Dynamic Components in Angular

Dynamic components in Angular allow you to create and manipulate components at runtime. This tutorial covers the basics of dynamic components and how to use them effectively in your Angular applications.

What are Dynamic Components?

Dynamic components are components that are created and added to the application dynamically at runtime, rather than being statically defined in the application template. This is useful for scenarios where the component structure needs to be determined based on user interaction or other runtime conditions.

Creating a Dynamic Component

Here is an example of creating a simple dynamic component:

import { Component, Input } from '@angular/core';

@Component({
  selector: 'app-dynamic',
  template: '<div>{{message}}</div>',
})
export class DynamicComponent {
  @Input() message: string;
}

Loading a Dynamic Component

To load a dynamic component, you need to use Angular's ComponentFactoryResolver and ViewContainerRef services:

import { Component, ComponentFactoryResolver, ViewChild, ViewContainerRef } from '@angular/core';
import { DynamicComponent } from './dynamic.component';

@Component({
  selector: 'app-root',
  template: '<div>
    <button (click)="loadComponent()">Load Component</button>
    <ng-template #dynamicContainer></ng-template>
  </div>'
})
export class AppComponent {
  @ViewChild('dynamicContainer', { read: ViewContainerRef, static: true }) container: ViewContainerRef;

  constructor(private resolver: ComponentFactoryResolver) {}

  loadComponent() {
    const factory = this.resolver.resolveComponentFactory(DynamicComponent);
    const componentRef = this.container.createComponent(factory);
    componentRef.instance.message = 'Hello, I am a dynamic component!';
  }
}

Key Points

Conclusion

Dynamic components in Angular provide flexibility for creating and manipulating components at runtime. By understanding and using dynamic components effectively, you can create more interactive and responsive Angular applications. Happy coding!