react-virtualized/dist/es/utils/requestAnimationTimeout.js

React components for efficiently rendering large, scrollable lists and tabular data

import { caf, raf } from './animationFrame';
/*:: export type AnimationTimeoutId = {
  id: number,
};*/
export var cancelAnimationTimeout = function cancelAnimationTimeout(frame /*: AnimationTimeoutId*/) {
  return caf(frame.id);
};

/**
 * Recursively calls requestAnimationFrame until a specified delay has been met or exceeded.
 * When the delay time has been reached the function you're timing out will be called.
 *
 * Credit: Joe Lambert (https://gist.github.com/joelambert/1002116#file-requesttimeout-js)
 */
export var requestAnimationTimeout = function requestAnimationTimeout(callback /*: Function*/, delay /*: number*/) /*: AnimationTimeoutId*/{
  var start;
  // wait for end of processing current event handler, because event handler may be long
  Promise.resolve().then(function () {
    start = Date.now();
  });
  var _timeout = function timeout() {
    if (Date.now() - start >= delay) {
      callback.call();
    } else {
      frame.id = raf(_timeout);
    }
  };
  var frame /*: AnimationTimeoutId*/ = {
    id: raf(_timeout)
  };
  return frame;
};