Resize i3wm/Sway window panes with the keyboard, independently of which pane has focus

i3-resize.sh

#!/usr/bin/env bash

# Usage: i3-resize.sh <direction> [<px or ppt size>]
#
# For i3wm (X11) and Sway (Wayland)
#
# Resize i3wm/Sway window panes with the keyboard, independently of which pane has focus.
# This is similar to resizing with the mouse: moving left always goes left, moving down always goes down, etc.
#
# Floating windows are resized from the bottom right corner.
#
# Dependency: jq
#
# Key bindings example:
#      # "$mod" to move to, "$mod+Shift" to move, "$mod+Control" to resize
#      bindsym $mod+Control+Left  $exec i3-resize.sh left  3 px or 3 ppt
#      bindsym $mod+Control+Down  $exec i3-resize.sh down  3 px or 3 ppt
#      bindsym $mod+Control+Up    $exec i3-resize.sh up    3 px or 3 ppt
#      bindsym $mod+Control+Right $exec i3-resize.sh right 3 px or 3 ppt
#
# Links:
#      https://gist.github.com/willemw12
#      https://i3wm.org
#      https://swaywm.org/

dir="${1:?direction argument is missing}"
shift

# Avoid small resize steps for floating windows by ignoring <px or ppt size>,
# which is also done in the default config example (move floating window).
if [[ "$XDG_SESSION_TYPE" = "wayland" ]]; then
  if [[ "$(swaymsg -t get_tree | jq -r '..|try select(.focused == true).type == "floating_con"')" = "true" ]]; then
    ARGS=()
  else
    ARGS=("$@")
  fi

  msgcmd=swaymsg
else
  if [[ "$(i3-msg -t get_tree | jq -r '..|try select(.focused == true).floating')" =~ _on$ ]]; then
    ARGS=()
  else
    ARGS=("$@")
  fi

  msgcmd=i3-msg
fi

case "${dir,,}" in
  left)  $msgcmd --quiet resize shrink right "${ARGS[@]}" || $msgcmd --quiet resize grow left   "${ARGS[@]}";;
  down)  $msgcmd --quiet resize grow down    "${ARGS[@]}" || $msgcmd --quiet resize shrink up   "${ARGS[@]}";;
  up)    $msgcmd --quiet resize shrink down  "${ARGS[@]}" || $msgcmd --quiet resize grow up     "${ARGS[@]}";;
  right) $msgcmd --quiet resize grow right   "${ARGS[@]}" || $msgcmd --quiet resize shrink left "${ARGS[@]}";;
  *)     exit 3
esac