use querySelector syntax to search for nodes inside of (nested) shadow roots

A CSS-inspired language to select, sequence, and compose DOM events.

React Element Selector Query (resq) - Query React components and children by selector (component name)

Parses and stringifies CSS selectors

Resolve a nested selector in a PostCSS AST

npm query parser and tools

For a given DOM element, find the first ancestor that matches a given CSS selector.

PostCSS plugin for CSS Modules to pass arbitrary values between your module files

PostCSS plugin to transform :matches() W3C CSS pseudo class to more compatible CSS selectors

A library for one-to-many cross-origin communication between Window contexts, built on the postMessage API.

hast utility for `querySelector`, `querySelectorAll`, and `matches`

Better typed `querySelector` and `querySelectorAll`.

Selectors decision tree - choose matching selectors, fast

Calculate specificity of a CSS Selector

CSS Selector Generator

mjml-head-html-attributes

Custom node-sass importer for selector specific imports, node importing, module importing, globbing support and importing files only once

A suite of parsers and compilers for WordPress styles.

Use cascade layers in CSS

Selectors for Redux.