chore: consolidate new foundation and archive v1 (#1495)

This commit is contained in:
2026-09-07 12:32:57 -05:00
3511 changed files with 727899 additions and 10 deletions
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---
category: '@RxJS'
---
# watchExtractedObservable
Watch the values of an RxJS [`Observable`](https://rxjs.dev/guide/observable) as extracted from one or more composables.
Automatically unsubscribe on observable change, and automatically unsubscribe from it when the component is unmounted.
Supports all overloads of [`watch`](https://vuejs.org/guide/essentials/watchers.html#basic-example).
## Usage
<!-- TODO: import rxjs error if enable twoslash -->
```ts no-twoslash
import { watchExtractedObservable } from '@vueuse/rxjs';
import { computed, reactive, useTemplateRef } from 'vue';
import { AudioPlayer } from '../my/libs/AudioPlayer';
// setup()
const audio = useTemplateRef('audio');
const player = computed(() => (audio.value ? new AudioPlayer(audio.value) : null));
const state = reactive({
progress: 0,
});
watchExtractedObservable(
player,
(p) => p.progress$,
(percentage) => {
state.progress = percentage * 100;
},
);
```
If you want to add custom error handling to an `Observable` that might error, you can supply an optional `onError` configuration. Without this, RxJS will treat any error in the supplied `Observable` as an "unhandled error" and it will be thrown in a new call stack and reported to `window.onerror` (or `process.on('error')` if you happen to be in Node).
You can also supply an optional `onComplete` configuration if you need to attach special behavior when the watched observable completes.
```ts no-twoslash
import { watchExtractedObservable } from '@vueuse/rxjs';
import { computed, reactive, useTemplateRef } from 'vue';
import { AudioPlayer } from '../my/libs/AudioPlayer';
// setup()
const audio = useTemplateRef('audio');
const player = computed(() => (audio.value ? new AudioPlayer(audio.value) : null));
const state = reactive({
progress: 0,
});
watchExtractedObservable(
player,
(p) => p.progress$,
(percentage) => {
state.progress = percentage * 100;
},
{
onError: (err: unknown) => {
console.error(err);
},
onComplete: () => {
state.progress = 100; // or 0, or whatever
},
},
);
```
If you want, you can also pass `watch` options as the last argument:
```ts no-twoslash
import { watchExtractedObservable } from '@vueuse/rxjs';
import { computed, reactive, useTemplateRef } from 'vue';
import { AudioPlayer } from '../my/libs/AudioPlayer';
// setup()
const audio = useTemplateRef('audio');
const player = computed(() => (audio.value ? new AudioPlayer(audio.value) : null));
const state = reactive({
progress: 0,
});
watchExtractedObservable(
player,
(p) => p.progress$,
(percentage) => {
state.progress = percentage * 100;
},
{
onError: (err: unknown) => {
console.error(err);
},
},
{
immediate: true,
},
);
```
## Type Declarations
```ts
export type OnCleanup = (cleanupFn: () => void) => void;
export type WatchExtractedObservableCallback<Value, OldValue, ObservableElement> = (
value: NonNullable<Value>,
oldValue: OldValue,
onCleanup: OnCleanup,
) => Observable<ObservableElement>;
export interface WatchExtractedObservableOptions {
onError?: (err: unknown) => void;
onComplete?: () => void;
}
export declare function watchExtractedObservable<
T extends MultiWatchSources,
E,
Immediate extends Readonly<boolean> = false,
>(
sources: [...T],
extractor: WatchExtractedObservableCallback<MapSources<T>, MapOldSources<T, Immediate>, E>,
callback: (snapshot: E) => void,
subscriptionOptions?: WatchExtractedObservableOptions,
watchOptions?: WatchOptions<Immediate>,
): WatchHandle;
export declare function watchExtractedObservable<
T extends Readonly<MultiWatchSources>,
E,
Immediate extends Readonly<boolean> = false,
>(
source: T,
extractor: WatchExtractedObservableCallback<MapSources<T>, MapOldSources<T, Immediate>, E>,
callback: (snapshot: E) => void,
subscriptionOptions?: WatchExtractedObservableOptions,
watchOptions?: WatchOptions<Immediate>,
): WatchHandle;
export declare function watchExtractedObservable<T, E, Immediate extends Readonly<boolean> = false>(
source: WatchSource<T>,
extractor: WatchExtractedObservableCallback<T, Immediate extends true ? T | undefined : T, E>,
callback: (snapshot: E) => void,
subscriptionOptions?: WatchExtractedObservableOptions,
watchOptions?: WatchOptions<Immediate>,
): WatchHandle;
export declare function watchExtractedObservable<
T extends object,
E,
Immediate extends Readonly<boolean> = false,
>(
source: T,
extractor: WatchExtractedObservableCallback<T, Immediate extends true ? T | undefined : T, E>,
callback: (snapshot: E) => void,
subscriptionOptions?: WatchExtractedObservableOptions,
watchOptions?: WatchOptions<Immediate>,
): WatchHandle;
```