JS runs multiple times creating performance issue

Patch https://www.drupal.org/project/addtocalendar/issues/3251589#comment-1435... 🐛 JS runs multiple times creating performance issue Needs work is applied successfully.
Before

After applying patch

If we're removing js/addtocalendar.js from the library definition, we should delete that file as well.

I'm not 100% sure that's the right move though. What happens if something with an addtocalendar field gets loaded on the page through ajax? (Say an ajax View that shows Event nodes). Does the addtocalendar js run correctly with this patch? Or without the patch? I don't personally know. That's definitely something we would need to investigate before committing anything related to this issue.