• A JavaScript script executed from an HTML page that runs in the background, independently of scripts that may also have been executed from the same HTML page. The World Wide Web Consortium (W3C) and the WHATWG envision web workers as long-running scripts that are not interrupted by scripts that respond to clicks or other user interactions. Keeping such workers from being interrupted by user activities allows web pages to remain responsive at the same time as they are running long tasks in the background. ← Wikipedia ↑ webglossary.info/x/w8r

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