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 = Machine({
    id: 'fetch',
    initial: 'idle',
    context: {
      retries: 0,
      results: null,
      error: null
    },
    states: {
      idle: {
        on: {
          FETCH: 'loading'
        }
      },
      loading: {
        id: 'fetchData',
        src: 'fetchData',
        invoke: {
          onDone: {
            target: 'success',
            actions: ['setResults']
          },
          onError: {
            target: 'failed',
            actions: ['setError']
          }
        }
      },
      success: {
        initial: 'unknown',
        on: {
          FETCH: 'loading'
        },
        states: {
          unknown: {
            on: {
              '': [
                {target: 'withData', cond: 'hasData'},
                {target: 'withoutData'}
              ]
            }
          },
          withData: {},
          withoutData: {}
        }
      },
      failed: {
        on: {
          RETRY: 'loading',
          actions: ['countRetries']
        }
      }
    }
  }, {
    actions: {
      setResults: assign((ctx, event) => ({
        results: event.data
      })),
      setError: assign((ctx, event) => ({
        error: event.data
      }))
    },
    guards: {
      hasData: () => {
        return false
      }
    }
  });