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

Carbon Components is a component library for IBM Cloud

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,
  };
}