html - Why does box-shadow look different than filter: drop-shadow - Stack Overflow
Breaking down CSS Box Shadow vs. Drop Shadow | CSS-Tricks - CSS-Tricks
Text shadows, image shadows and css filters.
box-shadowだけじゃない!CSSでできる色々な影の表現と意外に知らない落とし穴 - ICS MEDIA
Haz on Twitter: "Here's a nice trick to create drop shadows on containers with overflow elements like arrows. Instead of using the CSS box-shadow property, you can use: filter: drop-shadow(0 3px 3px
CSS { In Real Life } | Drop-Shadow: The Underrated CSS Filter
filter | Codrops
html - Make CSS filter: drop-shadow() goes through others elements - Stack Overflow