Enable additional layers when holding multiple keys?

[sinewave]

Hi,

I found your repo while looking for an easier way to edit my Karabiner config :). Over time, I've built it up, and it works great. However, updating or tweaking it is extremely tedious, which discourages me from using it.

Discovering your repo has reinvigorated me 😂

I have a question: Is it possible to have layers stack upon each other? For example, my current config works like this:

1. Holding down "space" enables a nav/command layer of sorts e.g. "j" -> "left", "l" -> "right", etc..
2. Building on this, holding down "space" + "f" enables a different layer which acts adds "Cmd" e.g. pressing and holding "space" + "f" and then pressing "j/k" moves word left/right instead of character left.
3. Lastly, holding "space" + "f" +"a" enables yet another layer which adds Shift e.g. holding "space" + "f" + "a" and pressing "j/k" now selects word left/right

Wondering if something like this is supported? Happy to share my config if that's helpful but it's way over 3k lines 😄.

[evan-liu]

Hi @sinewave, thanks for trying the project, glad it is helpful.

Please try if this works for you:

layer('␣').manipulators([
  withModifier('??')({
    j: toKey('←'),
    l: toKey('→'),

    f: toKey('‹⌘'),
    a: toKey('‹⇧'),
  }),
])

BTW I do it in a very similar way myself.

[sinewave]

Hi @evan-liu, tku for the quick response!

Could you explain what withModfier('??') does?

I might be misunderstanding but believe my setup functions differently in that it has four modes (or layers) activated by holding specific keys:

• Holding "space" activates the home_row_mode
• Holding "space" AND "f" activates command_mode
• Holding "space" AND "s" activates control_mode
• Holding "space" AND "a" activates shift_mode

Each mode changes the key mappings on the right half of the keyboard. For example, in home_row_mode "j" or "l" moves character left or right whereas in "command_mode" pressing "j" or "l" moves word left or right and in shift_mode pressing "j" or "l" selects word left or right.

