sindresorhus/emittery

Health v2 · maintenance only

Adoption not part of the score

2073 stars · 83 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Emittery is a small, zero-dependency JavaScript library providing an async-first event emitter with strongly typed events, async iteration, AbortSignal cancellation, and lifecycle hooks. It works in Node.js and bundled browser environments as a modern alternative to EventEmitter.

Use cases

• emit events asynchronously without blocking the event loop
• typed event emitter for TypeScript projects
• subscribe to events with async iteration for-await-of
• cancel event subscriptions with AbortSignal
• lazy setup and teardown of listener resources
• pub/sub communication between app components

When to choose

• you want an async, promise-based event emitter instead of Node's EventEmitter
• you need TypeScript-typed events with zero dependencies
• you need async iteration or cancellation support in your event system

When to avoid

• you need synchronous event dispatch with guaranteed immediate listener execution
• you need cross-process or distributed pub/sub messaging
• your environment cannot use ES modules or bundlers

Facets

library · maturity stable

middleware developer-tools developer-tools web-development backend frontend browser event-emitter pubsub async promise typescript zero-dependency observer-pattern nodejs javascript

Member repositories

For agents

markdown · JSON · MCP: product_card(name="sindresorhus/emittery")