Especially on smartphones it would much easier to edit text and navigate with Vim bindings. I think the Ace Editor and Codemirror support Vim bindings.
Could you open an issue here ( https://github.com/AntouanK/hni-ui/issues ) with a small proposal of how that would work?
I'm re-writing in Elm the front-end for my HN app, so that would be an interesting feature to add.
Edit: I thought you meant navigating the site. You only meant the text editing part though, right?
I'm rewriting it in Elm right now, so I want to avoid any js library.
Also, the HN API doesn't allow auth, so you cannot submit or edit posts from any other app.
But why would you want this? I mean do you write lengthy posts? Or do you post that often?
I can imagine a very small percentage of users would use that feature.
Edit: I thought you meant navigating the site. You only meant the text editing part though, right?