提供了一个命令行选择器的类，以及对应的方法，和对应的使用示例。
> Selector parser with built in methods for working with selector strings.
npm query parser and tools
hast utility to create an element from a simple CSS selector
Determine selector specificity with postcss-selector-parser
A CSS selector engine.
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Powerful and compliant CSS selector parser.
PostCSS plugin to transform :not() W3C CSS level 4 pseudo class to :not() CSS level 3 selectors
use querySelector syntax to search for nodes inside of (nested) shadow roots
a CSS selector parser
Resolve nested CSS selectors
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PostCSS plugin for CSS Modules to pass arbitrary values between your module files
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React useContextSelector hook in userland
Standalone CSS Selector Finder and Parser.
Fast CSS Selectors API Engine
Parses and stringifies CSS selectors
Fast CSS Selectors API Engine
A CSS-inspired language to select, sequence, and compose DOM events.
Calculate specificity of a CSS Selector
A BEM linter for postcss
Prefix all CSS rules with a selector