WhatsApp Web possible over distance?

Suppose I connected my cell phone to Whatsapp Web and forgot it somewhere, for example from a friend. If it is connected to the Internet, can I also send / receive messages from my laptop via my PC or does the phone have to be in the same WLAN?

As long as the phone is on and has internet, you can access WhatsApp Web from anywhere in the world.

Yes, it works. I also used the web portal at work while my cell phone was at home.

Whatsapp web can be started at any time. But you get a message on your phone that WhatsApp Web is active. And then you can log out on all devices

Have tried it. Right.

Then it says "Whatsapp Web is active".

I've already noticed it, but somehow never really processed it.

How can we use it… How can I scan the code While we are in a distance by each other?