<!--
  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)

});
  it('should warn for controlled value of "0" with missing onChange', () => {
    expect(() => {
      ReactDOM.render(<input type="text" value="0" />, container);
    }).toWarnDev(
      'Failed prop type: You provided a `value` prop to a form field without an `onChange` handler.',
    );
  });
  it('should warn for controlled value of false with missing onChange', () => {
    expect(() =>
      ReactDOM.render(<input type="checkbox" checked={false} />, container),
    ).toWarnDev(
      'Failed prop type: You provided a `checked` prop to a form field without an `onChange` handler.',
    );
  });
  it('should warn with checked and no onChange handler with readOnly specified', () => {
    ReactDOM.render(
      <input type="checkbox" checked={false} readOnly={true} />,
      container,
    );
    ReactDOM.unmountComponentAtNode(container);
    expect(() =>
      ReactDOM.render(
        <input type="checkbox" checked={false} readOnly={false} />,
        container,
      ),
    ).toWarnDev(
      'Failed prop type: You provided a `checked` prop to a form field without an `onChange` handler. ' +
        'This will render a read-only field. If the field should be mutable use `defaultChecked`. ' +
        'Otherwise, set either `onChange` or `readOnly`.',