A utility-first CSS framework for rapidly building custom user interfaces.

A JavaScript library for escaping CSS strings and identifiers while generating the shortest possible ASCII-only output.

Parses and determines if a given CSS Media Query matches a set of values.

A CSS parser, transformer, and minifier written in Rust

Change CSS theme with toggle, buttons or select using CSS Variables and localStorage

State-Driven Styling in JavaScript

Parse CSS media query lists.

A Webpack plugin to optimize \ minimize CSS assets.

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 ))

CSS parser / stringifier

Provides some base functions needed by a css-select adapter so that you don't have to implement the whole thing.

Style form elements when they are empty

Adaptive Cards Javascript library for HTML Clients

Use Custom Media Queries in CSS

A tool set for CSS: fast detailed parser (CSS → AST), walker (AST traversal), generator (AST → CSS) and lexer (validation and matching) based on specs and browser implementations

Salesforce Lightning Design System

Zero-runtime Stylesheets-in-TypeScript

Fast CSS Selectors API Engine

CSS modules support for TypeScript

Minify colors in your CSS files with PostCSS.