Get a reference on the DOM element.

RootRef.js

import React from 'react';
import ReactDOM from 'react-dom';
import PropTypes from 'prop-types';

class RootRef extends React.Component {
  componentDidMount() {
    this.props.rootRef(ReactDOM.findDOMNode(this))
  }

  componentWillUnmount() {
    this.props.rootRef(null)
  }

  render() {
    return this.props.children
  }
}

RootRef.propTypes = {
  children: PropTypes.element.isRequired,
  rootRef: PropTypes.func.isRequired,
};

export default RootRef;

Example of usage:

<RootRef
  rootRef={node => {
    console.log(node)
  }}
>
  <Paper />
</RootRef>