​

const add = createEvent()

const sub = createEvent()

const reset = createEvent()

const $counter = createStore(0)

$counter.watch(n => console.log('counter: ', n))

// counter: 0

add.watch(() => console.log('add'))

sub.watch(() => console.log('subtract'))

reset.watch(() => console.log('reset counter'))

​

$counter

  .on(add, (count, num) => count + num)

  .on(sub, (count, num) => count - num)

  .reset(reset)

add(2)

// counter: 2

// add

sub(1)

// counter: 1

// subtract

reset()

// counter: 0

// reset counter

​