[Novu](https://github.com/novuhq/novu) is an open-source notification infrastructure for developers.
Articles about web push notifications
Have you ever wondered what happens to the subscribers that receive your notifications if you decide to migrate to a new domain?
There are different strategies that you can use to allow a user to opt-out from the push notifications of a website that they have previously enabled.
In this article we give some tips for troubleshooting, in case the image of a web push notification is not displayed.
Sometimes you have multiple prompts on a website (e.g. a cookie consent banner and a notification prompt) and for UI / UX reasons you may want to prevent the overlapping of the different prompts. Let's see some solutions.
This tutorial can be useful for development if you want to test web push notifications on your domain using Pushpad. You will see how to create a demo page where a user can subscribe to notifications and send a notification with custom options to himself.
Let's see some workarounds to add web push notifications to a website if you cannot add a service worker to the root folder.
A list of all the official documentation provided by the push services about the HTTP status codes and errors that can be returned. When an application sends a notification to a browser push service, it should check the status code returned and take appropriate actions.
In this tutorial we explain how to use the `pushpad` gem with the `noticed` gem to create multi-channel notifications in a Rails application. In particular we'll use the `noticed` gem for the notifications in general, while Pushpad will be used to deliver the web push notifications in real time, even when the website is closed.
A "push subscription" represents a subscriber to the push notifications of a website.
The long-awaited support for web push notifications in Safari is finally here.
The scope of a service worker defines when it is active and usually depends on the path where it is located. However in this tutorial we'll see some directives that allow to change the default scope of a service worker, regardless of its location.
In this tutorial we'll see how you can send push notifications from your Wix website.
Can you change the push service used by the browser? Is it possible to build and use a custom push service for delivering the web push notifications to the browser?
Sending web push notifications directly from a browser to another, using the Push API protocol, is not a secure practice. Now CORS is finally removed from all browser push services.
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?
In order to optimize the number of people that subscribe to your notifications, you need to use the right user interface (UI). It's also important to design a good user experience (UX), so that the notification prompt is perceived as something useful for the user and not as an annoyance. In this post we'll analyze different approaches and user interfaces that are useful to ask users to subscribe to web push notifications.
Are you looking for a bell icon to represent push notifications or to create a subscribe button on your website?
You can include newlines and line breaks inside the body of web notifications.
Is it possible to customize the style of web push notifications?
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)?
Is it possible to subscribe the users to web push notifications from an iframe?
These two methods defined by the Push API are used to get the push subscription from the browser. What is the difference between them?
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?
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.
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.
What is the difference between `Notification.icon`, `Notification.image` and `Notification.badge`?
Is it possible to replace the Chrome logo / browser logo on notifications with the website logo?
Is it possible to subscribe to notifications when surfing in incognito mode or with private browsing (e.g. on Chrome, Firefox)?
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?
What can you do if a user blocks the notifications on your website by clicking the "Block" button in the permission prompt? How can you reset that choice? How can you display the permission prompt again?
If you are implementing web push notifications on a website you should be familiar with the concept of endpoint.
The first thing to do in order to subscribe a user to notifications is to ask for permission.
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.
When you need to send events from you application server (backend) there are various technologies that you can use.
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.
Sometimes it is useful to send a notification from your website to multiple users. Let's see how to achieve that.
"Web Push Notifications" is a general term to refer to the push notifications sent by websites and web apps. However, if you are looking for an official document that defines the "Web Push Notifications" standard, you won't find it. This is because this technology is made up of different technologies, each one serving to a specific purpose. Let's find out what these technologies are and where the official standards are located (documentation).
Are web push notifications a good technology for privacy?
If you are a beginner with web push notifications, you may wonder what happens to the notifications sent when the client is offline or the device is turned off. What is the behavior of the notifications in this case? Do they get delivered or are they lost?
When you send a web push notification, you need to set the TTL: what is it? What value should you use? This article describes the TTL and the best practices for setting its value.
How to prevent the browser notifications from automatically closing? Is there any way to increase the amount of time the notifications are displayed in foreground to the user?
There are different ways to control the beep / sound made by web push notifications.
In order to send push notifications from a website to a browser, you need to use a push service, as defined by the W3C Push API: let's see a list of push services for the major browsers and how they work.
