Function mountTransition

docs/external/js/react-dom.development.js:15675–15682

(config)

  }

  function mountTransition(config) {
    var _mountState2 = mountState(false),
        isPending = _mountState2[0],
        setPending = _mountState2[1];

    var start = mountCallback(startTransition.bind(null, setPending, config), [setPending, config]);
    return [start, isPending];
  }

  function updateTransition(config) {
    var _updateState2 = updateState(),