statelyai/xstate xstate@5.0.0-beta.23

on GitHub

Minor Changes

• #4180 6b1646ba8 Thanks @davidkpiano! - You can now specify action types for machines:

  createMachine({
    types: {} as {
      actions: { type: 'greet'; params: { name: string } };
    },
    entry: [
      {
        type: 'greet',
        params: {
          name: 'David'
        }
      },
      // @ts-expect-error
      { type: 'greet' },
      // @ts-expect-error
      { type: 'unknownAction' }
    ]
    // ...
  });

• #4179 2b7548579 Thanks @davidkpiano! - Output types can now be specified in the machine:

  const machine = createMachine({
    types: {} as {
      output: {
        result: 'pass' | 'fail';
        score: number;
      };
    }
    // ...
  });
  
  const actor = createActor(machine);
  
  // ...
  
  const snapshot = actor.getSnapshot();
  
  if (snapshot.output) {
    snapshot.output.result;
    // strongly typed as 'pass' | 'fail'
    snapshot.output.score;
    // strongly typed as number
  }