PgPubSub.once() method

Sets 'close' event handler, which fired only one single time

Signature:

once(event: 'close', listener: typeof close): this;

Parameters

Parameter	Type	Description
event	'close'	`'close'` — the connection was closed by close(), leaving it re-usable
listener	typeof close	handler invoked when the connection was closed by close(), leaving it re-usable. Fires at most once.

Returns:

this

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