easy-fsm

An easy-to-use finite state machine system for JavaScript.

install

npm install easy-fsm

usage

import EasyFSM from 'easy-fsm'

let fsm = new EasyFSM({
  initial: 'init',
  states: {
    init: {
      on: {
        loaded: 'ready'
      }
    },
    ready: {}
  }
})

console.log(fsm.getState()) // init
await fsm.fire('loaded')
console.log(fsm.getState()) // ready

APIs

You can use new EasyFSM(options) to create a finite state machine.

• send(event)

Send an event on current state.

• sendAndWait(event)

Send an event on current state and wait for all listeners to finish.

• canSend(event)

Detect if the specified event can be sent.

• [getter] state

Get the current state.

• [getter] previous_state

Get the previous state.

• onEnter(state, callback)

Execute callback when entering state.

• onLeave(state, callback)

Execute callback when leaving state.