@design.estate/dees-element
Version:
A library for creating custom elements extending the lit element class with additional functionalities.
35 lines • 2.3 kB
JavaScript
import { noChange } from 'lit';
import { AsyncDirective, directive } from 'lit/async-directive.js';
import { rxjs } from '@push.rocks/smartrx';
/**
* Subscribes to an observable
*/
class SubscribeDirective extends AsyncDirective {
constructor() {
super(...arguments);
this.sub = null;
}
render(observable) {
if (this.observable !== observable) {
this.sub?.unsubscribe();
this.observable = observable;
if (this.isConnected) {
this.subscribe(observable);
}
}
return noChange;
}
subscribe(observable) {
this.sub = observable.subscribe((v) => {
this.setValue(v);
});
}
disconnected() {
this.sub?.unsubscribe();
}
reconnected() {
this.subscribe(this.observable);
}
}
export const subscribe = directive(SubscribeDirective);
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