Why is createRef needed in class components?

Question

React

Why is it needed React.createRef()in class components?

What is the essential difference between:

class MyComponent extends React.Component {
  myRef = null
  
  render() {
    return <div ref={ref => myRef = ref} />;
  }
}

and

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

Answer 1

Reading the documentation - https://ru.reactjs.org/docs/react-api.html#reactcr...