**Do you want to request a *feature* or report a *bug*?**

bug? Maybe.

**What is the current behavior?**

Using non-delegated handler for submit event.

**What is the expected behavior?**

After IE9, at least I know, submit event bubbled up.

**Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?**

16.2.0
expect(handleReset).toHaveBeenCalledTimes(1);
    formRef.current.dispatchEvent(
      new Event('submit', {
        
        bubbles: true,
      }),
    );
    expect(handleSubmit).toHaveBeenCalledTimes(1);
    formRef.current.dispatchEvent(
      new Event('submit', {
        
        bubbles: true,
      }),
    );
    expect(handleSubmit).toHaveBeenCalledTimes(2); 
    document.body.removeChild(container);
  });
  it('should dispatch loadstart only for media elements', () => {
    const container = document.createElement('div');
    document.body.appendChild(container);
    const imgRef = React.createRef();
    const videoRef = React.createRef();
    const handleImgLoadStart = jest.fn();
    const handleVideoLoadStart = jest.fn();
    ReactDOM.render(
      <div>
        <img ref={imgRef} onLoadStart={handleImgLoadStart} />
        <video ref={videoRef} onLoadStart={handleVideoLoadStart} />
      </div>,
      container,