function openWebSocket() {
  console.log('open websocket');
}

self.addEventListener('install', function(event) {
  self.skipWaiting();
  console.log('Installed', event);
});
self.addEventListener('activate', (event) => {
  // event.waitUntil(self.clients.claim());
  event.waitUntil(openWebSocket());
  self.clients.claim();
});

self.addEventListener('push', (event) => {
  const data = event.data.json();

  const title = data.title || 'New Message';
  const options = {
    body: data.body || 'You have a new message',
    icon: 'path/to/icon.png',
    badge: 'path/to/badge.png',
    vibrate: [200, 100, 200], // 振动
    // Other notification options
  };

  event.waitUntil(
    self.registration.showNotification(title, options)
  );
});

// Send a message to all clients every minute
setInterval(function() {
  self.clients.matchAll().then(function(clients) {
    clients.forEach(function(client) {
      client.postMessage('Service worker is still running');
    });
  });
}, 60000); // 60000 ms = 1 minute