Function constructor

src/subsections/landingpage/Newsletter.js:4–8

(props)

class NewsletterSignupForm extends Component {
  constructor(props) {
    super(props);
    this.state = { email: "", submitted: false };
    this.handleChange = this.handleChange.bind(this);
  }

  handleChange(event) {
    this.setState({ [event.target.name]: event.target.value });