如何订阅子组件angular2中的observable？

Question

I'm getting an undefined value error when subscribing to an observable in a child component. What is the correct way to subscribe to it?

I tried to use ngOnChanges but I get the store observable there and I don't want to bind the store to the child component

Answer 1

First of all you can pass the result value using the async pipe like this :

[data]="vhqEndpointOptions$ | async"

and then you won't have to manage the subscription and just get the array value.

if you need the observable you can use a setter for the @Input :

@Input("data") 
set Data(value:Observable<any[]>){
  if(value){
    value.subscribe(...);
  }
}