Low-Level Observation APIs

Fine-grained control over the observation system. For standard effects, see effect().

createObserver()

Creates a manual observer.

export function createObserver(
  onChange: (event: StateChange) => void,
  onTrack?: (state: Linkable, key: KeyLike) => void,
  controlled?: boolean
): StateObserver;

withinObserver()

Execute a function within a specific observer's context.

export function withinObserver<R>(fn: () => R, observer: StateObserver): R;

getObserver()

Gets the current active observer.

export function getObserver(): StateObserver | undefined;

WARNING

setObserver() is deprecated. outsideObserver() is deprecated. Use untrack().