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Make your PWA engaging - enable push notifications

In this step, we will talk about how to add advanced capabilities such as notifications to our PWA.

Update workbox-build module

You will need to update the vite.config.ts file to utilize injectManifest strategy.

This time, the vite-plugin-pwa plugin will first build the custom service worker via rollup and then, with previous build result will call to workbox injectManifest method. It allows you to create you own service worker file. So let's create a new sw.js file in the project's ./public/ folder. Update both sw.js and vite.config.ts files to have the same code as shown in solution 04-notifications.

Display notifications in action center

PWAs can display notifications by using the Notifications API. You will create a notification component in Repose app to enable this feature.

Request permission to display notifications

You will first need to check if Notifications API is supported and request a user's permission to display notifications. You can do this by adding the following code to notification component:

  private requestNotificationPermission() {
    if ("Notification" in window) {
      console.log("Notifications API is supported");

      Notification.requestPermission().then(permission => {
        if (permission === 'granted') {
          console.log('Notification permission granted.');
        }
      });
    } else {
      console.log("Notifications API is not supported");
    }
  }

Display a notification

Once you know that the API is supported and the user has accepted notifications, you can display a notification by creating a Notification object. Here is a function that will display a notification to remind the user to drink some water:

  private displayNotification() {
    const notifTitle = "Hi";
    const notifBody = "It's time to drink some water 💦";
    const notifImg = `assets/media/toast.jpg`;
    const options = {
      body: notifBody,
      icon: notifImg,
    };
    new Notification(notifTitle, options);
  }

Make sure you add the image to ./public/assets/ folder. And take a look at the sample code in the solution 04-notifications to add notification component to the Repose app.

Summary and next steps

Congratulations! You now have an engaging PWA that can be installed on different devices and have offline support.

You can further customize notifications by adding actions to them. You will need to setup a push service to send push notifications to your users.

Next, let's see how we can 👉🏼 audit the PWA and make it store ready!

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