OptionalcallIsOk?: ValueNotifier<boolean>Optionalkeepalive?: booleanpass keepalive to fetch to finish the request even if the page unloads.
OptionallogIfRetrying?: booleanlog if a retry happens.
OptionalonRetry?: (error: Error) => voidcalled whenever a retry happens. The passed in error will always match the error predicate passed to the client.
pass a value notifier that will turn to false if something goes wrong, and back to true if things are good.