Useful CSS custom functions using the new @function rule

CSS color - Resolve and convert CSS colors.

two functions: One that returns true, one that returns false

List of standard and browser specific CSS functions.

A CSS parser, transformer, and minifier written in Rust

Shape utilities for Material Components for the web

BezierEasing provides Cubic Bezier Curve easing which generalizes easing functions exactly like in CSS Transitions.

The custom `sort` method (mobile-first / desktop-first) of CSS media queries for `postcss-sort-media-queries`, `css-mqpacker` or `pleeease` (which uses css-mqpacker) or, perhaps, something else ))

Use Custom Media Queries in CSS

Normalize CSS animation/transition timing functions.

A mighty CSS linter that helps you avoid errors and enforce conventions.

TailwindCSS v4.0 compatible replacement for `tailwindcss-animate`.

Use Custom Properties Queries in CSS

a CSS selector compiler/engine

Use round, rem and mod functions in CSS

Use Custom Selectors in CSS

Open Web data by the Mozilla Developer Network

Utilities for working with htmlparser2's dom

Use pow(), sqrt(), hypot(), log(), exp() exponential functions in CSS

A lightweight React Hook intended mainly for AI chat applications, for smoothly sticking to bottom of messages