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**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)

state = {
        value: '3.0000',
      };
      render() {
        return <input type="number" value={this.state.value} />;
      }
    }
    let stub;
    expect(() => {
      stub = ReactDOM.render(<Stub />, container);
    }).toWarnDev(
      'You provided a `value` prop to a form field ' +
        'without an `onChange` handler.',
    );
    const node = ReactDOM.findDOMNode(stub);
    stub.setState({value: '3'});
    expect(node.value).toEqual('3');
  });
  it('should display `defaultValue` of number 0', () => {
    let stub = <input type="text" defaultValue={0} />;
    const node = ReactDOM.render(stub, container);
    expect(node.getAttribute('value')).toBe('0');
    expect(node.value).toBe('0');
  });
  it('only assigns defaultValue if it changes', () => {
    class Test extends React.Component {