<div id="root"></div>

class App extends React.Component {
    constructor(props) {
      super(props)
      
      this.textInput = React.createRef();
      this.state = {
        value: ''
      }
    }
  
  handleSubmit = e => {
    e.preventDefault();
    this.setState({ value: this.textInput.current.value})
  };

  render() {
    return (
      <div>
        <h1>React Ref - createRef</h1>
        <h3>Value: {this.state.value}</h3>
        <form onSubmit={this.handleSubmit}>
          <input type="text" ref={this.textInput} />
          <button>Submit</button>
        </form>
      </div>
    );
  }
}

ReactDOM.render(<App />, document.getElementById("root"));
View Compiled

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/react/16.3.1/umd/react.development.js
  2. https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.3.1/umd/react-dom.development.js