**Do you want to request a _feature_ or report a _bug_?**
Bug
**What is the current behavior?**
React at the beginning rounds `input[type=range]` value to 0 or 1, and then looks at step parameter which is 0.1 for example. The result is incorrect value of input after component mounts. When I put `value` attribute after `step` attributes, it works fine.
**If the current behavior is a bug, please provide the steps to reproduce and if possible a minimal demo of the problem via https://jsfiddle.net or similar (template: https://jsfiddle.net/reactjs/69z2wepo/).**
Demo: https://jsfiddle.net/2Lm4gy5k/ Comment or uncomment line 13 and 14 to see the difference.

**What is the expected behavior?**
To always look at step parameter and then round the value (if required).
**Which versions of React, and which browser / OS are affected by this issue? Did this work in previous versions of React?**
v15.1.0 (Opera, Chrome, Firefox). 

Yes, works in v.0.14.0 (https://jsfiddle.net/wrcnLugd/)

}
  },
  updateWrapper: function(inst) {
    var props = inst._currentElement.props;
    if (__DEV__) {
      var controlled = isControlled(props);
      var owner = inst._currentElement._owner;
      if (!inst._wrapperState.controlled && controlled && !didWarnUncontrolledToControlled) {
        warning(
          false,
          '%s is changing an uncontrolled input of type %s to be controlled. ' +
          'Input elements should not switch from uncontrolled to controlled (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',
          owner && owner.getName() || 'A component',
          props.type
        );
        didWarnUncontrolledToControlled = true;
      }
      if (inst._wrapperState.controlled && !controlled && !didWarnControlledToUncontrolled) {
        warning(
          false,
          '%s is changing a controlled input of type %s 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',
          owner && owner.getName() || 'A component',
          props.type
        );
        didWarnControlledToUncontrolled = true;