useSaveStatus
useSaveStatus():
SaveStatusState
The state of the player’s save, followed as it changes: status is
saved, unsaved, saving or refused; destination says where
the save goes, the platform, this browser or nowhere; size is the
newest record’s size as JSON and gzipped, and problem why it was
not handed out: a size limit, or an owner’s read that failed. The engine draws no indicator.