Function executeDirectDispatch

docs/lib/react.js:2941–2954

* Execution of a "direct" dispatch - there must be at most one dispatch * accumulated on the event or it is considered an error. It doesn't really make * sense for an event with multiple dispatches (bubbled) to keep track of the * return values at each dispatch execution, but it does tend to make

(event)

 * @return {*} The return value of executing the single dispatch.
 */
function executeDirectDispatch(event) {
  if ("development" !== 'production') {
    validateEventDispatches(event);
  }
  var dispatchListener = event._dispatchListeners;
  var dispatchInstance = event._dispatchInstances;
  !!Array.isArray(dispatchListener) ? "development" !== 'production' ? invariant(false, 'executeDirectDispatch(...): Invalid `event`.') : invariant(false) : void 0;
  event.currentTarget = EventPluginUtils.getNodeFromInstance(dispatchInstance);
  var res = dispatchListener ? dispatchListener(event) : null;
  event.currentTarget = null;
  event._dispatchListeners = null;
  event._dispatchInstances = null;
  return res;
}

/**
 * @param {SyntheticEvent} event