Function useStatebot

Example

import React from 'react'

import { Statebot } from 'statebot'
import { useStatebot } from 'statebot/hooks/react'

export let loadMachine = Statebot('loader', {
  chart: `
    idle ->
      waiting ->
      loaded | failed ->
      idle
  `
})

loadMachine.performTransitions(({ emit }) => ({
  'idle -> waiting': {
    on: 'start-loading',
    then: () => {
      // Fail half the time for this demo
      let fail = Math.random() > 0.5
      setTimeout(() => {
        fail ? emit('error') : emit('success')
      }, 1000)
    }
  },
  'waiting -> loaded': {
    on: 'success'
  },
  'waiting -> failed': {
    on: 'error'
  }
}))

let { Enter, Emit, inState } = loadMachine

function LoadingButton() {
  let state = useStatebot(loadMachine)

  return (
    <button
      className={state}
      onClick={Emit('start-loading')}
      disabled={!inState('idle')}
    >
      {inState('idle', 'Load')}
      {inState('waiting', 'Please wait...')}
      {inState('loaded', 'Done!')}
      {inState('failed', 'Whoops!')}
    </button>
  )
}

function ResetButton() {
  return <button onClick={Enter('idle')}>Reset</button>
}
Copy