Thursday 16 November 2017
typescript - Observable in angular 2 ?
Answer
I searched and explored regarding my question
but I didn't get the appropriate answer, I am new in angular 2, exploring and creating a
demo app with the help of angular's official doc. (
noreferrer">https://angular.io/docs/ts/latest/tutorial/toh-pt6.html ). Now
I reached HTTP section. Here I am not able to understand what is observable and why it
is used?
Can anyone please let me
know why Observable used in below
code?
search(term: string):
Observable {
return this.http
.get(`app/heroes/?name=${term}`)
.map(response => response.json().data as
Hero[]);
}
why here also
?:
import { Hero } from
'./hero';
export class HeroSearchComponent implements OnInit
{
heroes:
Observable;
}
I
am still confused for promise and observable . What is the difference between promise
and observable ? And why they chose Observable ?
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