Why a document's comments stopped following the server, if they have.
A list that has loaded survives its listener failing: it keeps being served
as it last stood rather than replacing what someone is reading with an error.
This is how that is noticed. It clears when a listener comes back, which
happens on the next client change — a token refresh, typically.
undefined while the list is live, and while it has yet to load at all: a
failure before the first snapshot is thrown from the read instead.
Why a document's comments stopped following the server, if they have.
A list that has loaded survives its listener failing: it keeps being served as it last stood rather than replacing what someone is reading with an error. This is how that is noticed. It clears when a listener comes back, which happens on the next client change — a token refresh, typically.
undefinedwhile the list is live, and while it has yet to load at all: a failure before the first snapshot is thrown from the read instead.