All Questions
Tagged with angular observable
6,074 questions
1
vote
1
answer
30
views
Input Subject is empty in child component Angular 17
I am trying to pass data from a parent to its child component in Angular 17.
The data is retrieved from the back-end through an API that gets an array of items.
In my parent component, items$ is a ...
- 172
0
votes
0
answers
39
views
Angular Tanstack Cached Observables are refreshing data and not using the cache causing problems
I'll keep it short as possible ><
-I have a left hand menu with items that can be expanded/collapsed. This is dependent on "getAll()" and works as expected.
-When I incorporated "...
- 175
1
vote
1
answer
64
views
Why using EventEmitter in angular is considered bad practice
In an angular project (v17), I've used EventEmitter to notify one component, of the changes of another, somewhat unrelated (not a parent nor grandparent, not a child nor a grandchild) component. I can'...
- 76
1
vote
1
answer
47
views
Call function after signal value change
I have a component with a simple login form.
@Component({
selector: 'app-login',
standalone: true,
imports: [
ReactiveFormsModule,
MatCardModule,
...
],
templateUrl: './login....
- 11
1
vote
3
answers
58
views
Initialize BehaviorSubject with value from Observable
I was trying to create an item counter for Wishlist Entries in my header area and tried to apply the solutions suggested here (for Cart Items)
Change shopping-cart count in header in Angular
...
0
votes
2
answers
43
views
Losing reference to this in async function inside subscribe
I'm almost new to Angular and I'm really lost with the async and sync methods, await, observables, promises...
I have a button that opens a modal window, reads a barcode and with the information of ...
- 27
2
votes
3
answers
109
views
How to modify data in an angular component when using async pipe
I have an Angular 18 component that receives an observable, which I render on the page using an async pipe. I want to be able to modify the data within this component and then press a "Save"...
- 33.8k
1
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0
answers
47
views
RxJs Observables and Subjects resolving async process times when browser is in focus
I'm a bit new to Angular and have forked a complex project that in a subscription to a websocket, uses Observables, Subjects and ReplaySubjects altogether to achieve a function that I summarize here:
...
- 338
0
votes
2
answers
72
views
forkJoin after APIs are completed - rxjs
So,I'm in kind of fix here. I've got 2 GET APIs. I need to do something once those APIs return success.
I did the following.
let sub1$ = this.myService.callFirstApi();
let sub2$ = this.myService....
- 149
0
votes
1
answer
44
views
Why is this returning a subscription instead of an observable?
I have a function that adds an item to my list, it returns an observable that I can display some data
add() {
let data$ = of(this.data);
data$.subscribe((val: any) => {
let ...
- 4,735
0
votes
1
answer
43
views
How to remove item from observable list?
I have a simple todo list that when clicking on "complete", it should remove that item from the list, but nothing seems to be happenning when clicking on it.
Stackblitz: Link
HTML:
<div *...
- 4,735
0
votes
0
answers
44
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Angular Login/Logout Behavior
I have a question. I have an application with Login and Logout which works, but with a hiccup.
Here is the scenario. Using Observable, When user logins in it shows there user name, when they logout ...
- 187
0
votes
1
answer
85
views
How can I test an Angular component property value updated by observable callback before finalize() is called?
I have a component property that is updated in the next method of an observable I subscribe to that represents the upload progress of an http event. When writing unit tests for this method, I want to ...
- 43
1
vote
2
answers
70
views
Why does my state observable tell me Type must have a [Symbol.iterator]()
Framework: Angular v18.1.0
Dependencies:
RxJS v7.8.0
@ngrx/effects v18.0.2
@ngrx/store v18.0.2
Given the following RxJS architecture. I have a simple reducer with one state and an interface with a ...
- 1,839
0
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0
answers
19
views
this._user.next(value); is not propagating to the GUI in which cases?
I am going off a template and I have the following UserService
@Injectable({ providedIn: 'root' })
export class UserService {
private _baseClient = inject(BaseClient);
private _singleModel = ...
- 20.1k