Method then

packages/shared/ReactTypes.ts:39–39

(
		onFulfill: (value: T) => Result,
		onReject: (error: Err) => Result
	)

interface ThenableImpl<T, Result, Err> {
	then(
		onFulfill: (value: T) => Result,
		onReject: (error: Err) => Result
	): void | Wakeable<Result>;