Hi Hervé,
With the observables I find it very easy to use the async pipe: you don't
have to subscribe, store the result, keep the subscription and unsubscribe
when the component is destroyed.
I may have missed something but I use this extensively and I have not
noticed any drawback yet.
Regards,
Arnaud.
On Friday, 25 October 2019 14:46:49 UTC+2, Hervé Le Cornec wrote:
>
> Hello,
>
> Many discussions here a related to the use of async data in Angular, so
> let me recall the basics.
>
> Angular is natively designed to handle the async processes, because nearly
> everthing is async in javascript (loading, events, ...). To intend so
> Angular simply use the elvis operator "*?.*".
>
> Here is an example of a component that retrieve async data and displays it
> :
>
> *1) The typescriptof the component *(a timeout has been setup to simulate
> an async feed of the customer data)
> import { Component, OnInit } from '@angular/core';
>
> @Component({
> selector: 'app-mycomponent',
> templateUrl: './mycomponent.component.html',
> styleUrls: ['./mycomponent.component.css']
> })
> export class MycomponentComponent implements OnInit {
>
> customer: any;
>
> constructor() { }
>
> ngOnInit() {
>
> //Feed the customer variable asynchronously
> setTimeout(()=> {
> this.customer = {
> name: 'Bob',
> age: 25
> }
> }, 2000);
>
> }
> }
>
>
> *2) The HTML template of the component*
> <ul>
> <li>Name : {{customer?.name}}</li>
> <li>Age : {{customer?.age}}</li>
> </ul>
>
> This is as simple as this.
> As you see there is no need for a "*| async*" in the template of the
> component, there is neither any need for a direct use of rxjs observables.
>
> I hope this can help.
> Cheers
>
>
>
>
>
>
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