XState 6.0.0-alpha.16

Minor Changes

• e410f24: Add state-level onError transitions for handling xstate.error.* events.

  State onError catches actor, execution, and communication errors while the state is active. The caught error is available on event.error.

  const machine = createMachine({
    initial: 'active',
    states: {
      active: {
        onError: ({ event }) => ({
          target: 'failed',
          context: {
            message:
              event.error instanceof Error
                ? event.error.message
                : String(event.error)
          }
        })
      },
      failed: {}
    }
  });
  

Patch Changes

• f6edec7: Allow machines with no external events to be used anywhere AnyActorLogic or AnyStateMachine is expected.

  const machine = setup({
    schemas: {
      events: {}
    }
  }).createMachine({});
  
  const logic: AnyActorLogic = machine;
  const anyMachine: AnyStateMachine = machine;
  

  Machines with empty event schemas still reject external events sent to their actors.