Web APIsLesson 59Free preview

Web Workers API

This lesson is part of HTML · All levels

Summary

Web Worker allows JavaScript to run on separate background threads so heavy tasks like computing don't freeze the page view. Worker is created with a new constructor and communicates via an interthread message using postMessage. It keeps the user experience smooth despite the heavy process.

Key points

Web Worker runs the script in a separate background thread
Made with new Worker("skrip.js")
Communication using postMessage and event message
Worker can't access the DOM page directly

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