Web Workers
Web Workers
Section titled “Web Workers”Introduction
Section titled “Introduction”Web Workers allow JavaScript to run in a background thread separate from the main execution thread, enabling CPU-intensive operations without blocking the UI.
Topics Covered
Section titled “Topics Covered”- Main Thread — Creating workers and communicating from the main thread
- Worker Thread — Receiving messages and posting results from workers
- Limitations — What workers can and cannot access
- Transferable Objects — Zero-copy data transfer for performance
Learning Objectives
Section titled “Learning Objectives”- Create and communicate with Web Workers
- Understand worker limitations (no DOM access)
- Use transferable objects for large data
Summary
Section titled “Summary”Workers run JS in a separate thread. Communicate via postMessage() and onmessage. No DOM access. Transferable objects for zero-copy data passing.