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Invalid CSS

:wrapped { ... }

The :wrapped selector checks if the element is flex item got “wrapped” and moved to the other row or column.

This one is inspired by Ahmad Shadeed's CSS wishlist.

Explore other not-so-valid CSS things

display: visually-hidden

display: masonry

:stuck { ... }

border-color: gradient(...)

collapsing: none

place: center

font-family: system-font

position-items: center

position: temporal

color: anthracite

float: top

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