Proper way to impement home-row mod

[giovannibenussi]

I want to use the home-row mod, but I'm having issues with it when typing fast.
For example, if I add this line:

rule("Letter to Modifiers").manipulators([
    map("j").to("left_shift").toIfAlone("j"),
  ...
])

It works, and I can hold j and it acts like shift. However, I type fast, and when I add more items to the manipulators list besides j, I get a lot of unwanted behavior.

What's the recommended approach to implement the home-row mod?

[evan-liu]

There were some discussions, but no perfect solution yet. However, there is a new feature in Karabiner-Elements that may change that (to.conditions). I will give it another try when I have more time.

[giovannibenussi]

That would be great! I've been missing this feature because I switch between a QMK-compatible keyboard and another that is not compatible, so I would love to use the home-row mod in both 🙌

[gregorias]

Hi, I’ve implemented a fairly faithful implementation of QMK HRM at https://github.com/gregorias/karabiner.ts-greg-mods. It doesn’t lose keys on roll overs and even has permissive hold (to.conditions enable that, like @evan-liu mentions) and chordal hold features. You can check it out.