✓ 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
Solid physics and data display with correct Archimedes values, but the slider is a custom drag widget (not a native range input) that can lose focus during drag, crowns teleport rather than animate smoothly into water, and splash fires only once on first entry rather than on each immersion event.
Solid physics and data display with correct Archimedes values, but the slider is a custom drag widget (not a native range input) that can lose focus during drag, crowns teleport rather than animate smoothly into water, and splash fires only once on first entry rather than on each immersion event.