medium-rebem-5.js

import React from 'react';

class Popup extends React.Component {
  render() {
    return (
      <div block="popup" mods={{visible: this.props.visible}}>
        <div block="popup" elem="overlay" />
        <div block="popup" elem="content">{this.props.children}</div>
      </div>
    );
  }
}