HelmetFinalStep.js

import React from 'react';
import { Helmet } from 'react-helmet';

class App extends React.Component {
    constructor(props) {
        super(props);
        this.state = {
            titleName: ''
        };
    }
    changeTitle(ev) {
        this.setState({
            titleName: ev.target.value
        });
    }
    render() {
        return ( 
          <div className="App">
            <Helmet>
              <title>{this.state.titleName}</title>
			      </Helmet>
			      <input onChange = { this.changeTitle.bind(this)}></input>
		      </div>
		    );
    }
}
export default App;