janovekj / fini Goto Github PK

useMachine({
  state1: [
    // effect to run when state is entered
    ({ state, context, dispatch }, event) => { console.log("entered state1") },
    {
      event1: () => "state1",
      event2: () => "state1"
    },
    // effect to run when state is exited
    ({ state, context, dispatch }, event) => { console.log("exited state1") }
  ]
})

{ type: "somethingHappened", payload: 12345 }

useMachine({
  state1: [
    {
      event1: ({ context, state }) => state // "state1"
    },
  ]
})

type M = Machine<{
 state1: State<{
    event1: never
  }>;
  state2: {}
}>

const [state, dispatch] = useMachine<M>(...)

if (state.state2) {
  dispatch.event1();
}

const [state, dispatch] = useMachine({
  state1: {
    event1: "state1"
  }
}, "state1")

dispatch.event1() // Property 'event1' does not exist on type '{}'.ts(2339)

const [state, dispatch] = useMachine()

const machine = useMachine()

useMachine({
  state1: {
     event1: ({exec}) => {
       exec(() => console.log("event with no return value"))
     }
  }
})