Key Up (Branch 4476) เสร็จแล้ว
✨ นายนพวรรณ ปักอินทรีย์
<html> <head> <title>Let's Start</title> <style> :root { --h: 0; --l: 50; } body { background: hsl(var(--h), 100%, calc(1% * var(--l))); } </style> </head> <body> <script type="text/javascript"> let h = 0; let l = 50; document.body.onkeyup = function (e) { console.log(e); switch (e.keyCode) { case 40: document.documentElement.style.setProperty("--l", (l -= 10)); break; case 38: document.documentElement.style.setProperty("--l", (l += 10)); break; case 39: document.documentElement.style.setProperty("--h", (h += 10)); break; case 37: document.documentElement.style.setProperty("--h", (h -= 10)); break; } }; </script> </body> </html>