We use the Object.hasOwn function in various JavaScript files, but it's currently not being polyfilled for older browsers that don't implement it.

In at least one reported case, the missing function breaks the external links editor (causing it to be stuck on "Loading..."), but it almost certainly causes other unknown breakages elsewhere.

Related Sentry issue: https://sentry.metabrainz.org/organizations/metabrainz/issues/382/