How to track information on a site if it only runs normally in a browser?

Question

JavaScript

I have an Angular website with websockets. Those. All data arrives in a protected form and it is almost impossible to figure it out there. I want to make an application that will open this site in a browser environment and use Javascript to search for the desired element on the page. Once every 30 minutes, the page will be updated just in case. And checking the desired element every 5 minutes. What is the easiest way to do this and how?
I plan to send notifications in telegram.

Answer 1

selenium or headless chrome
Inject your code into the page, it does what it does, and sends the data to your application, which sends it to telegram, or wherever you need it.

Answer 2

https://nwjs.io

Answer 3

The chrome extension is just fuck, I've done this a hundred times