Executing a function on catcing input from Property Binding in Angular

Question

@Input() UpItem: Item ;

On catching something in UpItem I want to execute a function when some property is passed from parent to child.

explore `ngOnChanges` life cycle hook – Aravind Nov 10 '17 at 14:47 — Aravind, Nov 10 '17 at 14:47

score 0 · Answer 1 · answered Nov 10 '17 at 14:53

0

Using a getter/setter is probably the best way

private _upItem:Item
@Input() set UpItem(value:Item) {
  this._upItem = value;
  this.doSomething();
}
get UpItem():Item {
  return this._upItem;
}

ngOnInit might be more convenient if you want to call the same code when one or more of several different inputs change

answered Nov 10 '17 at 14:53

Could you elaborate a bit more on "some scenarios"? – Günter Zöchbauer Nov 23 '17 at 16:34
I didn't have much hands on . But i write observable ,function ,and a console line but only observable works – shubhamsjmit Nov 23 '17 at 16:54
If something doesn't work, please edit your question and add the code that doesn't work (and the expected behavior), then post a comment so I'll get a notification. Then I can have a look. – Günter Zöchbauer Nov 23 '17 at 16:56

1 Answers1