**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/)

expect(div.firstChild.getAttribute('name')).toBe(null);
  });
  it('should display "foobar" for `defaultValue` of `objToString`', function() {
    var objToString = {
      toString: function() {
        return 'foobar';
      },
    };
    var stub = <input type="text" defaultValue={objToString} />;
    stub = ReactTestUtils.renderIntoDocument(stub);
    var node = ReactDOM.findDOMNode(stub);
    expect(node.value).toBe('foobar');
  });
  it('should display `value` of number 0', function() {
    var stub = <input type="text" value={0} />;
    stub = ReactTestUtils.renderIntoDocument(stub);
    var node = ReactDOM.findDOMNode(stub);
    expect(node.value).toBe('0');
  });
  it('should allow setting `value` to `true`', function() {
    var container = document.createElement('div');
    var stub = <input type="text" value="yolo" onChange={emptyFunction} />;
    var node = ReactDOM.render(stub, container);
    expect(node.value).toBe('yolo');
    stub = ReactDOM.render(
      <input type="text" value={true} onChange={emptyFunction} />,
      container
    );
    expect(node.value).toEqual('true');
  });