Connect spotify as part of this app. Study Spotify's API and see how a chrome extension can handle it.
Designate the main soundtrack (Youtube, Spotify). When user plays another video (i.e. Youtube tutorial), the main audio is dampened to the user-chosen sound level. Provides users a constant stream of music while allowing it to switch to BGM mode when necessary.
- What if the secondary video (i.e. tutorial) already has BGM?
https://codepen.io/inupurnomo/pen/MWWRmQr
https://freefrontend.com/jquery-buttons/
Smiley range slider: https://codepen.io/aaroniker/pen/wxZPyK
bunch of amazing button collections: https://fdossena.com/?p=html5cool/buttons/i.frag
cool reveal button: https://codepen.io/juliepark/pen/yjOQmV
Animated Mute Button: https://codepen.io/aaroniker/pen/abbmMaW
how satisfied are you? (range slider): https://codepen.io/veronicadev/pen/dejxmY
more satisfied icon thing.. https://codepen.io/YahiaRefaiea/pen/bMRaqr