bbo/sleep.js

bbo is a utility library of zero dependencies for javascript.

'use strict';

var cachedSetTimeout = setTimeout;

function createSleepPromise(timeout, _ref) {
  var useCachedSetTimeout = _ref.useCachedSetTimeout;
  var timeoutFunction = useCachedSetTimeout ? cachedSetTimeout : setTimeout;
  return new Promise(resolve => {
    timeoutFunction(resolve, timeout);
  });
}

function sleep(timeout) {
  var _ref2 = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {},
      useCachedSetTimeout = _ref2.useCachedSetTimeout;

  var sleepPromise = createSleepPromise(timeout, {
    useCachedSetTimeout: useCachedSetTimeout
  });

  function promiseFunction(value) {
    return sleepPromise.then(() => value);
  }

  promiseFunction.then = function () {
    return sleepPromise.then.apply(sleepPromise, arguments);
  };

  promiseFunction.catch = Promise.resolve().catch;
  return promiseFunction;
}

module.exports = sleep;