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angular observable examplE

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Doubtful Donkey answered on March 23, 2021 Popularity 1/10 Helpfulness 1/10

answer angular observable examplE

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angular observable examplE

Comment

import {Observable} from 'rxjs';
const foo = new Observable (subscriber => {
  subscriber.next (42);
  subscriber.next (100);


});
foo.subscriber(x => {
  console.log(x);
});

Popularity 1/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: angular-observable javascript

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Contributed on Mar 23 2021

Doubtful Donkey

0 Answers Avg Quality 2/10

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angular observable pipe exemple

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import { Component, OnInit } from '@angular/core';
import { Observable, of} from 'rxjs';
import { map, filter, tap } from 'rxjs/operators'
 
 
@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent implements OnInit {
 
  obs = new Observable((observer) => {
    observer.next(1)
    observer.next(2)
    observer.next(3)
    observer.next(4)
    observer.next(5)
    observer.complete()
  }).pipe(
    filter(data => data > 2),                    //filter Operator
    map((val) => {return val as number * 2}),    //map operator
  )
 
 data = [];
 
  ngOnInit() {
    this.obs1.subscribe(
      val => {
        console.log(this.data)
      }
    )
  }
 
}

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Source: Grepper

Tags: angular-observable angular-observabl

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Contributed on May 05 2021

Dull Deer

0 Answers Avg Quality 2/10

return observable from function angular

Comment

1. Better practise is to use Observable:

import { catchError } from 'rxjs/operators';
import { throwError } from 'rxjs';

bbb() {
 return this.http.get(this.url)
   .pipe(
     catchError(err => {
       console.log('err', err);
       return throwError('Something bad happened; please try again later.');
     });
}

2. And, then simply just subscribe to bbb:

import { Subscription } from 'rxjs';

testSubscription: Subscription;

ngAfterContentInit() {
    this.testSubscription = this.bbb()
      .subscribe(son => {
        console.log('son', son); // here you get the result
      });
}

3. Don't forget to unsubscribe:

ngOnDestroy() {
  this.testSubscription.unsubscribe();
}

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: angular

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Contributed on Jun 15 2022

Coding Era

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Observable in angular

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ngOnInit() {
 
    this.obs.subscribe(
      val => { console.log(val) }, //next callback
      error => { console.log("error") }, //error callback
      () => { console.log("Completed") } //complete callback
    )
}

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Source: www.tektutorialshub.com

Tags: angular

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Contributed on Apr 07 2023

Nanu

0 Answers Avg Quality 2/10

display observable property in html angular

Comment

<h3> {{(post | async)?.title}} </h3>

//OR this for multiple properties
<ng-container *ngIf="( post$ | async ) as post">
  
    <h3> {{ post.title }} </h3>
    <h3> {{ post.description }} </h3>

</ng-container>

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Source: Grepper

Tags: angular

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Contributed on Dec 12 2022

Meti

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obeservable from an object angular

Comment

//Put an object in a observable
let myObj = {name: "Maria", age: 23};
this.myObs$ = of(myObj);

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Source: Grepper

Tags: angular

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Contributed on Aug 13 2021

Watcher O_O

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display observable in html angular

Comment

 
<!--.html file-  use '|async' pipe -->
<ul class=""  scope="row" *ngFor="let aboutus of this.pageData |async " >             
		<li>{{aboutus.key}} {{aboutus.data.details}} </li>                               
 </ul>

Popularity 10/10 Helpfulness 1/10 Language html

Source: Grepper

Tags: angular

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Contributed on Apr 09 2022

Farwa Miraj

0 Answers Avg Quality 2/10

what is observable in angular

Comment

Observable in Angular is a feature that provides support 
for delivering messages between different parts of your single-page application.
This feature is frequently used in Angular because it is responsible 
for handling multiple values, asynchronous programming in Javascript, 
  and also event handling processes.

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Source: www.javatpoint.com

Tags: angular

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Contributed on Jun 20 2022

Rasel Ahmed

0 Answers Avg Quality 2/10

angular observable examplE

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