If you subscribe to the notifications of some websites, you may sometimes see a strange notification with this content: “This site has been updated in the background”. What does that mean? And if you are the website owner, how can you prevent that notification?
A user visits a website and subscribes to the notifications. Then, after some time, he opens the browser settings and clicks “clear data” in order to remove the history and all the data stored by the browser on the device. What happens to the notifications in this case?
How can you manage push notifications when a user uses multiple accounts on the same browser? What can you do if multiple users use the same device / browser?
Is it possible to instantly deliver a web push notification to notify a phone call or to deliver any other time-sensitive notification?
How can you associate a push subscription to a specific user? How can you implement log-in and log-out for web push notifications?
How can you collect analytics for web push notifications (e.g. clicks)?
These two methods defined by the Push API are used to get the push subscription from the browser. What is the difference between them?
When a user is visiting your website and subscribes to notifications, you get a push subscription, which must be stored somewhere (in a database) in order to send notifications to that user.
How can you verify that a push subscription is still valid (and not invalid or expired)? How can you detect if a user has unsubscribed and the subscription is no longer valid?
What can you do if you receive that notifications? What does it mean? How can you fix it?
How can you find out if the current browser supports the Push API and Web Push Notifications?
Sometimes you just need to send the same notification to all users that have subscribed to your website notifications. Let’s see how to achieve that.
Recurring web notifications (e.g. every day, every week, every month, etc.) can be a simple strategy to re-engage your website users.
How can you create a web notification now that is displayed some time later?
Is it possible to display the notifications from a website even when Chrome, Firefox or other browsers are closed?
If you are implementing web push notifications on a website you should be familiar with the concept of endpoint.
When you send a web push notification to a browser push service, you may get an HTTP status code that represents an error.
One of the major features of web apps (both on desktop and mobile browsers) is the ability to send push notifications that are delivered even when the website is closed.
If you are adding web push notifications to a website, you will probably hear about VAPID. Let’s see what it is and why it’s useful.
When you need to send events from you application server (backend) there are various technologies that you can use.