Angular-2 : Change favicon icon as per configuration

Question

I am rendering a dynamic page, menu and other items in my application. I also want to change favicon as per configured by admin.

Say, for example, if when my pag

Answer 1

app.module.ts

import {NgModule} from '@angular/core';
import {platformBrowserDynamic} from '@angular/platform-browser-dynamic';
import {BrowserModule} from '@angular/platform-browser';
import {AppComponent} from './path/to/app.component';
import {AppService} from './path/to/app.service';
// ....

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule,
        // ...
    ],
    bootstrap: [AppComponent],
    providers: [AppService]
})
export class AppModule {}

platformBrowserDynamic().bootstrapModule(AppModule);

app.service.ts

import { Injectable, Inject } from '@angular/core';
import { DOCUMENT } from '@angular/common';
import {Http, Response} from '@angular/http';
import {Observable} from 'rxjs/Rx';


@Injectable()
export class AppService {

    constructor(@Inject(DOCUMENT) private _document: HTMLDocument, private http:Http) 
    getAppDetails(appId: string) {

            return this.http.post(url, appId)
                .map((response: Response) => {
                    let details = response.json();
                    return details;
                })
                .do(data => console.log(data))
                .catch(this.handleError);
    }

     private handleError(error: Response) {
        console.error(error);
        return Observable.throw(error.json().error || 'Server error');
    }

    setAppFavicon(id: string, basepath: string, icon: string){
       this._document.getElementById('appFavicon').setAttribute('href', basepath+"/"+ icon);
    }
}

app.component.ts:

import {Component} from "@angular/core";
import {AppService} from "../path/to/app.service";


@Component({
    selector: 'application',
    templateUrl: './path/to/app.component.html'
})
export class ApplicationComponent {

    details: any;

    constructor(private appService: AppService) {

        this.details = appService.getAppDetails(id);
        appService.setAppFavicon(id,basepath,this.details.icon);

    }


}