```
render () {
  <input type="number" value={this.props.value} />
}
```

for example, when the original value is '.98', we need format it to '0.98'. but it is not  take effect。

```javascript
class Test extends React.Component {
 state = {
    value: '.98',
  }
 changeValue = () => {
    alert(0.98);
    this.setState({
      value: '0.98',
    });
  }

 render() {
    return <div>
      <input type="number" value={this.state.value} />
      <button onClick={this.changeValue}>changeValue</button>
    </div>;
  }
}

ReactDOM.render(<Test />, mountNode);
```



ReactDOM.render(
      <input type="radio" value="value" defaultChecked={true} />,
      container,
    );
    ReactDOM.render(
      <input type="radio" value="value" onChange={() => null} />,
      container,
    );
    ReactDOM.render(<input type="radio" />, container);
    expectDev(console.error.calls.count()).toBe(0);
  });
  it('should not warn if radio value changes but never becomes uncontrolled', () => {
    var container = document.createElement('div');
    ReactDOM.render(
      <input type="radio" checked={false} onChange={() => null} />,
      container,
    );
    ReactDOM.render(
      <input
        type="radio"
        value="value"
        defaultChecked={true}
        checked={false}
        onChange={() => null}
      />,
      container,
    );
    expectDev(console.error.calls.count()).toBe(0);
  });
  it('should warn if radio checked false changes to become uncontrolled', () => {