title: Get the value of checkbox using ref in React
body: <p>is there any way to get value of checkbox using ref in React. Normal way return always value "on" to me.</p>
  
  <pre><code>var MyForm = React.createClass({
      save: function(){
          console.log(this.refs.check_me.value);
      },
  
      render: function(){
          return &lt;div&gt;&lt;h1&gt;MyForm&lt;/h1&gt;
              &lt;div className="checkbox"&gt;
                  &lt;label&gt;
                      &lt;input type="checkbox" ref="check_me" /&gt; Check me out
                  &lt;/label&gt;
              &lt;/div&gt;
              &lt;button className="btn btn-default" onClick={this.save}&gt;Submit&lt;/button&gt;
          &lt;/div&gt;
      }
  });
  </code></pre>