I've pasted in my config below to illustrate, which runs 2,800 lines 😩

{
  "description": "_Tony Home Row Mode [Spacebar as Trigger Key]",
  "manipulators": [
    {
      "type": "basic",
      "from": {
        "key_code": "spacebar",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "set_variable": {
            "name": "home_row_mode",
            "value": 1
          }
        }
      ],
      "to_if_alone": [
        {
          "key_code": "spacebar"
        }
      ],
      "to_after_key_up": [
        {
          "set_variable": {
            "name": "home_row_mode",
            "value": 0
          }
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "f",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "set_variable": {
            "name": "option_mode",
            "value": 1
          }
        }
      ],
      "to_if_alone": [
        {
          "key_code": "v",
          "modifiers": [
            "left_command"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "set_variable": {
            "name": "option_mode",
            "value": 0
          }
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "d",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "set_variable": {
            "name": "command_mode",
            "value": 1
          }
        }
      ],
      "to_if_alone": [
        {
          "key_code": "c",
          "modifiers": [
            "left_command"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "set_variable": {
            "name": "command_mode",
            "value": 0
          }
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "s",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "set_variable": {
            "name": "control_mode",
            "value": 1
          }
        }
      ],
      "to_if_alone": [
        {
          "key_code": "x",
          "modifiers": [
            "left_command"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "set_variable": {
            "name": "control_mode",
            "value": 0
          }
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "w",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "set_variable": {
            "name": "control_mode",
            "value": 1
          }
        }
      ],
      "to_if_alone": [
        {
          "key_code": "w",
          "modifiers": [
            "left_option"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "set_variable": {
            "name": "control_mode",
            "value": 0
          }
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "a",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "set_variable": {
            "name": "shift_mode",
            "value": 1
          }
        }
      ],
      "to_if_alone": [
        {
          "key_code": "vk_none"
        }
      ],
      "to_after_key_up": [
        {
          "set_variable": {
            "name": "shift_mode",
            "value": 0
          }
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "i",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "up_arrow"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "j",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "left_arrow"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "k",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "down_arrow"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "l",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "right_arrow"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "i",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "up_arrow",
          "modifiers": [
            "left_shift"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "key_code": "vk_none"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 1
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "j",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "left_arrow",
          "modifiers": [
            "left_shift"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "key_code": "vk_none"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 1
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "k",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "down_arrow",
          "modifiers": [
            "left_shift"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "key_code": "vk_none"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 1
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "l",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "right_arrow",
          "modifiers": [
            "left_shift"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "key_code": "vk_none"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 1
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "j",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "left_arrow",
          "modifiers": [
            "left_option",
            "left_shift"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "key_code": "vk_none"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 1
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "l",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "right_arrow",
          "modifiers": [
            "left_option",
            "left_shift"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "key_code": "vk_none"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 1
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "k",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "down_arrow",
          "modifiers": [
            "left_option",
            "left_shift"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "key_code": "vk_none"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 1
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "i",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "up_arrow",
          "modifiers": [
            "left_option",
            "left_shift"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "key_code": "vk_none"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 1
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "j",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "left_arrow",
          "modifiers": [
            "left_option"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "key_code": "vk_none"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "k",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "down_arrow",
          "modifiers": [
            "left_option"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "key_code": "vk_none"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "l",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "right_arrow",
          "modifiers": [
            "left_option"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "key_code": "vk_none"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "i",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "up_arrow",
          "modifiers": [
            "left_option"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "key_code": "vk_none"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "j",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "left_arrow",
          "modifiers": [
            "left_command"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "key_code": "vk_none"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "k",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "down_arrow",
          "modifiers": [
            "left_command"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "key_code": "vk_none"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "l",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "right_arrow",
          "modifiers": [
            "left_command"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "key_code": "vk_none"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "i",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "up_arrow",
          "modifiers": [
            "left_command"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "key_code": "vk_none"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "j",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "left_arrow",
          "modifiers": [
            "left_command",
            "left_shift"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "key_code": "vk_none"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 1
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "k",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "down_arrow",
          "modifiers": [
            "left_command",
            "left_shift"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "key_code": "vk_none"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 1
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "l",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "right_arrow",
          "modifiers": [
            "left_command",
            "left_shift"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "key_code": "vk_none"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 1
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "i",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "up_arrow",
          "modifiers": [
            "left_command",
            "left_shift"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "key_code": "vk_none"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 1
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "j",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "left_arrow",
          "modifiers": [
            "left_control"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "key_code": "vk_none"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "k",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "down_arrow",
          "modifiers": [
            "left_control"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "key_code": "vk_none"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "l",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "right_arrow",
          "modifiers": [
            "left_control"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "key_code": "vk_none"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "i",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "up_arrow",
          "modifiers": [
            "left_control"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "key_code": "vk_none"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "j",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "left_arrow",
          "modifiers": [
            "left_control",
            "left_shift"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "key_code": "vk_none"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 1
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "k",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "down_arrow",
          "modifiers": [
            "left_control",
            "left_shift"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "key_code": "vk_none"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 1
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "l",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "right_arrow",
          "modifiers": [
            "left_control",
            "left_shift"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "key_code": "vk_none"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 1
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "i",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "up_arrow",
          "modifiers": [
            "left_control",
            "left_shift"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "key_code": "vk_none"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 1
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "j",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "left_arrow",
          "modifiers": [
            "left_option",
            "left_command"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "key_code": "vk_none"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "k",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "down_arrow",
          "modifiers": [
            "left_option",
            "left_command"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "key_code": "vk_none"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "l",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "right_arrow",
          "modifiers": [
            "left_option",
            "left_command"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "key_code": "vk_none"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "i",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "up_arrow",
          "modifiers": [
            "left_option",
            "left_command"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "key_code": "vk_none"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "description": "Hold spacebar and press h to undo",
      "type": "basic",
      "from": {
        "key_code": "h",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "z",
          "modifiers": [
            "left_command"
          ]
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "description": "Hold spacebar and a and press h to redo",
      "type": "basic",
      "from": {
        "key_code": "h",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "z",
          "modifiers": [
            "left_command",
            "left_shift"
          ]
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 1
        }
      ]
    },
    {
      "description": "Hold spacebar and press y to redo",
      "type": "basic",
      "from": {
        "key_code": "y",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "z",
          "modifiers": [
            "left_command",
            "left_shift"
          ]
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "m",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "tab"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "m",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "tab",
          "modifiers": [
            "left_shift"
          ]
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 1
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "m",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "tab",
          "modifiers": [
            "left_command"
          ]
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "m",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "tab",
          "modifiers": [
            "left_command",
            "left_shift"
          ]
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 1
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "e",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "escape"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "delete_or_backspace",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "delete_forward"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "u",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "delete_or_backspace",
          "modifiers": [
            "left_option"
          ]
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "u",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "delete_or_backspace",
          "modifiers": [
            "left_command"
          ]
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "o",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "delete_forward",
          "modifiers": [
            "left_option"
          ]
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "o",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "k",
          "modifiers": [
            "left_control"
          ]
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "r",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "return_or_enter"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "r"
      },
      "to": [
        {
          "key_code": "return_or_enter",
          "modifiers": [
            "left_control"
          ]
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "u",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "delete_or_backspace"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "o",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "key_code": "delete_forward"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "n"
      },
      "to": [
        {
          "key_code": "spacebar"
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "option_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "control_mode",
          "value": 0
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 0
        }
      ]
    },
    {
      "type": "basic",
      "from": {
        "key_code": "caps_lock"
      },
      "to": [
        {
          "key_code": "left_control"
        }
      ]
    }
  ]
}

[evan-liu]

withModfier('??') means for each key mapping, add optional: any as modifiers. Which means all the modifiers in from will pass to to.

