React portal class component

PortalToElement.jsx

import React from "react";
import ReactDOM from "react-dom";

export default class PortalToElement extends React.Component {
  constructor(props) {
    super(props);
    this.el = document.createElement("div");
    this.el.style.display = "contents";
    // The <div> is a necessary container for our
    // content, but it should not affect our layout.
    // Only works in some browsers, but generally
    // doesn't matter since this is at
    // the end anyway. Feel free to delete this line.
  }

  componentDidMount() {
    this.props.element.appendChild(this.el);
  }

  componentWillUnmount() {
    this.props.element.removeChild(this.el);
  }

  render() {
    return ReactDOM.createPortal(this.props.children, this.el);
  }
}