statelyai/xstate xstate@5.29.0

on GitHub

Minor Changes

• #5299 ca8306f Thanks @Uniqen! - Add actor.select(selector, equalityFn?) method to derive a Readable<TSelected> from an actor's snapshot. The returned object has .subscribe() (only emits when the selected value changes, using Object.is by default) and .get() for synchronous access.

  const actor = createActor(machine);
  actor.start();
  
  const count = actor.select((snap) => snap.context.count);
  
  count.get(); // current value
  
  count.subscribe((value) => {
    console.log(value); // only fires when count changes
  });