import {createEvent, createStore} from 'effector'

​

const store = createStore(0)

const increment = createEvent()

const reset = createEvent()

​

store.on(increment, state => state + 1).reset([reset])

​

store.watch(state => console.log('changed', state))

// changed 0

// watch method calls its function immediately

​

increment() // changed 1

increment() // changed 2

reset() // changed 0