Method constructor

src/UncontrolledAlert.js:5–10

(props)

class UncontrolledAlert extends Component {
  constructor(props) {
    super(props);

    this.state = { isOpen: true };
    this.toggle = this.toggle.bind(this);
  }

  toggle() {
    this.setState((prevState) => ({ isOpen: !prevState.isOpen }));