Reactで子のイベントから親に情報を伝える

ここを参考に
ohs30359.hatenablog.com

class Child extends React.Component {
  handleClick = () => {
    this.props.callback({'value':'mystr'});
  }

  render() {
    return (
    <button onClick={this.handleClick}>Click</button>
    )
  }
}

class Parent extends React.Component {
  constructor(props){
	  super(props);
    this.state = {
      value: '',
    }
  }
  myFunc(message){
    const result = message.value;
    alert(result);
  }
  render() {
    return (
      <Child callback={this.myFunc}/>
    )
  }
}

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