Function trapBubbledEvent

docs/external/js/react-dom.development.js:4255–4257

(topLevelType, element)

    return _enabled;
  }
  function trapBubbledEvent(topLevelType, element) {
    trapEventForPluginEventSystem(element, topLevelType, false);
  }
  function trapCapturedEvent(topLevelType, element) {
    trapEventForPluginEventSystem(element, topLevelType, true);
  }