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 promiseState = id => ({
  initial: "inProgress",
  states: {
    inProgress: {
      on: {
        REJECT: "#promiseAll.rejected",
        ['RESOLVE' + id]: {
          target: "done"
        }
      }
    },
    done: {
      type: "final",
      entry: send('RESOLVE')
    }
  }
});

const promiseAll = Machine({
  id: "promiseAll",
  initial: "idle",
  context: {},
  states: {
    idle: {
      on: {
        RUN: "progress"
      }
    },
    progress: {
      type: "parallel",
      states: {
        promise1: promiseState(1),
        promise2: promiseState(2),
        promise3: promiseState(3),
        resolver: {
          initial: "0",
          states: {
            0: {
              on: {
                RESOLVE: "1"
              }
            },
            1: {
              on: {
                RESOLVE: "2"
              }
            },
            2: {
              on: {
                RESOLVE: "done"
              }
            },
            done: {
              on: {
                "": "#promiseAll.resolved"
              },
              type: "final"
            }
          }
        }
      }
    },
    resolved: {
      type: "final"
    },
    rejected: {
      type: "final"
    }
  }
});