<!--
  Note: if the issue is about documentation or the website, please file it at:
  https://github.com/reactjs/reactjs.org/issues/new
-->

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

Bug.

**What is the current behavior?**

Creating an `<input type='submit'` with `value={undefined}` results in a button with no text. https://codesandbox.io/s/nn7p94y3rl

The same behaviour can be seen with `type='reset'`

I have a PR open with a proposed fix. https://github.com/facebook/react/pull/12780

**What is the expected behavior?**

The input should use the browser's default value for the input (Submit for en, etc.).

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

React 16.3.2. Chrome 66.0.3359.139. macOS 10.13.4. Works in React 15 (unsure of earlier versions)

ReactDOM.render(<input type="date" defaultValue="2000-01-01" />, container);
    expect(node.value).toBe('1980-01-01');
    expect(node.defaultValue).toBe('2000-01-01');
    ReactDOM.render(<input type="date" />, container);
  });
  it('should take `defaultValue` when changing to uncontrolled input', () => {
    const node = ReactDOM.render(
      <input type="text" value="0" readOnly={true} />,
      container,
    );
    expect(node.value).toBe('0');
    expect(() =>
      ReactDOM.render(<input type="text" defaultValue="1" />, container),
    ).toWarnDev(
      'A component is changing a controlled input of type ' +
        'text to be uncontrolled.',
    );
    expect(node.value).toBe('0');
  });
  it('should render defaultValue for SSR', () => {
    const markup = ReactDOMServer.renderToString(
      <input type="text" defaultValue="1" />,
    );
    const div = document.createElement('div');
    div.innerHTML = markup;
    expect(div.firstChild.getAttribute('value')).toBe('1');
    expect(div.firstChild.getAttribute('defaultValue')).toBe(null);
  });
  it('should render value for SSR', () => {
    const element = <input type="text" value="1" onChange={() => {}} />;