Brave is a privacy-focused browser, with a small market share, and you may be surprised to learn that it supports web push notifications.
This article describes a simple and effective method for debugging web push notifications on a specific browser using Pushpad.
The standard for web push notifications (Push API) is now available on iOS and Safari. You can read more about the history of this feature on Safari in this blog post, which has received multiple updates, from the first rumors in 2021 to the release of the feature on iOS in 2023.
In this article we see a frequent use case for notifications, where you want to send a notification only to the users in your database that match a specific condition.
I've seen this question several times, so I would like to give a definitive answer.
This is not an extensive article, but just some brief notes about PostgreSQL limitations. Finding the culprit of performance issues in not easy and these limitations were found during months of research.
Now Pushpad supports the silent option for web push notifications. This means that you can send web push notifications that don't produce any sound or vibration when they are received.
Let's say that you have sent a notification to a recipient and then you want to remove it: how can you do that?
Subscribing users to web push notifications on your website is not enough: you also need to manage and renew their push subscriptions properly over time, otherwise you will lose subscribers.
When you hear "web push" you probably think about notifications... but that is not necessary true. In theory, the web push technology could be used for delivering messages or updates to the web app, without displaying a notification to a user.
On some browsers, the permission prompt for notifications can be displayed only after a user interaction with the website. Let's see why some browsers enforce this rule, what happens if you don't comply with it and how can you implement a solution that works across all major browsers.
Chrome 84 will fight abusive notifications. Let's see what you should do to stay complaint and avoid the penalization.
Browsing the web, you may have noticed that most websites use a double opt-in process for subscribing the users to notifications. Basically these websites first show a custom prompt (designed with HTML / CSS) that asks you if you are interested in the notifications, then, when you click the subscribe button, they display another prompt (with native appearance) asking you if you really want to allow the notifications from the website. Isn't one prompt enough?
Are you wondering what is the maximum length of text that you can include in your web notifications?
It's easy to create segments based on the user preferred language. In this way you can send different notifications to users with different language preferences.
There are many reasons to add a service worker to Wordpress: for example you may want to improve caching or add web push notifications. Let's see how to do that.
Why some web push notifications are not delivered to the browser? Why some notifications are not displayed to the user?
Would you like to send web push notifications only to people located in a given place? If you use Pushpad you can implement that in different ways.
Are you stuck with an old version of the service worker or your imported scripts are not being updated as you expect? This guide shows you how to ensure that your service worker and the imported scripts are updated in a timely manner.
Now you can use Pushpad for delivering time-sensitive messages. For example you can notify urgent alerts or incoming phone calls.
What if you want to send a web push notification only to 10% of your users? This can be useful for example for testing and for measuring CTR for that notification before sending it to all your users. There are many ways to achieve that, but in this tutorial we will show a simple method with tags.
Back in 2015 the first product that we launched was Pushpad Express. Then in the next years we have developed and launched a new product, called Pushpad Pro. Pushpad Pro has proven to be absolutely the best product and offers a lot of advantages compared to Express: that is why we have decided to stop supporting Pushpad Express. **All project that use Pushpad Express must move to Pushpad Pro before 1st February 2019.** After that date all project that use Pushpad Express will be removed.
Usually the prompt for web push notifications is displayed only once, the first time that the user visits a website. What if the user blocks the notifications? Is there a way to show the notifications prompt when the user visits the website again?
This article investigates one of the reasons that negatively impact delivery rates for web push. First it shows that web push subscriptions can last many years without expiring, then it proves a negative correlation between the age of a web push subscription and its expected delivery rate.
There are various reasons that can prevent a web push notification from being delivered. One of them is the presence of subscriptions that are no longer in use: if a device / browser is no longer used, then its subscription to web push notifications is still valid, but the notification won't be delivered. That legacy subscription will eventually expire and will be removed automatically (by Pushpad), but this can take several months, depending on the browser push service (e.g. Google FCM, Mozilla autopush, etc.).
You can use web push notifications to re-engage your users in many different ways. For example you can send transactional notifications to specific users when something happen or you can send large campaigns to all your subscribers. However in this tutorial we show a way to send notifications specifically to users who become inactive.
Forcing the user to subscribe to push notifications is probably not a good choice for most websites. However there are some specific situations where it makes sense to do that.
