CSS box-shadow vs drop-shadow | Freelance JAMstack Developer
Safari - jQuery dragging with “filter: drop-shadow()” leaves traces - jQuery Forum
CSS Box-Shadow vs Drop-Shadow Filter - YouTube
Josh W. Comeau on Twitter: "🔥 `filter: drop-shadow` is the gift that keeps on giving. With `box-shadow`, one sibling's shadow can cast over another, breaking the 3D illusion. By putting `drop-shadow` on
See @diegohaz's Tweet on Twitter / Twitter
filter: drop-shadow() Archives - Brian Treese
box-shadow & drop-shadow
CSS Shadows: A Deep Dive Part 3 - The CSS3 Filter Function - developersink
html - Make CSS filter: drop-shadow() goes through others elements - Stack Overflow