• Press ␣ to activate the layer (and hold)
• Press a to activate ⌘ (and hold)
• Press s to activate ⇧ (and hold)
• Press j (map to ↓) will trigger ↓ ⌘ ⇧

[sinewave]

Wow, that seems like magic!!!

Would you mind elaborating on how this works as I'm still a little confused :)

Would love to understand it better so I can customize e.g.

1. In this line f: toKey('‹⌘'), what does "‹" do?
2. In my config, I can also hold "space" and press (and release) "d" to send "Cmd-c" to copy and press (and release) "f" to send "Cmd-v". Do you know how I would do that using this approach.
3. How would I accomplish triggering a different layer when holding ␣ and r e.g. pressing j would send a keyboard shortcut that moves my active window to the left monitor, using a separate app, which is mapped to "Ctrl-Shift-4"

[sinewave]

Ahh, got it. Is there a way recreate the original config by activating another layer from within a layer e.g. "space" activates the home_row_mode layer and then pressing and holding another key activates a different layer? Perhaps using ifVar() similar to how my current config works?

Alternatively, do you think it would work to remove withModifier('??') and manually map each of the modifier combinations. Then use "to_if_alone" to trigger different "d" behaviors similar to how this works in my current config? Is that supported inside a layer?

I looked at duoLayer() or simLayer() but I don't believe those would work as they use simultaneous presses. If possible, it would be great to consider a new kind of multiLayer() or variation of duoLayer() that doesn't require simultaneous key presses.

{
      "type": "basic",
      "from": {
        "key_code": "d",
        "modifiers": {
          "optional": [
            "caps_lock"
          ]
        }
      },
      "to": [
        {
          "set_variable": {
            "name": "command_mode",
            "value": 1
          }
        }
      ],
      "to_if_alone": [
        {
          "key_code": "c",
          "modifiers": [
            "left_command"
          ]
        }
      ],
      "to_after_key_up": [
        {
          "set_variable": {
            "name": "command_mode",
            "value": 0
          }
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        }
      ]
    }

[evan-liu]

layer('␣', 'home_row_mode').manipulators([
  map('d')
    .toVar('command_mode')
    .toAfterKeyUp(toSetVar('command_mode', 0))
    .toIfAlone(toKey('c', '⌘')),

  withCondition(ifVar('command_mode'))([
    //... home_row_mode + command_mode
  ]),
])

[sinewave]

Thx again for your help, I'm back at it this weekend trying to finish this up!

I've made good progress and have all the individual modes working however I've run into an issue trying to check for multiple modes, which I can't get to work e.g. check for multiple values to get Cmd+Shift+Left to work.

Here's my current code:

  // home_row_mode - activated by holding "space" bar
  // new version using variables to activate different modes
  layer('␣', 'home_row_mode').manipulators([

    map('d')
      .toVar('command_mode')
      .toAfterKeyUp(toSetVar('command_mode', 0))
      .toIfAlone(toKey('c', '⌘')),
  
    withCondition(ifVar('command_mode'))([
      {
        j: toKey('←', '⌘'),
        l: toKey('→', '⌘'),
        i: toKey('↑', '⌘'),
        k: toKey('↓', '⌘'),
        u: toKey('delete_or_backspace', '⌘'),
        o: toKey('delete_forward', '⌃'),
        r: toKey('return_or_enter', '⌘'),
        m: toKey('tab', '⌘'),
      },
    ]),

    map('f')
      .toVar('option_mode')
      .toAfterKeyUp(toSetVar('option_mode', 0))
      .toIfAlone(toKey('v', '⌘')),
  
    withCondition(ifVar('option_mode'))([
      {
        j: toKey('←', '⌥'),
        l: toKey('→', '⌥'),
        i: toKey('↑', '⌥'),
        k: toKey('↓', '⌥'),
        u: toKey('delete_or_backspace', '⌥'),
        o: toKey('delete_forward', '⌥'),
        r: toKey('return_or_enter', '⌥'),
        m: toKey('tab', '⌥'),
      }
    ]),

    map('a')
      .toVar('shift_mode')
      .toAfterKeyUp(toSetVar('shift_mode', 0)),
      // .toIfAlone(toKey('shift')),
  
    withCondition(ifVar('shift_mode'))([
      {
        j: toKey('←', '⇧'),
        l: toKey('→', '⇧'),
        i: toKey('↑', '⇧'),
        k: toKey('↓', '⇧'),
        u: toKey('delete_or_backspace', '⇧'),
        o: toKey('delete_forward', '⇧'),
        r: toKey('return_or_enter', '⇧'),
        m: toKey('tab', '⇧'),
      }
    ]),

