React linked state with mixin

main.jsx

var Hello = React.createClass({
    mixins: [React.addons.LinkedStateMixin],
    getInitialState: function() {
        return {input: 0.2};
    },

    render: function() {
        var total = this.state.input1 + this.state.input2;
        return (
            <div>{total}<br/>
                <input type="text" valueLink={this.linkState('input')} />;
                <input type="text" valueLink={this.linkState('input')} />;
            </div>
        );
    }

});

React.render(<Hello />, document.getElementById('DemoApp'));