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Merge branch 'livekit' into fkwp-patch-1

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fkwp 2024-04-10 16:35:23 +02:00 committed by GitHub
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9
src/state/useObservable.ts
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@ -1,5 +1,5 @@
/*
Copyright 2023 New Vector Ltd
Copyright 2023-2024 New Vector Ltd
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
@ -14,18 +14,17 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import { useEffect, useRef } from "react";
import { useRef } from "react";
import { BehaviorSubject, Observable } from "rxjs";
/**
* React hook that creates an Observable from a changing value. The Observable
* replays its current value upon subscription, emits whenever the value
* changes, and completes when the component is unmounted.
* replays its current value upon subscription and emits whenever the value
* changes.
*/
export function useObservable<T>(value: T): Observable<T> {
const subject = useRef<BehaviorSubject<T>>();
subject.current ??= new BehaviorSubject(value);
if (value !== subject.current.value) subject.current.next(value);
useEffect(() => subject.current!.complete(), []);
return subject.current;
}