Displaying content of Component that i fetched with @ContentChildren or @ViewChild

Question

So I'm trying to display child components at specific locations in my Component.

I have the following:

@Component({
  selector: 'app-item-list',
  template: `
<p *ngFor="let item of items">
  {{item.order}}
  <!-- display content of child component here -->
</p>`
})
export class ItemListComponent implements OnInit, AfterContentInit {

  //Get all child components of the type ItemComponent and store them.
  @ContentChildren(ItemComponent, {descendants: true}) 
  items?: QueryList<ItemComponent>;
  constructor() { }

  ngOnInit() {
  }
    
  ngAfterContentInit(): void {
      
  }

}

@Component({
  selector: 'app-item',
  template: `
<p>
  item works!
</p>
<ng-content></ng-content>
`
})
export class ItemComponent implements OnInit {

  @Input() order?: string;
  constructor() { }

  ngOnInit() {
  }

}

I tried to display it using <ng-content select="item"> but that didn't work.

With the following:

<app-item-list>
  <app-item order="2">
    test2
  </app-item>
  <app-item order="1">
    test1
  </app-item>
</app-item-list>

the expected output is

2
item works!
test2
1
item works!
test1

https://stackblitz.com/edit/angular-ivy-2aibgt

Answer 1

I can suggest you a solution that is used in Angular material library.

• Wrap content of app-item component in <ng-template> tag

item.component.html

<ng-template>  <----------------------------- wrapper
  <p>
    item works!
  </p>
  <ng-content></ng-content>
</ng-template>

• then we can grab a reference to that TemplateRef

item.component.ts

@ViewChild(TemplateRef, {static: true}) template: TemplateRef<any>;

• finally we can use it in a loop of app-item-list component

item-list.component.html

<p *ngFor="let item of items">
  {{item.order}}
  <ng-template [ngTemplateOutlet]="item.template"></ng-template>
</p>

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