How do I implement push notifications in a PWA?

How do I implement push notifications in a PWA?

To implement push notifications in a Progressive Web App (PWA), you'll need to follow these steps: 1. Register a service worker. 2. Request permission from the user to send notifications. 3. Use the Push API to subscribe the user to push notifications. 4. Send push messages from your server.

What is a service worker and why is it important?

A service worker is a script that runs in the background of your web application, separate from the web page. It enables features like push notifications and offline capabilities, making it essential for PWAs.

Can you show me an example of the code for subscribing to push notifications?

Sure! Here's a basic example:

navigator.serviceWorker.register('service-worker.js')
  .then(function(registration) {
    return registration.pushManager.subscribe({
      userVisibleOnly: true,
      applicationServerKey: 'YOUR_PUBLIC_VAPID_KEY'
    });
  })
  .then(function(subscription) {
    console.log('User is subscribed:', subscription);
  })
  .catch(function(error) {
    console.error('Failed to subscribe the user: ', error);
  });

What do I need on the server side to send notifications?

On the server side, you'll need to use a library to send push notifications, such as web-push for Node.js. You'll also need to store the subscription details you receive from the client.