Can you please make the brightness and volume change actually work?

Please make the brightness and volume change actually work on [the website](https://deri-kurniawan.vercel.app). (BTW, I found out that it's possible by changing the volume and brightness on [this website](https://chrishtu.github.io/windows11). And you can ask @chrishtu (the creator of the website) how to make [the website](https://deri-kurniawan.vercel.app) have that same feature).