Toggle modifier key

[spaceunifyfifty]

Feature Request Type

• Core functionality
• Add-on hardware support (eg. audio, RGB, OLED screen, etc.)
• Alteration (enhancement/optimization) of existing feature(s)
• New behavior

Description

What I want is very simple. It's infuriating that this exists no where else online yet. I've seen others post about it.

I want modifier keys like shift to behave like caps lock in that they are toggled on by tapping, indefinitely, until they are tapped again to toggle off. So I can tap shift, which would now simulate shift held throughout all time and all future key presses, enabling me to do things like pressing arrow keys multiple times to expand out a text selection (since shift must be active while pressing arrow keys to select text), and then when I tap shift again, it would toggle off.

Is there a way to do this currently with A) vial.rocks or B) karabiner-elements or C) handwriting code?

[tzarc]

Basically all of this is doable using the APIs here: https://docs.qmk.fm/feature_macros#advanced-macro-functions

Register on first press, unregister on second. Either look at the mods as per the info panel, or keep a Boolean state and handle it yourself so that it's immune from normal shift/ctrl etc. keypresses.

[filterpaper]

The Caps Word feature can also achieve the same thing with tweaks.

[spaceunifyfifty]

Thanks! I've looked at that, and I think it's a bit too technically involved and risky for where I'm at currently. Still, I think this is a simple enough feature that lots of people might want if it were easy to setup, so I've opened a thread on getting this supported into one of the GUI frontend editors if anyone is interested https://feedback.vial.today/suggestions/676507/modifier-toggles-aka-everyshotmodifier