React 0.14.7: `<option value="">empty</option>` emits empty string on change
http://jsbin.com/pisita/10/edit?html,js,console,output
React 15.0.0-rc.1`<option value="">empty</option>` emits string with value "empty" on change
http://jsbin.com/bemaze/12/edit?html,js,console,output
This is because React 15.0.0-rc.1 cuts off `value=""` from option tag

var group = queryRoot.querySelectorAll(
      'input[name=' + JSON.stringify('' + name) + '][type="radio"]');
    for (var i = 0; i < group.length; i++) {
      var otherNode = group[i];
      if (otherNode === rootNode ||
          otherNode.form !== rootNode.form) {
        continue;
      }
      
      
      
      
      var otherInstance = ReactDOMComponentTree.getInstanceFromNode(otherNode);
      invariant(
        otherInstance,
        'ReactDOMInput: Mixing React and non-React radio inputs with the ' +
        'same `name` is not supported.'
      );
      
      
      
      ReactUpdates.asap(forceUpdateIfMounted, otherInstance);
    }
  }
  return returnValue;
}
module.exports = ReactDOMInput;