how to use refs in react js code example

Example 1: use ref in component reactjs

class CustomTextInput extends React.Component {  // ...
}

Example 2: use ref in component reactjs

class MyComponent extends React.Component {
  constructor(props) {
    super(props);
    this.myRef = React.createRef();  }
  render() {
    return <div ref={this.myRef} />;  }
}