Karabiner-elements: Double tap shift toggle caps lock

[edygar]

Is there anyway to set double tap shift to toggle caps lock?

(Currently, I've a remap of my caps lock to esc, but rarely I miss the ability to toggle caps mode)

[tekezo]

369

[nomasprime]

Hi @tekezo, I looked at the issue you referenced but can't find anything about implementing double-tap. I'd like to map double-tap left shift to ESC.

[trusktr]

So how do we do double tap on a key? #369 doesn't exactly say.

[nguyenhimself]

You can accomplish this by using variables. The docs has an example. It works well for me.

[ZhengkunWang]

I figure it out by this , double tap left shift to switch cap_lock

{
      "description": "double left shift to cap_lock",
      "manipulators": [
      {
        "type": "basic",
        "from": {
          "key_code": "left_shift",
          "modifiers": {
            "optional": [
              "any"
            ]
          }
        },
        "to": [
          {
            "key_code": "caps_lock"
          }
        ],
        "conditions": [
          {
            "type": "variable_if",
            "name": "left_shift pressed",
            "value": 1
          }
        ]
      },
      {
        "type": "basic",
        "from": {
          "key_code": "left_shift",
          "modifiers": {
            "optional": [
              "any"
            ]
          }
        },
        "to": [
          {
            "set_variable": {
              "name": "left_shift pressed",
              "value": 1
            }
          },
          {
            "key_code": "left_shift"
          }
        ],
        "to_delayed_action": {
          "to_if_invoked": [
            {
              "set_variable": {
                "name": "left_shift pressed",
                "value": 0
              }
            }
          ],
          "to_if_canceled": [
            {
              "set_variable": {
                "name": "left_shift pressed",
                "value": 0
              }
            }
          ]
        }
      }
    ]
  }

[harmtemolder]

I figure it out by this , double tap left shift to switch cap_lock

{
...
  }

Just in case anyone reads this and wants to change the time in which you need to press shift the second time, you can add the basic.to_delayed_action_delay_milliseconds parameter

[marvdm]

@ZhengkunWang Any idea why caps lock will turn on but not off if "modifiers": {"optional": ["any"]} is missing?

[MuhammedZakir]

@ZhengkunWang Any idea why caps lock will turn on but not off if "modifiers": {"optional": ["any"]} is missing?

Caps lock is a modifier key, along with Fn, Control, Alt, Shift, Option and Command. So if you want use a modification even when caps lock is enabled, you will have to explicitly mention caps_lock or any in modifiers.optional. Else, it won't trigger. any means you can use it with any modifier keys. And, if you want a modification to work only when caps lock is enabled, add caps_lock in modifiers.mandatory. The same goes for other modifier keys. See below link for more information.

https://karabiner-elements.pqrs.org/docs/json/complex-modifications-manipulator-definition/from/modifiers/

Tip

If you do not include any in modifiers.optional, your manipulator does not change event if extra modifiers (modifiers which are not included in modifiers.mandatory) are pressed.