Juan Diego Rodríguez

Answering a reader's question about how to create a complex numbering system with CSS list counters.

The text-box-trim property let us specify whether to trim the whitespace above or/and below text

The CSS font-variant-alternates property lets you apply font features picked by the @font-feature-values at-rule, such as style sets, ornaments, and swashes.

The font-variant-emoji property let us define how emoji code points should be displayed, either as an emoji or text.

The @font-feature-values at-rule gives a human-readable name to the font's settings seen in font-feature-settings, such as style sets, ornaments, and swashes.

The font-palette property allows you to pick the color palette of a multi-color font

The @font-palette-values at-rule represents a color palette used in a multi-color font. It lets you pick between the font’s preexisting palettes and change its colors. It can then be applied to elements using the font-palette property.…

The @keyframes at-rule sets the value of properties at different points during an animation, so instead of defining how each property should behave at each frame of an animation, we set its keyframes, and CSS will figure out (i.e., interpolate) the values between them.

HTML 5 Readiness was a site that showed through a rainbow of colors the browser support for several web features. What about a new version?

Sets the stylesheet character encoding. It isn't a proper at-rule, but a byte sequence that says how to decode the stylesheet.