Ensure your CSS won't be discarded by IE 9 and below because of crazy stylesheets limitation of legacy IE.
a CSS selector compiler/engine
CSS selector engine supporting jQuery selectors
Powerful and compliant CSS selector parser.
Ensure CSS selectors are unique.
A CSS parser, transformer, and minifier written in Rust
Minify selectors with PostCSS.
Use Custom Selectors in CSS
Selectors decision tree - choose matching selectors, fast
Merge CSS rules with PostCSS.
Fast CSS Selectors API Engine
A query library for ECMAScript AST using a CSS selector like query language.
PostCSS plugin to transform :not() W3C CSS level 4 pseudo class to :not() CSS level 3 selectors
Calculate specificity of a CSS Selector
Fast CSS Selectors API Engine
Resolve a nested selector in a PostCSS AST
A rule for stylelint to disallow unused selectors
Create a style element with CSS properties, filtering input using a allowlist or blocklist
Full CSS support for JSX without compromises
Safe defaults for cssnano which require minimal configuration.
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
Selectors for Redux.
Parses and stringifies CSS selectors
A helper to expand CSS selectors into PostHTML matcher objects