[core] Add emit support for all actor logic creators

statelyai / xstate

Actor-based state management & orchestration for complex app logic.

MIT License

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This PR adds support for emitting events from all actor logic types:

Promise actors

const logic = fromPromise(async ({ emit }) => {
  // ...
  emit({
    type: 'emitted',
    msg: 'hello'
  });
  // ...
});

Transition actors

const logic = fromTransition((state, event, { emit }) => {
  // ...
  emit({
    type: 'emitted',
    msg: 'hello'
  });
  // ...
  return state;
}, {});

Observable actors

const logic = fromObservable(({ emit }) => {
  // ...

  emit({
    type: 'emitted',
    msg: 'hello'
  });

  // ...
});

Callback actors

const logic = fromCallback(({ emit }) => {
  // ...
  emit({
    type: 'emitted',
    msg: 'hello'
  });
  // ...
});

statelyai / xstate

[core] Add emit support for all actor logic creators #4935

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