React Suspense with the Fetch API

suspense.js

class Suspense extends React.Component {

  constructor(props) {
    super(props);
    this.state = {
      error: null
    };
  }

  componentDidCatch(e) {
    this.setState({ error: e });
  }
  
  render() {
    if (this.state.error) {
      return this.props.fallback;
    }
    return this.props.children;
  }
}

/*
<Suspense fallback={<Loading />}>
  <ErrorThrower />
</Suspense>
*/