Individual skill
web-workers-pro
Offload work with Web Workers: dedicated/shared workers, messaging, transferables, and worker-based architectures. Use to keep the main thread responsive.
skills/web-workers-pro/SKILL.md
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# Web Workers Pro
A practical guide to Web Workers: moving heavy computation off the main thread — dedicated and shared workers, message passing, transferable objects, and the architectures (comlink, worker pools) that make workers pleasant.
## Overview
JavaScript's main thread does everything: rendering, input, your code. A long task (>50ms) blocks interaction — jank. **Web Workers** run scripts in background threads with no DOM access, communicating via message passing. Use them for: parsing/processing large data, image/video manipulation, encryption, search indexing, heavy calculations. If the main thread is busy, workers are the answer.
## When to use
- Heavy data processing (CSV/JSON parsing, transformations, aggregations).
- Image/audio/video processing client-side.
- Crypto, compression, WASM-adjacent compute.
- Search indexes (Lunr/FlexSearch) over large corpora.