evolving-react-patterns-async-await

index.js

componentDidMount() {
    this.setState({ content: this.props.loading() })

    try {
        const res = await fetch(this.props.url);
        this.setState({ content: this.props.done(res.json()) });
    } catch (err) {
        this.setState({ content: this.props.error() });
    }
}