/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @flow strict
 */
const emptyObject = {};
type EventInit = {
  bubbles?: boolean,
  cancelable?: boolean,
  detail?: {
    [key: string]: mixed
  },
};
declare export default function dispatchCustomEvent(target: EventTarget, type: string, payload?: EventInit): any;