How to implement simple push notifications on the site?

Question

JavaScript

You need a simple one. For now, you just need to enable site users to subscribe to site notifications:

And collect subscribers. And then we will decide what we will send to them and when.
Can this be implemented simply in JS yourself, or is it better to use third-party services? What are their advantages? I want to send PUSH notifications only in the browser.
Site on WordPress, but not an article, if that.

Answer 1

Vot

Answer 2

prgssr.ru/development/sozdaem-service-worker.html - first read, understand the principle
https://firebase.google.com/docs/cloud-messaging/j... - use this.

Answer 3

I tried different things, settled on sendpulso - mega-flexible, works everywhere and for free