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

class App extends React.Component {
    state = {
    value: ''
  }
  handleSubmit = e => {
    e.preventDefault();
    this.setState({ value: this.refs.textInput.value})
  };

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