Best idiomatic way to have a per-app layer?

[kenNash]

I'd like to activate a “Tab Switcher Mode” per-app, with tab.
I mean: in any app, tab should activate a layer with the key combos used for tab-switching in that particular app.
In other words, I'd like to be able to use, e.g., tab+right_arrow for next tab whatever it means in any app (where there are tabs).

[evan-liu]

There is no "best idiomatic way", but here is one option:

layer('⇥').manipulators([
  withCondition(ifApp('^some.app.id$'))([
    // Some special mapping
  ]),

  // Pre/Next tab in most apps, put in the last
  {
    '←': toKey('[', '⌘⇧'),
    '→': toKey(']', '⌘⇧'),
  }
])

[kenNash]

Thank you @evan-liu.
What if I want to put together different apps? This doesn't work (frankly, I didn't expect it would have…):

withCondition(
        ifApp('^com.google.Chrome$') || // For the first app put here it works
        ifApp('^com.apple.Safari$').        // for the second one it doesn't
      )

[evan-liu]

ifApp('RegExp') takes a RegExp string, so you can try to make it match all the apps you want to cover.

[kenNash]

Great! 🙏