Kupola core reactivity engine — Signal, computed, effect, batch.

Shockwave Flash Player component for React

Reactive features for hyperfixi — adds `live`, `bind`, `when X changes`, and `^name` DOM-scoped vars (upstream _hyperscript 0.9.90).

C++ JSI text engine for React Native — @chenglou/pretext's line breaker and pretext-native's font-table metrics, ported to native and exposed as synchronous JSI calls, plus the PretextBlockView single-view text block.

React hooks for value-enhancer.

Cross-library test suite for comparing reactive signal behavior across **15 frameworks** with **163 test cases**.

Uncontrolled form ownership for React and React Native-compatible applications

WebdriverIO reporter used for testreporter.io

Checks if object has an entry.

PHP-style match expressions for JavaScript/TypeScript

Minimal **observable value holder**: **`StateCell<T>`** stores a single value, notifies subscribers on change, and supports functional updates. It is intentionally tiny so views and agents can share UI-facing state without pulling in a full external store

A hook that only updates state if the value has actually changed, with optional deep compare support.

Emulate LINQ syntax to work with Arrays in JS

Calculate diff between two Maps

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Simple, direct state primitives for JavaScript.

A lightweight React utility that provides a real context selector hook. Unlike useContext, it lets components subscribe to only the part of context they need, avoiding unnecessary re-renders for better performance.

WebdriverIO reporter used for testledger.dev integration

In-process model-routing shim with metadata-only journaling and evidence-gated policies.

Cutie extension for working with Object in JavaScript.