Componentfactoryresolver deprecated

The ComponentFactoryResolver is used in Angular to dynamically create components at runtime. It is responsible for locating and instantiating component factories.

In Angular, the ComponentFactoryResolver is deprecated and no longer recommended to be used directly. Instead, you should use the NgModuleFactoryLoader or ComponentFactoryResolver provided by Angular’s dependency injection system.

Here’s an example of how you can use ComponentFactoryResolver along with Angular’s dependency injection:

import { ComponentFactoryResolver, NgModuleRef, Injector } from '@angular/core';
import { MyComponent } from './my-component';

class MyDynamicComponentCreator {
   constructor(
      private componentFactoryResolver: ComponentFactoryResolver,
      private injector: Injector
   ) { }

   createAndAttachComponentToElement(element: HTMLElement) {
      const componentFactory = this.componentFactoryResolver.resolveComponentFactory(MyComponent);
      const componentRef = componentFactory.create(this.injector);
      element.appendChild(componentRef.location.nativeElement);
   }
}

// Usage:
const myDynamicComponentCreator = new MyDynamicComponentCreator(
   NgModuleRef.injector.get(ComponentFactoryResolver),
   NgModuleRef.injector
);
myDynamicComponentCreator.createAndAttachComponentToElement(document.getElementById('my-element'));
   

In the example above, the MyDynamicComponentCreator class uses the ComponentFactoryResolver to resolve the factory for the MyComponent and then creates an instance of the component using the injector. Finally, it appends the component’s root element to a specific element in the DOM.

Keep in mind that the usage of ComponentFactoryResolver might change in future versions of Angular since it is marked as deprecated. It is recommended to follow the official Angular documentation and update your code accordingly.