Class DataProvider

code/composition/src/app.jsx:10–21

const Title = () => <h1>Hello there!</h1>;

class DataProvider extends React.Component {
  constructor(props) {
    super(props);

    this.state = { data: null };
    setTimeout(() => this.setState({ data: 'Hey there!' }), 5000);
  }
  render() {
    if (this.state.data === null) return null;
    return <section>{ this.props.render(this.state.data) }</section>;
  }
}
DataProvider.propTypes = {
  render: PropTypes.func
};