The code is below
import {Component} from 'angular2/core';
import {Observable} from 'rxjs/Rx';
@Component({
selector: 'my-app',
template: 'Ticks (every second) : {{ticks}}'
})
export class AppComponent {
ticks =0;
click(){
let timer = Observable.timer(2000,1000);
timer.subscribe(t=>this.ticks = t);
}
}
But i am getting an error. The error is in the following line:
let timer = Observable.timer(2000,1000);
The definition of error is "property timer doesn't exist on type typeof Observable" Why am I getting error like that? What do you think?
Thats because you havent patched the timer
method into the Observable
prototype.
Update: Rxjs 6.0.0
Import the creation method as a static pure function:
import { timer } from 'rxjs';
let timer$ = timer(2000,1000);
Original answer:
You have 2 options:
1) Patch the method with:
import 'rxjs/add/observable/timer';
2) Import the operator as a static pure function:
import { timer } from 'rxjs/observable/timer';
let timer$ = timer(2000,1000);
Personally I would recommend the 2nd approach.
The timer function now need to be imported directly from rxjs library, Below works fine.The message 'fired' will be seen in console after 10 seconds.
import { timer } from 'rxjs';
const numbers = timer(10000);
numbers.subscribe(any => console.log('fired'));
Please see this link for more details:https://rxjs-dev.firebaseapp.com/api/index/function/timer
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