traditional-typerace.js

class App extends React.Component {
 state = { userText: '' };

 updateUserText = event => {
   this.setState({ userText: event.target.value });
   console.log('current userText', this.state.userText);
 }

 render() {
   return (
     <div>
       <h2>Type Race</h2>
       <input value={this.state.userText} onChange={this.updateUserText} />
     </div>
   );
 }
}