statelyai/xstate xstate@5.5.0

on GitHub

Minor Changes

• #4596 6113a590a Thanks @davidkpiano! - Introduce getNextSnapshot(...), which determines the next snapshot for the given actorLogic based on the given snapshot and event.

  If the snapshot is undefined, the initial snapshot of the actorLogic is used.

  import { getNextSnapshot } from 'xstate';
  import { trafficLightMachine } from './trafficLightMachine.ts';
  
  const nextSnapshot = getNextSnapshot(
    trafficLightMachine, // actor logic
    undefined, // snapshot (or initial state if undefined)
    { type: 'TIMER' }
  ); // event object
  
  console.log(nextSnapshot.value);
  // => 'yellow'
  
  const nextSnapshot2 = getNextSnapshot(
    trafficLightMachine, // actor logic
    nextSnapshot, // snapshot
    { type: 'TIMER' }
  ); // event object
  
  console.log(nextSnapshot2.value);
  // =>'red'

Patch Changes

• #4659 1ae07f5bf Thanks @Andarist! - Allow event in transitions to be narrowed down even when its .type is defined using a union.