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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)

);
    expect(() =>
      ReactDOM.render(<input type="radio" value="value" />, container),
    ).toWarnDev(
      'Warning: A component is changing a controlled input of type radio to be uncontrolled. ' +
        'Input elements should not switch from controlled to uncontrolled (or vice versa). ' +
        'Decide between using a controlled or uncontrolled input ' +
        'element for the lifetime of the component. More info: https://fb.me/react-controlled-components\n' +
        '    in input (at **)',
    );
  });
  it('sets type, step, min, max before value always', () => {
    const log = [];
    const originalCreateElement = document.createElement;
    spyOnDevAndProd(document, 'createElement').and.callFake(function(type) {
      const el = originalCreateElement.apply(this, arguments);
      let value = '';
      if (type === 'input') {
        Object.defineProperty(el, 'value', {
          get: function() {
            return value;
          },
          set: function(val) {
            value = '' + val;
            log.push('set property value');
          },
        });
        spyOnDevAndProd(el, 'setAttribute').and.callFake(function(name) {
          log.push('set attribute ' + name);
        });