ComponentResolver implementation (removing deprecated dynamiccomponentloader)

In Angular, the ComponentResolver has been deprecated and replaced with the ComponentFactoryResolver as of Angular version 9. The ComponentFactoryResolver provides a way to dynamically load and create components at runtime without relying on the deprecated ComponentResolver. Here's how you can implement dynamic component loading using the ComponentFactoryResolver.

1. Import required dependencies: First, import the necessary modules and classes in your component where you want to dynamically load other components.

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import { Component, ComponentFactoryResolver, ViewChild, ViewContainerRef } from '@angular/core';

2. Obtain a reference to the ViewContainerRef: To dynamically load components, you need access to a ViewContainerRef. This is the anchor point where you want to insert the dynamically created component. You can get the ViewContainerRef by using the @ViewChild decorator.

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@Component({
  selector: 'app-dynamic-loader',
  template: '<ng-template #dynamicComponentContainer></ng-template>'
})
export class DynamicLoaderComponent {
  @ViewChild('dynamicComponentContainer', { read: ViewContainerRef }) dynamicComponentContainer: ViewContainerRef;
}

3. Load the component dynamically: Now, you can use the ComponentFactoryResolver to dynamically load a component into the ViewContainerRef.

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export class DynamicLoaderComponent {
  constructor(private componentFactoryResolver: ComponentFactoryResolver) {}

  loadComponent(componentType: any) {
    // Clear any existing components in the container
    this.dynamicComponentContainer.clear();

    // Get the component factory for the specified component type
    const componentFactory = this.componentFactoryResolver.resolveComponentFactory(componentType);

    // Create and attach the component to the view container
    const componentRef = this.dynamicComponentContainer.createComponent(componentFactory);

    // Access the instance of the dynamically created component (optional)
    const componentInstance = componentRef.instance;

    // You can interact with the dynamically loaded component using its instance here
    // For example, you can set input properties, call methods, etc.
  }
}

Now, you can call the loadComponent method with the component type you want to dynamically load.

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@Component({
  selector: 'app-parent',
  template: `
    <button (click)="loadDynamicComponent()">Load Dynamic Component</button>
    <app-dynamic-loader #dynamicLoader></app-dynamic-loader>
  `
})
export class ParentComponent {
  @ViewChild('dynamicLoader') dynamicLoader: DynamicLoaderComponent;

  loadDynamicComponent() {
    // Pass the component type you want to load dynamically
    const componentType = YourDynamicComponent; // Replace with your actual component type
    this.dynamicLoader.loadComponent(componentType);
  }
}

With these steps, you can dynamically load and create components at runtime without using the deprecated ComponentResolver. The ComponentFactoryResolver is the recommended approach for dynamic component loading in Angular.