<!--
  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)

if (__DEV__) {
    ReactControlledValuePropTypes.checkPropTypes('input', props);
    if (
      props.checked !== undefined &&
      props.defaultChecked !== undefined &&
      !didWarnCheckedDefaultChecked
    ) {
      warning(
        false,
        '%s contains an input of type %s with both checked and defaultChecked props. ' +
          'Input elements must be either controlled or uncontrolled ' +
          '(specify either the checked prop, or the defaultChecked prop, but not ' +
          'both). Decide between using a controlled or uncontrolled input ' +
          'element and remove one of these props. More info: ' +
          'https:fb.me/react-controlled-components',
        getCurrentFiberOwnerNameInDevOrNull() || 'A component',
        props.type,
      );
      didWarnCheckedDefaultChecked = true;
    }
    if (
      props.value !== undefined &&
      props.defaultValue !== undefined &&
      !didWarnValueDefaultValue
    ) {
      warning(
        false,
        '%s contains an input of type %s with both value and defaultValue props. ' +