I have a Firebase user with a photoURL value set.

The Firebase docs say the photoURL property has a string | null value.

Now I want to remove the photoURL, so I thought I could set it to null using the Web v9 modular SDK.

But this does not work:

updateProfile(auth.currentUser, { photoURL: null });

However this does work:

updateProfile(auth.currentUser, { photoURL: '' });

If I use an empty string Firebase will convert it to null afterwards. But I can't directly set it to null.

Is this a feature or a bug?