Toggle input sources (English or Japanese) by shift + space in Karabiner-Elements

README.md

How to use

1. Copy this "shift_space_input_source.json" to ~/.config/karabiner/assets/complex_modifications/
2. Karabiner-Elements -> Preferences -> Complex Modifications -> Add rule -> Enable "Toggle input sources (English or Japanese) by shift + space"

shift_space_input_source.json

{
  "title": "Toggle input sources (English or Japanese) by shift + space",
  "rules": [
    {
      "description": "Toggle input sources (English or Japanese) by shift + space",
      "manipulators": [
        {
          "conditions": [
            {
              "type": "input_source_if",
              "input_sources": [
                {
                  "language": "ja"
                }
              ]
            }
          ],
          "type": "basic",
          "from": {
            "key_code": "spacebar",
            "modifiers": {
              "mandatory": [
                "shift"
              ]
            }
          },
          "to": [
            {
              "key_code": "japanese_eisuu"
            }
          ]
        },
        {
          "conditions": [
            {
              "type": "input_source_unless",
              "input_sources": [
                {
                  "language": "ja"
                }
              ]
            }
          ],
          "type": "basic",
          "from": {
            "key_code": "spacebar",
            "modifiers": {
              "mandatory": [
                "shift"
              ]
            }
          },
          "to": [
            {
              "key_code": "japanese_kana"
            }
          ]
        }
      ]
    }
  ]
}