Hammerspoon snippet to manipulate window position/size with a shortcut

init.lua

-- GRID
-- hs.window.animationDuration=0.1;
local hotkey = require "hs.hotkey"
local grid = require "hs.grid"

grid.MARGINX = 0
grid.MARGINY = 0
grid.GRIDHEIGHT = 3
grid.GRIDWIDTH = 3

local mod_resize = {"alt"}
local mod_move = {"alt", "shift"}

hotkey.bind(mod_resize, 'm', grid.maximizeWindow)

-- Move Window
hotkey.bind(mod_move, 'k', grid.pushWindowDown)
hotkey.bind(mod_move, 'i', grid.pushWindowUp)
hotkey.bind(mod_move, 'j', grid.pushWindowLeft)
hotkey.bind(mod_move, 'l', grid.pushWindowRight)

-- Resize Window
hotkey.bind(mod_resize, 'i', grid.resizeWindowShorter)
hotkey.bind(mod_resize, 'k', grid.resizeWindowTaller)
hotkey.bind(mod_resize, 'l', grid.resizeWindowWider)
hotkey.bind(mod_resize, 'j', grid.resizeWindowThinner)


hs.hotkey.bind({"alt"}, "B", function()
  local win = hs.window.focusedWindow()
  local f = win:frame()
  local screen = win:screen()
  local max = screen:frame()

  f.x = max.x
  f.y = max.y
  f.w = max.w / 2
  f.h = max.h
  win:setFrame(f)
end)

hs.hotkey.bind({"alt"}, "N", function()
  local win = hs.window.focusedWindow()
  local f = win:frame()
  local screen = win:screen()
  local max = screen:frame()

  f.x = max.x + (max.w / 2)
  f.y = max.y
  f.w = max.w / 2
  f.h = max.h
  win:setFrame(f)
end)