angular 2 re-render parent component from @ViewChild Component

Question

I am working on angular2 application where I have parent component that pops up a child component

@ViewChild(childPopupComponent) case: childPopupComponent;

What I want to do is: when pressing save button from the child component (which is popup inside the parent component), re-render the parent one for reflection to take place (instead of reloading the whole page).

I know that this re-render the current component, but how to do that from the @ViewChild one

this.ref.detectChanges();

Answer 1

Inject ChangeDetectorRef in your child component like:

export class childPopupComponent {
    constructor(public cdRef: ChangeDetectorRef) {}

and after that you will be able to run change detection cycly only on child component:

@ViewChild(childPopupComponent) case: childPopupComponent;

this.case.cdRef.detectChanges();

For updating parent you can inject it in child

export class childPopupComponent {
    constructor(public parent: ParentComponent) {}

and then

this.parent.cdRef.detectChanges()

or even try this:

import { ChangeDetectorRef, SkipSelf } from '@angular/core';

export class childPopupComponent {
    constructor(@SkipSelf() private parentCdRef: ChangeDetectorRef) {}