Generated by XState Viz: https://xstate.js.org/viz

machine.js

  // Available variables:
  // - Machine
  // - interpret
  // - assign
  // - send
  // - sendParent
  // - spawn
  // - raise
  // - actions
  // - XState (all XState exports)
  
const fetching = () =>
  fetch('https://hacker-news.firebaseio.com/v0/item/160705.json?print=pretty')
    .then((res) => res.data)
  
const fetchMachine = Machine(
  {
    id: 'fetch',
    initial: 'idle',
    context: {
      data: {},
      error: {},
      isFetching: false,
    },
    states: {
      idle: {
        entry: 'isNotFetching',
        on: {
          FETCH: 'fetching',
        },
      },
      fetching: {
        entry: 'isFetching',
        invoke: {
          id: 'repo',
          src: fetching,
          onDone: {
            target: 'success',
            actions: ['getData'],
          },
          onError: {
            target: 'failure',
            actions: ['getError'],
          },
        },
        on: {
          CANCEL: 'idle',
        },
      },
      intervalFetching: {
        after: {
          INTERVAL: 'fetching',
        },
        on: {
          CANCEL: 'idle',
        },
      },
      success: {
        entry: 'isNotFetching',
        after: {
          0: 'intervalFetching',
        },
      },
      failure: {
        entry: 'isNotFetching',
        on: {
          RETRY: 'idle',
        },
      },
    },
  },
  {
    delays: {
      INTERVAL: 10000,
    },
    actions: {
      getData: assign({
        data: (context, event) => event.data,
      }),
      getError: assign({
        error: (context, event) => event.data,
      }),
      isNotFetching: assign({ isFetching: false }),
      isFetching: assign({ isFetching: true }),
    },
  },
)