Function constructor

site/components/CodeBlock.js:37–46

(props)

  };

  constructor(props) {
    super(props);
    this.state = {
      chosen: false,
      syntax: this.props.es7.trim().length && 'es7' ||
              this.props.es6.trim().length && 'es6' ||
              this.props.es5.trim().length && 'es5',

    };
  }

  componentDidMount() {
    this.unsubscribe = subscribe(this.handlePreferredSyntaxChange.bind(this));