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 fetchMachine = new Machine({
  id: 'dataMachine',
  devTools: true,
  initial: 'loading',
  context: {
    data: [],
  },
  states: {
    loading: {
      invoke: {
        id: 'dataLoader',
        src: (context, _event) => {
          return (callback, _onEvent) => {
            setTimeout(() => {
              const { data } = context
              const newData = allData.slice(data.length, data.length + perPage)
              const hasMore = newData.length === perPage

              if (hasMore) {
                callback({ type: 'DONE_MORE', newData })
              } else {
                callback({ type: 'DONE_COMPLETE', newData })
              }
            }, 1000)
          }
        },
      },
      on: {
        DONE_MORE: {
          target: 'more',
          actions: assign({
            data: ({ data }, { newData = [] }) => [...data, ...newData],
          }),
        },
        DONE_COMPLETE: {
          target: 'complete',
          actions: assign({
            data: ({ data }, { newData = [] }) => [...data, ...newData],
          }),
        },
        FAIL: 'failure',
      },
    },
    more: {
      on: {
        LOAD: 'loading',
      },
    },
    complete: { type: 'final' },
    failure: { type: 'final' },
  },
})