Angular/RxJS When should I unsubscribe from `Subscription` - Stack Overflow

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Sun Jul 02 2023 19:03:51 GMT+0000 (Coordinated Universal Time)

Saved by @nChauhan91 #javascript #angular #rxjs

import { Component, OnDestroy, OnInit } from '@angular/core';
// RxJs 6.x+ import paths
import { filter, startWith, takeUntil } from 'rxjs/operators';
import { Subject } from 'rxjs';
import { BookService } from '../books.service';

@Component({
    selector: 'app-books',
    templateUrl: './books.component.html'
})
export class BooksComponent implements OnDestroy, OnInit {
    private ngUnsubscribe = new Subject<void>();

    constructor(private booksService: BookService) { }

    ngOnInit() {
        this.booksService.getBooks()
            .pipe(
               startWith([]),
               filter(books => books.length > 0),
               takeUntil(this.ngUnsubscribe)
            )
            .subscribe(books => console.log(books));

        this.booksService.getArchivedBooks()
            .pipe(takeUntil(this.ngUnsubscribe))
            .subscribe(archivedBooks => console.log(archivedBooks));
    }

    ngOnDestroy() {
        this.ngUnsubscribe.next();
        this.ngUnsubscribe.complete();
    }
}

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https://stackoverflow.com/questions/38008334/angular-rxjs-when-should-i-unsubscribe-from-subscription/41177163#41177163

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Angular/RxJS When should I unsubscribe from `Subscription` - Stack Overflow

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