bug

import React, { Component } from 'react';

class WidgetApp extends Component {

  constructor(props) {
    super(props);
    this.state = { isOpen: false };
  }

  toggleModal = () => {
    this.setState({
      isOpen: !this.state.isOpen,
    });
  };

  render() {
    return (
      <div>
        <p>I am a Widget - <a href={'/selvbetjening'}>Selvbetjening</a></p>
        <button onClick={e => {  this.toggleModal(e); }}>
          Open th
        </button>
      </div>
    );
  }
}

export default WidgetApp;