elegant JavaScript keyboard shortcut binder

bindi.js

(() => {
  function makeBindi(keys) {
    return new Proxy({}, {
      get(_, key) {
        return makeBindi([...keys, key])
      },
      set(_, key, func) {
        document.addEventListener('keydown', e => {
          if (
            (e.key.toLowerCase() === key) &&
            (keys.includes("alt") ? e.altKey : true) &&
            (keys.includes("shift") ? e.shiftKey : true) &&
            (keys.includes("ctrl") ? e.ctrlKey : true)
          ) func(e)
        })
        return true
      },
    })
  }
  window.bindi = new Proxy({}, {
    get(_, key) {
      return makeBindi([key])
    },
  })
})()

usage.js

window.bindi.ctrl.shift.v = e => alert("hii")

window.bindi.ctrl.y = e => alert("yanked it")