useWorker is a React Hook for running expensive computations in background threads without blocking the user interface.
The tool solves the problem of long-running JavaScript tasks freezing the UI by offloading them to Web Workers. It wraps the Web Worker API in a React Hook that accepts a function and returns a callable interface. Instead of managing event-based messaging, developers work with Promises, making the API more intuitive within React's declarative paradigm. The hook handles worker lifecycle management, including garbage collection of worker instances when they are no longer needed.
The tool suits React projects that need to perform computationally intensive operations—sorting large datasets, parsing files, or processing data—while keeping the interface responsive. It is particularly valuable for Create React App users who want to use Web Workers without ejecting and modifying webpack configuration. The library includes options for setting timeouts, loading remote dependencies into the worker context, and transferring objects efficiently. Anyone adopting it should understand that Web Workers have inherent limitations around what can be serialized and passed between threads, and the documentation explicitly covers these constraints.
The project maintains a clear roadmap with completed features including worker termination, reactive status tracking, timeout handling, and support for both remote and local script imports. Several planned features remain unimplemented, including a multi-worker hook variant and a file-based worker hook.
