Updating state of a parentless component in React

amd-medium-parent-state-update.jsx

// Child.jsx
class Child extends React.Component {
    constructor(props) {
        super(props);
    }
    render() {
        return (
            <button 
                type="button" 
                onClick={ this.props.updateParent }
            >
            Update Parent
            </button>
        );  
    }
}

// Parent.jsx
class Parent extends React.Component {
    constructor(props) {
        super(props);
        this.state = {
            shown: true
        };
    }
    updateState() {
        this.setState({ shown: false });
    }
    render() {
        return (
            <Child 
                updateParent={ this.updateState.bind(this) } 
            />
        );
    }
}

ReactDOM.render(<Parent />, document.getElementById('root'));