my only concern with this is...with a web worker, my understanding was that any dependencies to the web worker would be loaded separately from the actual UI thr

my only concern with this is...with a web worker, my understanding was that any dependencies to the web worker would be loaded separately from the actual UI thread, which means you could potentially be loading your javascript twice if you have the same code being used in the UI thread as your web worker thread. At least, that is how it worked a few years ago.