one crazy workaround because of the weirdness of modern jazz development

Autocorrect of “JS”? If so: it’s not a modern weirdness; this is an old, long-fixed browser bug.

FWIW, JavaScript continues executing after errors in cases where it makes sense. If an event listener throws an error, it doesn’t make much sense for it to stop all future events without crashing the page (which is kind of what IE used to do with its script error message box, and we know how that turned out).