Documentation of what is and is not supported

[robyoung]

Where can I find details of what is supported? I can see that basic navigation is supported but, for example, when I try to close a fold with zc nothing happens. I would like to find out if this unsupported by the library or unsupported by the client I'm using.

[eldoy]

https://github.com/replit/codemirror-vim/blob/master/src/vim.js