Keydown hanlder for multikeys pressed

multi-key-handler.js

document.addEventListener('keydown', multiKeyHandler)
const keyMap = {}

function multiKeyHandler (e) {
  if (e.ctrlKey) {
    keyMap['ctrlKey'] = clearTimeout()
    keyMap['ctrlKey'] = setTimeout(() => delete keyMap['ctrlKey'], 1500)
  }
  if (e.altKey) {
    keyMap['altKey'] = clearTimeout()
    keyMap['altKey'] = setTimeout(() => delete keyMap['altKey'], 1500)
  }
  if (e.code === 'KeyV') {
    keyMap['v'] = clearTimeout()
    keyMap['v'] = setTimeout(() => delete keyMap['v'], 1500)
  }
  if (e.code === 'KeyR') {
    keyMap['r'] = clearTimeout()
    keyMap['r'] = setTimeout(() => delete keyMap['r'], 1500)
  }

  if (keyMap['ctrlKey'] && keyMap['altKey'] && keyMap['v'] && keyMap['r']) {
    Object.keys(keyMap).forEach(key => {
      keyMap[key] = clearTimeout()
    })
    // KEYS CTRL+ALT+V+R pressed together
  }
}