Change behaviour of FN keys based on foremost application using use_fkeys_as_standard_function_keys

[yermandy]

Hello, is it possible to change the behavior of FN keys based on the frontmost application?

Before v15.3.0, I had to manually set display_brightness_decrement -> f1 if a certain application was active.

Something like this:

"manipulators": [
{
    "conditions": [
        {
            "bundle_identifiers": [
                "com.microsoft.VSCode"
            ],
            "type": "frontmost_application_if"
        }
    ],
    "from": {
        "key_code": "f1",
        "modifiers": {
            "mandatory": [
                "fn"
            ]
        }
    },
    "to": [
        {
            "consumer_key_code": "display_brightness_decrement"
        }
    ],
    "type": "basic"
},
{
    "conditions": [
        {
            "bundle_identifiers": [
                "com.microsoft.VSCode"
            ],
            "type": "frontmost_application_if"
        }
    ],
    "from": {
        "key_code": "f1",
        "modifiers": {
            "optional": [
                "any"
            ]
        }
    },
    "to": [
        {
            "key_code": "f1"
        }
    ],
    "type": "basic"
}

With the new version, this approach does not work anymore. Now, I can see that there is a variable system.use_fkeys_as_standard_function_keys

Can I change the behavior of all FN keys to be (F1, F2, ...., F12) when com.microsoft.VSCode is the frontmost application using system.use_fkeys_as_standard_function_keys?

Thank you!

[lukewlms]

Yes, here's how I now have this set up:

{
    "description": "VS Code Function keys work as Fn keys",
    "manipulators": [
        {
            "conditions": [
                {
                    "file_paths": ["Visual Studio Code\\.app" ],
                    "type": "frontmost_application_if"
                }
            ],
            "from": {
                "key_code": "f1",
                "modifiers": { "optional": ["any"] }
            },
            "to": [
                {
                    "key_code": "f1",
                    "modifiers": "fn"
                }
            ],
            "type": "basic"
        },
        {
            "conditions": [
                {
                    "file_paths": ["Visual Studio Code\\.app" ],
                    "type": "frontmost_application_if"
                }
            ],
            "from": { "key_code": "f2" },
            "to": [
                {
                    "key_code": "f2",
                    "modifiers": "fn"
                }
            ],
            "type": "basic"
        },

[tekezo]

Details about the function key are documented here:
https://karabiner-elements.pqrs.org/docs/help/how-to/function-keys/

[yermandy]

Thank you, fixed it using the example Swap f12 and volume_increment in Google Chrome, even though, for f5 and f6 it did not work