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I would like to map Ctrl + Delete on a Windows keyboard to Fn + Opt + Delete on a Macbook keyboard, so it deletes the next word after the cursor.

I can't figure out how to represent Fn + Opt + Delete in the json, how would I modify the following?

{
    "conditions": [{"type": "frontmost_application_unless", "bundle_identifiers": ["^com\\.sublimetext\\.3$"]}],
    "from": {"key_code": "delete_forward", "modifiers": {"mandatory": ["left_control"]}},
    "to": /* What should I put here? */,
    "type": "basic"
}
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Fn is usually evaluated within the keyboard, before transmission. It doesn't generate its own event.

According to Key Codes, Fn Opt ⌥ Backspace ⌫ generates this data...

Key Down
    Characters: 
    Unicode:        63272 / 0xf728
    Keys:       ⌥⌦
    Key Code:   117 / 0x75
    Modifiers:  8913216 / 0x880140 ⓘ

Maybe you could use that to initiate the replacement - I don't use Karabiner so can't test.

*Characters:  doesn't actually generate any printable character on my machine.

  • Hm I think 0x75 is just delete_forward in Karabiner, which is Fn + Delete, but need a way to represent Fn + Opt + Delete somehow. – simonzack Jul 20 at 13:40
  • It clearly shows opt/forward delete... which is what you actually generate if you hit Fn/opt/back delete. You need to include the modifier code to get the entire command.Get Key Codes (freeware) & try it out for yourself. – Tetsujin Jul 20 at 13:43
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Was actually quite obvious, I have no idea why I didn't try to obvious solution. Took me a couple days to figure it out. All I needed to do was add the Opt/Alt modifier.

{
    "conditions": [{"type": "frontmost_application_unless", "bundle_identifiers": [
        "^com\\.sublimetext\\.3$",
        "^com\\.google\\.Chrome$",
        "^com\\.jetbrains\\.pycharm$"
    ]}],
    "from": {"key_code": "delete_forward", "modifiers": {"mandatory": ["left_control"]}},
    "to": [{"key_code": "delete_forward", "modifiers": ["left_alt"]}],
    "type": "basic"
}

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