Get the value of checkbox using ref in React

For checkbox, use “checked” instead of “value”:

var MyForm = React.createClass({
  save: function () {
    console.log(this.refs.check_me.checked);
  },

  render: function () {
    return <div><h1>MyForm</h1>
      <div className="checkbox">
        <label>
          <input type="checkbox" ref="check_me" /> Check me out
        </label>
      </div>
      <button className="btn btn-default" onClick={this.save}>Submit</button>
    </div>
  }
});

As a result: