importScripts() method of the
WorkerGlobalScope interface synchronously imports one or more scripts into the worker's scope.
importScripts(path0) importScripts(path0, path1) importScripts(path0, path1, /* …, */ pathN)
A string value representing the URL of the script to be imported. The URL may be absolute or relative. If the URL is relative, it is relative to the HTML document's base URL.
If you had some functionality written in a separate script called
foo.js that you wanted to use inside worker.js, you could import it using the following line:
self.importScripts() are effectively equivalent — both represent
importScripts() being called from inside the worker's inner scope.
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