Example Karabiner Elements setup for Vim navigation keys using Hyper+h/j/k/l

karabiner.json

{
    "global": {
        "check_for_updates_on_startup": true,
        "show_in_menu_bar": true,
        "show_profile_name_in_menu_bar": false
    },
    "profiles": [
        {
            "complex_modifications": {
                "parameters": {
                    "basic.to_if_alone_timeout_milliseconds": 1000
                },
                "rules": [
                    {
                        "description": "Change Hyper + H/J/K/L to Arrow Keys, X to forward delete",
                        "manipulators": [
                            {
                                "from": {
                                    "key_code": "h",
                                    "modifiers": {
                                        "mandatory": [
                                            "left_shift",
                                            "left_command",
                                            "left_control",
                                            "left_option"
                                        ],
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "left_arrow"
                                    }
                                ],
                                "type": "basic"
                            },
                            {
                                "from": {
                                    "key_code": "j",
                                    "modifiers": {
                                        "mandatory": [
                                            "left_shift",
                                            "left_command",
                                            "left_control",
                                            "left_option"
                                        ],
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "down_arrow"
                                    }
                                ],
                                "type": "basic"
                            },
                            {
                                "from": {
                                    "key_code": "k",
                                    "modifiers": {
                                        "mandatory": [
                                            "left_shift",
                                            "left_command",
                                            "left_control",
                                            "left_option"
                                        ],
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "up_arrow"
                                    }
                                ],
                                "type": "basic"
                            },
                            {
                                "from": {
                                    "key_code": "l",
                                    "modifiers": {
                                        "mandatory": [
                                            "left_shift",
                                            "left_command",
                                            "left_control",
                                            "left_option"
                                        ],
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "right_arrow"
                                    }
                                ],
                                "type": "basic"
                            },
                            {
                                "from": {
                                    "key_code": "x",
                                    "modifiers": {
                                        "mandatory": [
                                            "left_shift",
                                            "left_command",
                                            "left_control",
                                            "left_option"
                                        ],
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "delete_forward"
                                    }
                                ],
                                "type": "basic"
                            }
                        ]
                    },
                    {
                        "description": "Change Fn + Hyper + H/J/K/L to Home / Page Down / Page Up / End",
                        "manipulators": [
                            {
                                "from": {
                                    "key_code": "h",
                                    "modifiers": {
                                        "mandatory": [
                                            "fn",
                                            "left_shift",
                                            "left_command",
                                            "left_control",
                                            "left_option"
                                        ],
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "home"
                                    }
                                ],
                                "type": "basic"
                            },
                            {
                                "from": {
                                    "key_code": "j",
                                    "modifiers": {
                                        "mandatory": [
                                            "fn",
                                            "left_shift",
                                            "left_command",
                                            "left_control",
                                            "left_option"
                                        ],
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "page_down"
                                    }
                                ],
                                "type": "basic"
                            },
                            {
                                "from": {
                                    "key_code": "k",
                                    "modifiers": {
                                        "mandatory": [
                                            "fn",
                                            "left_shift",
                                            "left_command",
                                            "left_control",
                                            "left_option"
                                        ],
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "page_up"
                                    }
                                ],
                                "type": "basic"
                            },
                            {
                                "from": {
                                    "key_code": "l",
                                    "modifiers": {
                                        "mandatory": [
                                            "fn",
                                            "left_shift",
                                            "left_command",
                                            "left_control",
                                            "left_option"
                                        ],
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "end"
                                    }
                                ],
                                "type": "basic"
                            }
                        ]
                    },
                    {
                        "manipulators": [
                            {
                                "description": "Tab as fn",
                                "from": {
                                    "key_code": "tab",
                                    "modifiers": {
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "fn"
                                    }
                                ],
                                "to_if_alone": [
                                    {
                                        "key_code": "tab"
                                    }
                                ],
                                "type": "basic"
                            }
                        ]
                    },
                    {
                        "manipulators": [
                            {
                                "description": "Change caps_lock to command+control+option+shift.",
                                "from": {
                                    "key_code": "caps_lock",
                                    "modifiers": {
                                        "optional": [
                                            "any"
                                        ]
                                    }
                                },
                                "to": [
                                    {
                                        "key_code": "left_shift",
                                        "modifiers": [
                                            "left_command",
                                            "left_control",
                                            "left_option"
                                        ]
                                    }
                                ],
                                "to_if_alone": [
                                    {
                                        "key_code": "escape",
                                        "modifiers": {
                                            "optional": [
                                                "any"
                                            ]
                                        }
                                    }
                                ],
                                "type": "basic"
                            }
                        ]
                    }
                ]
            },
            "devices": [
                {
                    "disable_built_in_keyboard_if_exists": false,
                    "identifiers": {
                        "is_keyboard": true,
                        "is_pointing_device": false,
                        "product_id": 610,
                        "vendor_id": 1452
                    },
                    "ignore": false
                },
                {
                    "disable_built_in_keyboard_if_exists": false,
                    "identifiers": {
                        "is_keyboard": true,
                        "is_pointing_device": false,
                        "product_id": 597,
                        "vendor_id": 1452
                    },
                    "ignore": false
                }
            ],
            "fn_function_keys": {
                "f1": "vk_consumer_brightness_down",
                "f10": "mute",
                "f11": "volume_down",
                "f12": "volume_up",
                "f2": "vk_consumer_brightness_up",
                "f3": "vk_mission_control",
                "f4": "vk_launchpad",
                "f5": "vk_consumer_illumination_down",
                "f6": "vk_consumer_illumination_up",
                "f7": "vk_consumer_previous",
                "f8": "vk_consumer_play",
                "f9": "vk_consumer_next"
            },
            "name": "Default profile",
            "one_to_many_mappings": {},
            "selected": true,
            "simple_modifications": {},
            "standalone_keys": {},
            "virtual_hid_keyboard": {
                "caps_lock_delay_milliseconds": 0,
                "keyboard_type": "ansi",
                "standalone_keys_delay_milliseconds": 200
            }
        },
        {
            "complex_modifications": {
                "parameters": {
                    "basic.to_if_alone_timeout_milliseconds": 1000
                },
                "rules": []
            },
            "devices": [],
            "fn_function_keys": {
                "f1": "display_brightness_decrement",
                "f10": "mute",
                "f11": "volume_decrement",
                "f12": "volume_increment",
                "f2": "display_brightness_increment",
                "f3": "mission_control",
                "f4": "launchpad",
                "f5": "illumination_decrement",
                "f6": "illumination_increment",
                "f7": "rewind",
                "f8": "play_or_pause",
                "f9": "fastforward"
            },
            "name": "No mapping",
            "selected": false,
            "simple_modifications": {},
            "virtual_hid_keyboard": {
                "caps_lock_delay_milliseconds": 0,
                "keyboard_type": "ansi"
            }
        }
    ]
}