Karabiner-elements long press (long hold) example

README.txt

1. Put this file `~/.config/karabiner/assets/complex_modifications` and edit
2. Open Karabiner-Elements settings
3. Open "Complex Modifications"
4. Click "Add rule"
5. Enable "Demo > Control + R long press"
6. Test it (Hold `Control + R`)

dummy.json

{
    "title": "Demo",
    "rules": [
        {
            "description": "Control + R long press",
            "manipulators": [
                {
                    "type": "basic",
                    "from": {
                        "key_code": "r",
                        "modifiers": {
                            "mandatory": [
                                "control"
                            ]
                        }
                    },
                    "parameters": {
                        "basic.to_if_alone_timeout_milliseconds": 2000,
                        "basic.to_if_held_down_threshold_milliseconds": 2000
                    },
                    "to_if_alone": [
                        {
                            "key_code": "r"
                        }
                    ],
                    "to_if_held_down": [
                        {
                            "shell_command": "open -a 'terminal.app'"
                        }
                    ]
                }
            ]
        }
    ]
}