text: import React from 'react';
  import ReactDOM from 'react-dom';
  import PropTypes from 'prop-types';
  
  export default class SimpleTooltip extends React.Component {
    static propTypes = {
      tooltips: PropTypes.object.isRequired,
      children: PropTypes.node.isRequired,
      title: PropTypes.string.isRequired,
    }
  
    componentDidMount() {
      this.disposable = this.props.tooltips.add(ReactDOM.findDOMNode(this.child), {title: () => this.props.title});
    }
  
    componentWillUnmount() {
      this.disposable.dispose();
    }
  
    componentDidUpdate(prevProps) {
      if (prevProps.title !== this.props.title) {
        this.disposable.dispose();
        this.disposable = this.props.tooltips.add(ReactDOM.findDOMNode(this.child), {title: () => this.props.title});
      }
    }
  
    render() {
      const child = React.Children.only(this.props.children);
      return React.cloneElement(child, {ref: e => { this.child = e; }});
    }
  }
  