Online editor for collaborative work on code (or text)

Literally just found, I’m in a hurry to share. It's worth it to try and then use in collaboration.
So, click here , in the upper right corner click "New Document", and enter or paste the code. Then the fun begins! We send the link from the address bar to a friend, and he will see our code in the browser. From this moment you can edit simultaneously together, all changes will be reflected almost immediately.

Convenient - there is a highlight of different languages, even python. It seems to me that it is more convenient to do this together with the messenger, agreeing on the changes along the way.

Thing.