Is it possible to use async / await in React JS?

If you building using create-react-app it’s been available since v0.2.3

https://github.com/facebookincubator/create-react-app/releases/tag/v0.2.3

It can be used inside a Component like this

class App extends Component {
  constructor(props) {
    super(props);
    this.state = { message: '' };
  }

  async componentDidMount() {
    this.setState({ message: 'loading...' });
    let d = await getData('/posts/1');
    this.setState({ message: d });
  }

  render() {
    let { message } = this.state;
    return (
      <div className="App">
        <p className="App-intro">
          { message }
        </p>
      </div>
    );
  }
}

See:

https://github.com/facebookincubator/create-react-app/issues/1024