Function dispatch

packages/react-dom/src/__tests__/ReactDOMEventPropagation-test.js:65–72

(node)

        reactEventType: 'animationend',
        nativeEvent: 'animationend',
        dispatch(node) {
          node.dispatchEvent(
            new Event('animationend', {
              bubbles: true,
              cancelable: true,
            }),
          );
        },
      });
    });