konami code as one-liner and tricky for fun

konami.beautify.js

(
  (a, ks = '38384040373937396665', e = document.body, k = 0) =>
  e.addEventListener('keydown', ke =>
    +ks.slice(k*2,k*2+2) === ke.keyCode
    ? ++k >= ks.length/2
      ? a(e,k = 0)
      : null
    : k = 0
  )
)(x => x.style.fontFamily = 'monospace')

konami.js

((a, ks='38384040373937396665', e=document.body, k=0) => e.addEventListener('keydown', ke => +ks.slice(k*2,k*2+2)===ke.keyCode ? ++k>=ks.length/2 ? a(e,k=0) : null : k=0))(x=>x.style.fontFamily='monospace')