Just ran into this online tool called replit that supports multiple programming languages, provides editing capabilities, running and testing your app directly on the website.
You can also import github repos, so as a test I imported one of the finished projects of the tutorials. Since that worked, I went ahead and imported the other tutorials as well - you can find them all here:
https://replit.com/@AdamENagy  Â
The website provides a live view of the app (it seems for user login used in the hubs-browser samples you have to click "Open website") and let you fork the project so you can modify it.
You just have to add the necessary environment variables to the forked project inside the "Secrets" and then you can run your modified project 😀Â
I think this can be a very useful tool for testing things and providing us with a reproducible sample if something does not work as expected.