    // this doesn’t work --- is there another way to check if multiple values are set?
    withCondition(ifVar('command_mode','shift_mode'))([
      {
        j: toKey('←', '⌘⇧'),
        l: toKey('→', '⌘⇧'),
        i: toKey('↑', '⌘⇧'),
        k: toKey('↓', '⌘⇧'),
        u: toKey('delete_or_backspace', '⌘⇧'),
        o: toKey('delete_forward', '⌘⇧'),
        r: toKey('return_or_enter', '⌘⇧'),
        m: toKey('tab', '⌘⇧'),
      }
    ]),

    {
      j: toKey('←'),
      l: toKey('→'),
      i: toKey('↑'),
      k: toKey('↓'),
      u: toKey('delete_or_backspace'),
      o: toKey('delete_forward'),
      r: toKey('return_or_enter'),
      m: toKey('tab'),
      //h: toKey('z')
    }
  ])

Is is possible to check if multiple values are set? Chat-GPT suggested this but it didn't seem to work 😆

    // Example of potentially nested withCondition usage
    withCondition(ifVar('command_mode'))([
      withCondition(ifVar('shift_mode'))([
      {
        j: toKey('←', '⌘⇧'),
      // additional mappings with both 'command_mode' and 'shift_mode' true
      }
      ])
    ]),

[evan-liu]

Try

  withCondition(ifVar('command_mode'), ifVar('shift_mode'))([ 

[sinewave]

Thx, it looks like that inserts a check for multiple conditions!

    {
      "type": "basic",
      "from": {
        "key_code": "j"
      },
      "to": [
        {
          "key_code": "left_arrow",
          "modifiers": [
            "command",
            "shift"
          ]
        }
      ],
      "conditions": [
        {
          "type": "variable_if",
          "name": "command_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "shift_mode",
          "value": 1
        },
        {
          "type": "variable_if",
          "name": "home_row_mode",
          "value": 1
        }
      ]
    }

However, I'm still not able to trigger '⌘⇧←' by holding spacebar+d+a and pressing j. Instead it sends '⌘←'. It seems like holding both d and a isn't setting both variables to 1?

Here's what I've tried so far with no luck:

Using just the withCondition() function, not sure if that's even supported though:

withCondition(ifVar('shift_mode'))([
      {
        j: toKey('←', '⇧'),
        l: toKey('→', '⇧'),
        i: toKey('↑', '⇧'),
        k: toKey('↓', '⇧'),
        u: toKey('delete_or_backspace', '⇧'),
        o: toKey('delete_forward', '⇧'),
        r: toKey('return_or_enter', '⇧'),
        m: toKey('tab', '⇧'),
      }
    ]),

I thought I could then use the map() function but couldn’t figure out how to use multiple keys?

So I then tried using mapSimultaneous() -- no luck.

    mapSimultaneous(['d','a'])
    .toVar('command_mode')  
    .toVar('shift_mode'),
    withCondition(ifVar('command_mode'), ifVar('shift_mode'))([ 
      {
        j: toKey('←', '⌘⇧'),
        l: toKey('→', '⌘⇧'),
        i: toKey('↑', '⌘⇧'),
        k: toKey('↓', '⌘⇧'),
        u: toKey('delete_or_backspace', '⌘⇧'),
        o: toKey('delete_forward', '⌘⇧'),
        r: toKey('return_or_enter', '⌘⇧'),
        m: toKey('tab', '⌘⇧'),
      }
    ]),

[evan-liu]

1. Please check the variables in Karabiner-EventViewer to see if all variables are set as expected.
2. Karabiner-Elements run the first rule it found then stop. So try to move rules with more conditions above those with fewer conditions.

[sinewave]

1. OK, that did it - using your library, I have now rewritten my entire 3k config into something that easy to understand, manage and build upon 🚀 🚀 💯

THANK YOU for all your help and for creating such an awesome, helpful tool 🙏 🙏

[kayg04]

Hey, apologies to revive this topic here but I have the opposite problem.

When I am in one layer, I don't want another layer to get activated. All my layers are hyperLayer() and I define them in functions and call them in alphabetical order. I find that the layers first called are the ones that are able to use all alphabetical keys while the layers called after the first layer are unable to use the specific key used to activate the first layer.

For example, I have a yabaiLayer() that is Hyper + Y to activate the layer, then any key press is associated with an action. Before that, I have a raycastLayer() that's activated by Hyper + R.

If I press, Hyper + Y + R, the action associated with R inside yabaiLayer() is never executed, rather raycastLayer() is stacked on top of yabaiLayer().

[evan-liu]

Hi, @kayg04. Please discuss your issue at #142