38 lines
869 B
TypeScript
38 lines
869 B
TypeScript
import { noChange } from 'lit';
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import { AsyncDirective, directive } from 'lit/async-directive.js';
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import { rxjs } from '@push.rocks/smartrx';
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class SubscribeDirective extends AsyncDirective {
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observable: rxjs.Observable<unknown> | undefined;
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sub: rxjs.Subscription | null = null;
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render(observable: rxjs.Observable<unknown>) {
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if (this.observable !== observable) {
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this.sub?.unsubscribe();
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this.observable = observable;
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if (this.isConnected) {
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this.subscribe(observable);
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}
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}
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return noChange;
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}
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subscribe(observable: rxjs.Observable<unknown>) {
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this.sub = observable.subscribe((v: unknown) => {
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this.setValue(v);
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});
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}
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disconnected() {
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this.sub?.unsubscribe();
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}
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reconnected() {
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this.subscribe(this.observable!);
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}
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}
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export const subscribe = directive(SubscribeDirective);
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