ProseMirror editor state

Core Inquirer prompt API

A parallel (swimlanes) timelines D3 chart for representing state of time-series over time.

A useState replacement that batches state updates to requestAnimationFrame, coalescing rapid updates (scroll / resize / pointer / animation) to at most one render per frame

Editor state data structures for the CodeMirror code editor

Does a JS type have a getter/setter property

ECMAScript (ESTree) AST walker

Tiny, simple, and robust technique for defining and acting with local states

Yjs encoding protocols

Library to walk OAS 3 schema objects and call a callback

A Zustand utility that extends your store with built-in set and reset functions, enabling effortless state updates and resets in React applications.

[type-definitions]: https://github.com/jestjs/jest/blob/main/packages/jest-types/src/Circus.ts

Properties on which you can listen for changes

Finite State Machines and Statecharts for the Modern Web.

A custom element for extending the native media elements (<audio> or <video>)

Validate request properties against an OpenAPI spec.

A simple utility to set the state for your data

Enter/exit a state

Lightweight Proxy-free React state management. Direct mutations, tracked array methods, built-in undo/redo time travel, cross-tab sync, atomic transactions, and localStorage persistence. Zero dependencies, ~2KB, TypeScript-first.

Lightweight Babel AST traversal