✓ Two crowns ✓ Same mass, different density — Vertical slider ✓ Slider works ✓ Slider controls crowns — Slider direction correct ✓ Full slider range — Fall animation ✓ Water displacement ✓ Rising water level ✓ Splash effects ✓ Physics correct ✓ Live mass value ✓ Live volume value ✓ Live density value ✓ Live displaced water ✓ Gilded displaces more ✓ Heureka animation ✓ No external deps ✓ Light bg / dark text ✓ Self-contained HTML
Horizontal (not vertical) slider; both crowns move to identical Y positions so there's no visual differentiation between them, and the "fall animation" is just linear position interpolation with no inertia or distinct drop event.
Horizontal (not vertical) slider; both crowns move to identical Y positions so there's no visual differentiation between them, and the "fall animation" is just linear position interpolation with no inertia or distinct drop event.