.
 */

import { bool, number } from 'prop-types';
import wrap from '../lib/wrap';
import { animation, defaults } from '../lib/globals';

const
  propTypes = {
    duration: number,
    timeout: number,
    delay: number,
    count: number,
    forever: bool,
  };

const rule = `
  from, 11.1%, to {
    transform: none;
  }

  22.2% {
    transform: skewX(-12.5deg) skewY(-12.5deg);
  }

  33.3% {
    transform: skewX(6.25deg) skewY(6.25deg);
  }

  44.4% {
    transform: skewX(-3.125deg) skewY(-3.125deg);
  }

  55.5% {
    transform: skewX(1.5625deg) skewY(1.5625deg);
  }

  66.6% {
    transform: skewX(-0.78125deg) skewY(-0.78125deg);
  }

  77.7% {
    transform: skewX(0.390625deg) skewY(0.390625deg);
  }

  88.8% {
    transform: skewX(-0.1953125deg) skewY(-0.1953125deg);
}
`;

let name = false;
function make() {
  return name || (name = animation(rule));
}


function Jello({ children, out, timeout, duration = defaults.duration, delay = defaults.delay, count = defaults.count, forever, ...props } = defaults) {
  const effect = { make, duration: timeout === undefined ? duration : timeout, delay, forever, count, style: { animationFillMode: 'both', } };
  return wrap(props, effect, false, children, true);
}

Jello.propTypes = propTypes;
export default Jello;