typescript - Angular 2/4 component with dynamic template or templateUrl

Question

I have been trying to find a solution for this everywhere.

I have a project with different 'skins', which are basically different sets of templates/Css.

I am trying to have my components use the skin based on a variable THEME_DIR.

Unfortunately, I cannot find how to make that happens. I looked into the Dynamic Component Loader on angular.io without success.

I also looked at a few answers here without success either.

Does anyone have an idea?

This is what I tried so far:

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

// @Component({
//     templateUrl: '../../assets/theme/'+THEME_DIR+'/login.template.html',
// })

export class LoginComponent implements, AfterViewInit {


    private log = Log.create('LoginPage');

    constructor(private mzksLsRequestService: MzkLsRequestService,
                private componentFactoryResolver: ComponentFactoryResolver,
                public viewContainerRef: ViewContainerRef) {
    }



    ngAfterViewInit() {
        let componentFactory = this.componentFactoryResolver.resolveComponentFactory(new Component({
            templateUrl: '../../assets/theme/default/login.template.html',
        }));
        let viewContainerRef = this.viewContainerRef;
        viewContainerRef.clear();
        let componentRef = viewContainerRef.createComponent(componentFactory);

    }

}

Answer 1

You can do it like this:

import {
  Compiler, Component, Injector, VERSION, ViewChild, NgModule, NgModuleRef,
  ViewContainerRef
} from '@angular/core';


@Component({
  selector: 'my-app',
  template: `
      <h1>Hello {{name}}</h1>
      <ng-container #vc></ng-container>
  `
})
export class AppComponent {
  @ViewChild('vc', {read: ViewContainerRef}) vc;
  name = `Angular! v${VERSION.full}`;

  constructor(private _compiler: Compiler,
              private _injector: Injector,
              private _m: NgModuleRef<any>) {
  }

  ngAfterViewInit() {
    const tmpCmp = Component({
        moduleId: module.id, templateUrl: './e.component.html'})(class {
    });
    const tmpModule = NgModule({declarations: [tmpCmp]})(class {
    });

    this._compiler.compileModuleAndAllComponentsAsync(tmpModule)
      .then((factories) => {
        const f = factories.componentFactories[0];
        const cmpRef = f.create(this._injector, [], null, this._m);
        cmpRef.instance.name = 'dynamic';
        this.vc.insert(cmpRef.hostView);
      })
  }
}

Just make sure that the URL is correct and the template is loaded into the client.

Read Here is what you need to know about dynamic components in Angular for more details.