How to simultaneously edit one html code from two different PCs?

Question

css

I am engaged in layout, html, css, js. I have friends with whom we work together. Sometimes you have to edit or help them do something. For example, he does not know how to do it, and I, in order to save time, will do some piece of work quickly.
So, the question is how can two Internet users edit a file at the same time, without delays, and without having to update the file again after each save of the document. Interested in the principle of Google Dosc, I would like to somehow work in the same way.
At the moment, I use Dropbox as a storage, but after each file save, I have to wait until the document is updated, and this is not convenient.
Interested in all methods, except for git, since I can’t figure it out yet, unfortunately

Answer 1

People had a task - joint development. They came up with a handy tool - vcs (git). The layout designer DmitriySin faced the same task - and he goes against the system, not recognizing anything, complicating his life with dropboxes, conflicts and everything else. Seemingly. what could be easier than a program with two text fields and one button?

Answer 2

It's easier to deal with Git. If you are not working through the command line, there is a program with a graphical interface on Github.com.

Answer 3

TeamViewer for such tasks.
Well, you definitely need to know git, but in this case you need TeamViewer.