Type alias StartStopNotifier<T>

StartStopNotifier<T>: ((set, update) => void | (() => void))

Start and stop notification callbacks. This function is called when the first subscriber subscribes.

Type Parameters

T

Type declaration

- (set, update): void | (() => void)
- Parameters
  - set: ((value) => void)
    Function that sets the value of the store.
    - (value): void
      Parameters
      value: T
      Returns void
  - update: ((fn) => void)
    Function that sets the value of the store after passing the current value to the update function.
    - (fn): void
      Parameters
      fn: Updater<T>
      Returns void
  Returns void | (() => void)

Returns

Optionally, a cleanup function that is called when the last remaining subscriber unsubscribes.