Subscribe a map binding's render function to a controller without error feedback loops.
update runs immediately and after every snapshot change. It may push recoverable
per-item errors into the supplied list or throw. The first error is reported through
the controller once, without re-entering update; a persisting failure is reported
again only after a later edit has cleared the error.
Subscribe a map binding's render function to a controller without error feedback loops.
updateruns immediately and after every snapshot change. It may push recoverable per-item errors into the supplied list or throw. The first error is reported through the controller once, without re-enteringupdate; a persisting failure is reported again only after a later edit has cleared the error.