threads.js is a JavaScript worker thread library and asynchronous task orchestrator designed to offload CPU-intensive tasks to background threads. It functions as a cross-platform worker pool and a TypeScript worker runner that automatically transpiles and executes TypeScript files within separate threads.
The project distinguishes itself by providing a unified worker API that allows for cross-platform execution across different JavaScript environments. It includes a specialized worker data serialization tool to pass complex class instances and binary data between threads, and supports inlining worker source code as binary blobs.
The library covers a broad range of capabilities including thread pool management, concurrency control, and task cancellation. It also provides mechanisms for binary data transfer via memory buffers, worker error propagation with stack traces, and code sandboxing for isolating security-critical logic.