Parent component
import { Component, OnChange } from '@angular/core';
import { ChildComponent } from '../../reusable/user-offers/user-offers.component';
@Component({
...
directives: [ ChildComponent ]
})
export class ParentComponent implements OnChange {
@ViewChild(ChildComponent)
private child: ChildComponent;
ngOnChanges() {
detecting this.child.detectme variable...
}
}
Child component
import { Component, Input } from '@angular/core';
@Component({
...
})
export class ParentComponent {
@Input() detectme: string;
//in view something changes detectme value (not important here)
}
How can I detect if child.detectme changed and print it's value?
You want to detect in parent component that the value in the child component changed, right? If so, you should use EventEmitter
in the child component and emit the event. Then you subscribe to the event in the parent component using (eventNameFromChild)="handler($event)"
syntax.
Created a plunk for you.
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