LCH and Lab color values

The `lch()` and `lab()` color functions are based on the CIE LAB color space, representing colors in a way that closely matches human perception and provides access to a wider spectrum of colors than offered by the usual RGB color space.

CSS 2.1 selectors

Basic CSS selectors including: `*` (universal selector), `>` (child selector), `:first-child`, `:link`, `:visited`, `:active`, `:hover`, `:focus`, `:lang()`, `+` (adjacent sibling selector), `[attr]`, `[attr="val"]`, `[attr~="val"]`, `[attr|="bar"]`, `.foo` (class selector), `#foo` (id selector)

dataset & data-* attributes

Method of applying and accessing custom data to elements.

css at-rule: `@font-face`: src: `format('*-variations')`

css property: --*: `env()`: safe area inset variable `safe-area-inset-bottom`

css property: --*: `env()`: safe area inset variable `safe-area-inset-left`

css property: --*: `env()`: safe area inset variable `safe-area-inset-right`

css property: --*: `env()`: safe area inset variable `safe-area-inset-top`

css property: --*: `env()`: window controls overlay variable `titlebar-area-height`

css property: --*: `env()`: window controls overlay variable `titlebar-area-width`

css property: --*: `env()`: window controls overlay variable `titlebar-area-x`

css property: --*: `env()`: window controls overlay variable `titlebar-area-y`

css property: --*: `var()`

css property: hyphens: hyphenation dictionary for afrikaans (af, af-*)

css property: hyphens: hyphenation dictionary for bulgarian (bg, bg-*)

css property: hyphens: hyphenation dictionary for catalan (ca, ca-*)

css property: hyphens: hyphenation dictionary for croatian (hr, hr-*)

css property: hyphens: hyphenation dictionary for czech (cs, cs-*)

css property: hyphens: hyphenation dictionary for danish (da, da-*)

css property: hyphens: hyphenation dictionary for dutch (nl, nl-*)

css property: hyphens: hyphenation dictionary for english (en, en-*)

css property: hyphens: hyphenation dictionary for esperanto (eo, eo-*)

css property: hyphens: hyphenation dictionary for estonian (et, et-*)

css property: hyphens: hyphenation dictionary for finnish (fi, fi-*)

css property: hyphens: hyphenation dictionary for french (fr, fr-*)

css property: hyphens: hyphenation dictionary for galician (gl, gl-*)

css property: hyphens: hyphenation dictionary for hungarian (hu, hu-*)

css property: hyphens: hyphenation dictionary for icelandic (is, is-*)

css property: hyphens: hyphenation dictionary for italian (it, it-*)

css property: hyphens: hyphenation dictionary for kurmanji (kmr, kmr-*)

css property: hyphens: hyphenation dictionary for latin (la, la-*)

css property: hyphens: hyphenation dictionary for mongolian (mn, mn-*)

css property: hyphens: hyphenation dictionary for polish (pl, pl-*)

css property: hyphens: hyphenation dictionary for russian (ru, ru-*)

css property: hyphens: hyphenation dictionary for slovenian (sl, sl-*)

css property: hyphens: hyphenation dictionary for spanish (es, es-*)

css property: hyphens: hyphenation dictionary for swedish (sv, sv-*)

css property: hyphens: hyphenation dictionary for turkish (tr, tr-*)

css property: hyphens: hyphenation dictionary for ukrainian (uk, uk-*)

css property: hyphens: hyphenation dictionary for welsh (cy, cy-*)

css selector: universal selector (`*`)

css selector: universal selector (`*`): namespaces (`*|*`)

html attribute: `data-*` attributes

javascript operator: exponentiation (`**`)

javascript operator: exponentiation assignment (`x **= y`)

javascript operator: multiplication (`*`)

javascript operator: multiplication assignment (`x *= y`)

javascript operator: `yield*`

regular_expressions: quantifier: `*`, `+`, `?`, `{n}`, `{n,}`, `{n,m}`

javascript statement: export: `export * as namespace`