Add push notifications to a web app | Google Codelabs

1. Overview Push messaging provides a simple and effective way to re-engage with your users. In this codelab, you'll learn how to add push notifications to your web app. What you'll learn How to subscribe and unsubscribe a user for push messaging How to handle incoming push messages How to display a notification How to respond to notification clicks What you'll need Chrome 52 or above Web Server f