Zero-touch build-time injection of stable testID / data-testid for React Native (Expo) and Next.js. Frontend writes nothing; QA automation (Appium, Playwright) gets stable selectors.

SWC plugin that automatically adds unique data-testid attributes to every React JSX element at build time — stable selectors for Playwright, Cypress and Testing Library, including per-item ids inside .map() loops. Zero config.

Selectors for Redux.

Shared utilities for the SessionSight SDKs (PII redaction, stable selectors, visitor-id handling).

a CSS selector compiler/engine

Ensure CSS selectors are unique.

A query library for ECMAScript AST using a CSS selector like query language.

Use Custom Selectors in CSS

Powerful and compliant CSS selector parser.

Minify selectors with PostCSS.

Calculate specificity of a CSS Selector

CSS selector engine supporting jQuery selectors

CSS Selector Generator

PostCSS plugin to transform :not() W3C CSS level 4 pseudo class to :not() CSS level 3 selectors

Fast CSS Selectors API Engine

Selectors decision tree - choose matching selectors, fast

Fast CSS Selectors API Engine

deterministic JSON.stringify() with custom sorting to get deterministic hashes from stringified results

A CSS parser, transformer, and minifier written in Rust

Merge CSS rules with PostCSS.