When an error happens in the Javascript, the developers should receive a notification

[hoh]

In order to achieve this, I recommend adding Sentry in the application.

The procedure to do this is documented in this guide: https://docs.sentry.io/platforms/javascript/guides/vue/

[BjrInt]

Sentry is blocked by most browser as it is a tracking service. We could try to selfhost a Sentry instance or we'll have to build our own custom solution...