FormInput.component.js

class FormInput extends React.Component {

  constructor(props) {
    super(props);
    this.textInput = React.createRef();
  }
  
  hasText() {
    return this.textInput.current.value.length > 0;
  }
  
  selectInputText() {
    this.textInput.current.select();
  }
  
  render() {
    return (
      <div>
        {/* Creating a string ref named: textInput */}
        <input type="text" ref={this.textInput} />
      </div>
    );
  }
  
}