then/promise

Health v2 · maintenance only

Adoption not part of the score

2587 stars · 306 forks observed · 2026-08-28

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

A bare bones Promises/A+ implementation in JavaScript, serving as a superset of ES6 Promises with minimal necessary extensions. It works on both Node.js and browsers (as a polyfill) and offers optional builds for domains, setImmediate, and ES6 extensions.

Use cases

• polyfill promises in older browsers or environments without native ES6 promises
• wrap callback-based async APIs into promises
• implement Promises/A+ compliant async control flow in Node.js
• track and log unhandled promise rejections
• use a lightweight promise library with domains support in Node.js

When to choose

• you need a small, spec-compliant Promises/A+ implementation
• you must support environments lacking native Promise support
• you want a minimal promise library without heavy dependencies

When to avoid

• your runtime already has native ES6 Promises and you need no extensions
• you need advanced async utilities like cancellation or observables
• you want a library with active ongoing feature development

Facets

library · maturity maintenance

concurrency developer-tools developer-tools web-development browser cross-platform promises promises-aplus async polyfill es6 javascript nodejs

Member repositories

For agents

markdown · JSON · MCP: product_card(name="then/promise")