xstate@5.0.0-beta.20

Major Changes

• #4036 e2440f0b1 Thanks @davidkpiano! - Actor types can now be specified in the .types property of createMachine:

  const fetcher = fromPromise(() => fetchUser());
  
  const machine = createMachine({
    types: {} as {
      actors: {
        src: 'fetchData'; // src name (inline behaviors ideally inferred)
        id: 'fetch1' | 'fetch2'; // possible ids (optional)
        logic: typeof fetcher;
      };
    },
    invoke: {
      src: 'fetchData', // strongly typed
      id: 'fetch2', // strongly typed
      onDone: {
        actions: ({ event }) => {
          event.output; // strongly typed as { result: string }
        }
      },
      input: { foo: 'hello' } // strongly typed
    }
  });

Minor Changes

• #4157 31eb5f8a1 Thanks @Valkendorm! - Merge sendBack and receive with other properties of fromCallback logic creator.

  const callbackLogic = fromCallback(({ input, system, self, sendBack, receive }) => { ... });