toObserver #

import { ref } from 'vue'
import { useSubscription, toObserver, fromEvent, from } from '@vueuse/rxjs'
import { interval } from 'rxjs'
import { mapTo, takeUntil, withLatestFrom, map } from 'rxjs/operators'

const count = ref(0)
const button = ref<HTMLButtonElement>(null)

useSubscription(
  interval(1000)
    .pipe(
      mapTo(1),
      takeUntil(fromEvent(button, 'click')),
      withLatestFrom(from(count).pipe(startWith(0))),
      map(([total, curr]) => curr + total),
    )
    .subscribe(toObserver(count)) // same as ).subscribe(val => (count.value = val))
)

import { ref } from 'vue'
import { useSubscription, toObserver, fromEvent, from } from '@vueuse/rxjs'
import { interval } from 'rxjs'
import { mapTo, takeUntil, withLatestFrom, map } from 'rxjs/operators'

const count = ref(0)
const button = ref<HTMLButtonElement>(null)

useSubscription(
  interval(1000)
    .pipe(
      mapTo(1),
      takeUntil(fromEvent(button, 'click')),
      withLatestFrom(from(count).pipe(startWith(0))),
      map(([total, curr]) => curr + total),
    )
    .subscribe(toObserver(count)) // same as ).subscribe(val => (count.value = val))
)