In Angular, getting a reference to a child component inside an ng-template requires using the ViewChild or ViewChildren decorators along with a template reference variable.

Here's how you can get a reference to a child component inside an ng-template:

  1. In your parent component template, use the ng-template element with a template reference variable:
html
<!-- Parent component template --> <ng-template #childComponentTemplate> <app-child-component></app-child-component> </ng-template>
  1. In your parent component class, use @ViewChild or @ViewChildren to access the template reference variable:
typescript
import { Component, ViewChild, AfterViewInit } from '@angular/core'; import { ChildComponent } from './child.component'; @Component({ selector: 'app-parent-component', templateUrl: './parent.component.html', styleUrls: ['./parent.component.css'] }) export class ParentComponent implements AfterViewInit { @ViewChild('childComponentTemplate', { static: false }) childComponentTemplate; ngAfterViewInit() { // Access the child component using the template reference variable // The childComponentTemplate variable refers to the ng-template element // containing the child component, not the component itself. // To access the child component, you can use the "createEmbeddedView" method. const view = this.childComponentTemplate.createEmbeddedView(null); const childComponentRef = view.rootNodes[0] as ChildComponent; // Now you have a reference to the child component and can interact with it. // For example, you can call methods or set properties on the child component. childComponentRef.someMethod(); childComponentRef.someProperty = 'new value'; } }

In the above example, we used @ViewChild('childComponentTemplate') to get a reference to the ng-template element. After that, we created an embedded view using createEmbeddedView, which contains the child component instance. We can then interact with the child component as needed.

Keep in mind that accessing the child component inside the ngAfterViewInit hook ensures that the ng-template has been instantiated, and the child component is available for interaction.

Also, note that when using @ViewChild, we set { static: false } because the ng-template content is projected content and may not be available at the time of component construction. Setting it to false ensures that the child component is obtained after view initialization.

Remember that directly interacting with a child component through the template reference variable can lead to tight coupling between components. If possible, consider using Angular's data binding and event handling mechanisms to communicate between parent and child components in a more loosely coupled manner.

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