Push API

Push message delivery

The Push API enables your server to send messages to users via a push service. Messages arrive even when the app is closed, and the service worker handles them.

Subscribe to push messages

Subscribe to push and send endpoint to server.

navigator.serviceWorker.ready.then(reg => {
  reg.pushManager.subscribe({
    userVisibleOnly: true,
    applicationServerKey: urlBase64ToUint8Array(PUBLIC_KEY)
  }).then(subscription => {
    console.log('Subscribed:', subscription.endpoint);
    // Send subscription to server
    fetch('/subscribe', {
      method: 'POST',
      body: JSON.stringify(subscription)
    });
  });
});

Output:

App subscribed to push messages; server can now send messages to user.