I have a mane page that have a button that triggers a pop up box to appear:
<i class="material-icons" (click)="openPopUp()">info</i>
openPopUp() is just setting the property to true:
openPopUp() {
this.showPopup = true;
}
and then im sending the value of showPopUp
to the PopupComponent(its separate component):
<div *ngIf="showPopup === true">
<pop-up-info-box [componentBPopUp]="showPopup"></pop-up-info-box>
</div>
but now in the componenetB i have the closePopUp func that is triggered from the html:
closeand is just setting the componentBPopUp to be false:
@Input public componentBPopUp: boolean; public closePopUp() { this.popUp = false; }
but what actually need to be set to false is the showPopup
in the first component...how do I set its value properly?
thanks
What you should do in ComponentB is to raise an event on close.
@Output() onClose: EventEmitter<boolean> = new EventEmitter();
public closePopUp() {
this.onClose.emit(true);
}
Now on the parent just subscribe to this event:
<div *ngIf="showPopup === true">
<pop-up-info-box [componentBPopUp]="showPopup" (onClose)="showPopup = false">
</pop-up-info-box>
</div>
You should use @Output in componentBPopUp.
for example:
close(){
this.showPopup = false;
}
Example of what you trying to do:
https://plnkr.co/edit/kUWrlnoXgJ15rXObdaqh?p=preview
Good Luck!!!
To your question a parent component can refer to a child component using the @ViewChild
decorator
@ViewChild('popup')
popup: ModalComponent;
this.popup.doStuff();
<div *ngIf="showPopup === true">
<pop-up-info-box #popup [componentBPopUp]="showPopup"></pop-up-info-box>
</div>
But your specific problem can be solved with two-way data binding between the componentBPopUp and the showPopup field (see here )
Another option is to use EventEmmiter to notify the other component of the change (see here )
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