In your web application, the Web Workers specification specifies an API for spawning background scripts. Web Workers allow you to run long-running scripts to conduct computationally heavy activities without obstructing the user interface or other scripts that manage user interactions.
Web Workers allows you to conduct a script operation in a background thread separate from the web application's main execution thread. The benefit is that time-consuming processing can be done in a separate thread, freeing up the main thread (typically the UI) to run without being slowed down.
A web worker is a JavaScript that works in the background, independent of other scripts, and has no impact on the page's performance. While the web worker is running in the background, you can continue to do whatever you want: click, select objects, etc.
Extended-running scripts are not interrupted by scripts that respond to clicks or other user events, and long tasks can be completed without yielding in order to maintain the page responsive.
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