toObserver

Category

@RxJS

Export Size

73 B

Package

@vueuse/rxjs

Last Changed

last month

Sugar function to convert a ref into an RxJS Observer. Available in the @vueuse/rxjs add-on.

Usage

TypeScript

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

const count = shallowRef(0)
const button = useTemplateRef('buttonRef')

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

import { from, fromEvent, toObserver, useSubscription } from '@vueuse/rxjs'
import { interval } from 'rxjs'
import {
  map,
  mapTo,
  startWith,
  takeUntil,
  withLatestFrom,
} from 'rxjs/operators'
import { shallowRef, useTemplateRef } from 'vue'
const count = shallowRef(0)
const button = useTemplateRef('buttonRef')
useSubscription(
  interval(1000)
    .pipe(
      mapTo(1),
      takeUntil(fromEvent(button, 'click')),
      withLatestFrom(from(count).pipe(startWith(0))),
      map(([curr, total]) => curr + total),
    )
    .subscribe(toObserver(count)),
)

Type Declarations

export declare function toObserver<T>(value: Ref<T>): NextObserver<T>

Source

Source • Docs

Contributors

Anthony Fu

SerKo

Anthony Fu

ywenhao

Robin

IlyaL

Theodros Zelleke

Curt Grimes

yang

Michel Betancourt

Changelog

v13.6.0 on 7/28/2025

d32f8 - refactor: add @__NO_SIDE_EFFECTS__ annotations to all pure functions (#4907)

v12.0.0-beta.1 on 11/21/2024

0a9ed - feat!: drop Vue 2 support, optimize bundles and clean up (#4349)