4a3ce4cc1d
Add comprehensive reference documentation for: - Vitest: environments, projects/workspaces, type testing, vi utilities - Pinia: HMR, Nuxt integration, SSR setup - Vue: built-in components (Transition, Teleport, Suspense, KeepAlive) and advanced directives
39 lines
932 B
Markdown
39 lines
932 B
Markdown
---
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category: '@RxJS'
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---
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# toObserver
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Sugar function to convert a `ref` into an RxJS [Observer](https://rxjs.dev/guide/observer).
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## Usage
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<!-- TODO: import rxjs error if enable twoslash -->
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```ts no-twoslash
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import { from, fromEvent, toObserver, useSubscription } from '@vueuse/rxjs'
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import { interval } from 'rxjs'
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import { map, mapTo, startWith, takeUntil, withLatestFrom } from 'rxjs/operators'
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import { shallowRef, useTemplateRef } from 'vue'
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const count = shallowRef(0)
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const button = useTemplateRef('buttonRef')
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useSubscription(
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interval(1000)
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.pipe(
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mapTo(1),
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takeUntil(fromEvent(button, 'click')),
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withLatestFrom(from(count).pipe(startWith(0))),
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map(([curr, total]) => curr + total),
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)
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.subscribe(toObserver(count)), // same as ).subscribe(val => (count.value = val))
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)
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```
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## Type Declarations
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```ts
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export declare function toObserver<T>(value: Ref<T>): NextObserver<T>
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```
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