I am trying to call view child of a child component from parent and getting undefined in the console.
see the image also see the stack blaze for the same
https://stackblitz.com/edit/angular-ivy-k4m2hp?file=src%2Fapp%2Fhello.component.ts
import { Component, Input, OnInit, ViewChild } from '@angular/core';
import { TestChildComponent } from './test-child/test-child.component';
@Component({
selector: 'hello',
template: `<h1>this is Hello component {{name}}!</h1>`,
styles: [`h1 { font-family: Lato; }`],
})
export class HelloComponent {
@Input() name: string;
@ViewChild('TestChildComponent') testChildComponent: TestChildComponent
ngOnInit() {
console.log('calling ngOninit in hello component');
console.log('going to call test child instance this.TestChildComponent.ngOninit')
console.log(this.testChildComponent);
}
}
Please help to get the child component
this.testChildComponent
So that i can call ngOnInit of child from parent.
this.testChildComponent.ngOnInit()
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Answer
if you set your viewChild { static: true } you will be able to access it in ngOnInit
but in your sample the issue is due totestChildComponent is a child of app.component and not hello.component
<app-test-child childname="{{ name }}" #test></app-test-child>
app.component.ts
import { Component, VERSION, ViewChild } from '@angular/core';
import { TestChildComponent } from './test-child/test-child.component';
@Component({
selector: 'my-app',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css'],
})
export class AppComponent {
name = 'this is from app compoenent';
@ViewChild('test', { static: true }) testChildComponent: TestChildComponent;
ngOnInit() {
console.log('calling ngOninit in app component');
console.log(this.testChildComponent);
}
}
If you want to access testChildComponent from hello.component you will have to send it the component as an input for sample
following a working sample of accessing testChildComponent
https://stackblitz.com/edit/angular-ivy-tvwukg?file=src%2Fapp%2Fapp.component.html