The dynamically included Angular2 component fails to render, while the statically added component displays correctly

Whenever a user clicks a button, I trigger the following method.

@ViewChild("privs") privs: ElementRef;
addPrivs() {
  this.privs.nativeElement
    .insertAdjacentHTML('beforeend', '<generic1>yey!</generic1>');
}

This is how my markup looks like.

<generic1>woosh</generic1>
<div #privs></div>

I've declared the subcomponent named generic1 in the module's imports as follows.

import { Component } from "@angular/core";
@Component({
  selector: "generic1",
  template: "<div>mamba...</div>"
})
export class Generic1 { }

The problem I'm facing is that the statically created component in the markup displays correctly, but the dynamically appended one doesn't. Upon inspecting the DOM, I notice that the generic1 tag is added, but Angular does not render it (I can see the text yey! and the tag but not the actual component).

Any idea what I might be missing?

I've searched online for examples, but haven't found anything indicating an issue with my setup. It must be something beyond my current understanding...

Answer №1

Your approach to creating a dynamic component may not be fully functional as you are adding HTML that Angular does not render. When inserting HTML or text into a template in this manner, it gets sanitized and does not result in a rendered component.

For a comprehensive guide on setting up dynamic components, refer to this answer. While it provides detailed explanations, it may not offer an exact solution for your needs. The Angular.io documentation offers a good example of a dynamic component loader using the ComponentFactoryResolver to resolve and build Angular components. The crucial function from the Angular.io docs is highlighted below:

loadComponent() {
    this.currentAddIndex = (this.currentAddIndex + 1) % this.ads.length;
    let adItem = this.ads[this.currentAddIndex];
    let componentFactory = this._componentFactoryResolver.resolveComponentFactory(adItem.component);
    let viewContainerRef = this.adHost.viewContainerRef;
    viewContainerRef.clear();
    let componentRef = viewContainerRef.createComponent(componentFactory);
    (<AdComponent>componentRef.instance).data = adItem.data;
  }

This snippet fetches a component from a list of stored components, uses componentFactoryResolver to construct it, retrieves the viewContainerRef, and generates the component within it.

We hope this guidance directs you towards the right path for implementing dynamic components effectively.

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