// Notification click event listener
self.addEventListener("notificationclick", (e) => {
  // Close the notification popout
  e.notification.close();
  // Get all the Window clients
  e.waitUntil(
    clients.matchAll({ type: "window" }).then((clientsArr) => {
      // If a Window tab matching the targeted URL already exists, focus that;
      const hadWindowToFocus = clientsArr.some((windowClient) =>
        windowClient.url === e.notification.data.url
          ? (windowClient.focus(), true)
          : false,
      );

      // Otherwise, open a new tab to the applicable URL and focus it.
      if (!hadWindowToFocus)
        clients
          .openWindow(e.notification.data.url)
          .then((windowClient) => (windowClient ? windowClient.focus() : null));
    }),
  );
});