You can change your notification preferences for a website at any time. You can allow or block the notifications using the browser preferences:
Many developers have asked if they can use Pushpad for sending push notifications to their hybrid mobile apps. Basically they want to **use the W3C Push API inside a WebView**. That would make sense, because a WebView is a sort of browser embedded inside an application.
Safari on iOS supports web push notifications starting from iOS v16.4 (released in 2023). Previous versions did not support web push notifications.
Recently a customer has asked:
Web push notifications have more features and are much cheaper compared to traditional SMS. They are generally the best choice for online businesses. However they have a drawback **for physical stores: it can be hard to make the user subscribe**. For SMS it is much easier: you just need to collect the phone number through a form (e.g. using paper). For web push is different: **you need to tell the user to visit a given website in order to subscribe**. Or... **you can use QR codes!**
Microsoft has just announced that the latest version of Edge supports the Push API.
You can use the Push API to send timely notifications from your website (the notifications are delivered even when the user is not on your website). If you use Pushpad, a service for web push notifications, it is very simple to set the time when the notification must be delivered.
As you may already know, you can use Pushpad to collect metrics about the delivery of web push notifications. We have recently updated the docs with more detailed information, so you can [check them out](https://pushpad.xyz/docs/monitoring).
Sometimes an event can be triggered very frequently. However you want to send a notification to the user only once in a period of time: for example you may want to notify the event with at most one notification every hour (or day, etc.).
If you have problems with web push or with other service worker based technologies on Firefox, then you probably want to use the Firefox developer tools for debugging.
If your website uses Pushpad for web push notifications is very easy to create a NPS survey with a high rate of responses.
Do you want to send a welcome message when a user subscribes to your web push notifications? Here's how to create welcome notifications using Pushpad Pro.
You can use web push notifications to create welcome series for the new users that sign up to your application. Let's see how to create a welcome series using Pushpad.
Many issues related to web push notifications can be solved by simply resetting the browser permission. That removes the old browser subscription and creates a new subscription.
If you currently use a service different from Pushpad and you want to migrate your existing web push subscribers to Pushpad you can follow these steps:
In the last months we have rolled out new notification features and other performance improvements.
This tutorial explains how to add web push notifications to a domain and to all its subdomains using Pushpad.
Some kinds of applications may create a lot of push notifications in a small amount of time.
A customer has recently asked if they could use SVG images as the notification icon. Unfortunately the answer is no at the moment because of browser support.
I would like to reply to an interesting [question](https://stackoverflow.com/questions/44714507/how-to-send-single-user-targeted-notification-with-web-push-api) that has been posted on StackOverflow. I reply here because the original question has been deleted.
Is it possible to transfer web push subscriptions to a different domain / web push service?
We've all been there: you have built a great web app, optimized for mobile, but you have to build a native or hybrid web app just to send push notifications.
If you work with the Push API or service workers in general you know that debugging can be a pain. Fortunately Chrome has two hidden gems that can save you many headaches.
We're happy to announce that Pushpad now supports **VAPID** (Voluntary Application Server Identification for Web Push).
Pushpad fully supports **Unicode** characters and **emoji**.
Today we have deployed a new version of Pushpad which improves deliverability of push notifications and make it easier to find and debug any delivery failure.
Opera has just added support for push notifications.
If you are struggling with the error above, but all your icons of the push package are of the correct size, you have probably set the **wrong DPI**.
Many browsers can deliver push notifications even when a website is closed. Learn how to choose which websites are allowed to send you push notifications.
We have made a change to Pushpad in order to make its use more intuitive.
On 28 September 2016 we have changed how the _icon\_url_ of the Pushpad API works.
Pushpad offers a free tier, but it's not a free service. So why should you prefer a paid service to a free one?
These days we have investigated an issue related to Safari.
APNs an GCM have always provided a way to send notifications in batch.
Pushpad is a service for web push notifications. In order to add push notifications to their websites, **our customers need to install the service worker that we provide on their websites**.
In this tutorial we'll see how to add push notifications to your Wordpress blog. Notifications are **real push notifications**, meaning that they are delivered even when the user is not on your website. This way you can re-engage users when you publish new contents.
The working draft of the Push API currently doesn't offer a good way to manage unsubscriptions.