updateServiceWorker

  const updateServiceWorker = () => {
    const registrationWaiting = serviceWorkerRegistration.waiting;

    if (registrationWaiting) {
      registrationWaiting.postMessage({ type: 'SKIP_WAITING' });

      registrationWaiting.addEventListener('statechange', e => {
        if (e.target.state === 'activated') {
          window.location.reload();
        }
      });
    }
  };