carbon-components/src/globals/js/misc/get-launching-details.js

The Carbon Design System is IBM’s open-source design system for products and experiences.

/**
 * Copyright IBM Corp. 2016, 2018
 *
 * This source code is licensed under the Apache-2.0 license found in the
 * LICENSE file in the root directory of this source tree.
 */

export default function getLaunchingDetails(evt) {
  if (!evt || typeof evt === 'function') {
    return {
      launchingElement: null,
      launchingEvent: null,
    };
  }

  const launchingElement = evt.delegateTarget || evt.currentTarget || evt;
  const launchingEvent = evt.currentTarget && evt;

  if (launchingElement && !launchingElement.nodeType) {
    throw new TypeError('DOM Node should be given for launching element.');
  }

  if (launchingEvent && !launchingEvent.type) {
    throw new TypeError('DOM event should be given for launching event.');
  }

  return {
    launchingElement,
    launchingEvent,
  };
}