andywer/threads.js

Health v2 · maintenance only

Adoption not part of the score

3531 stars · 173 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

threads.js is a TypeScript library that provides a uniform API for spawning and communicating with workers, using web workers in browsers and worker_threads in Node.js. It supports async functions, observables, and thread pools so CPU-intensive tasks can be offloaded with a simple function-call style API.

Use cases

• offload CPU-intensive calculations to worker threads in node.js
• run the same worker code in browsers and node.js
• manage bulk task execution with a thread pool
• keep the UI responsive by moving business logic off the main thread
• use web workers with webpack bundling
• call worker functions as if they were local async functions

When to choose

• you need multithreading that works identically in node.js and the browser
• you want a simple, typed API over raw worker_threads or web workers
• you need thread pools for dispatching many parallel tasks
• your build uses webpack and you want workers bundled transparently

When to avoid

• your workload is I/O-bound rather than CPU-bound (async I/O suffices)
• you need fine-grained control over shared memory or SharedArrayBuffer
• you only target modern node.js and prefer the native worker_threads API directly

Facets

library · maturity stable

concurrency developer-tools developer-tools web-development cross-platform browser worker-threads web-workers thread-pool multithreading isomorphic nodejs electron typescript javascript

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