gallery-frontend/src/app/app.module.ts

import { BrowserModule } from '@angular/platform-browser';
import { BrowserAnimationsModule } from "@angular/platform-browser/animations"
import { NgModule } from '@angular/core';
import { PLATFORM_ID, APP_ID, Inject } from '@angular/core';
import { isPlatformBrowser } from '@angular/common';

import { AppRoutingModule } from './app-routing.module';
import { AppComponent } from './app.component';
import { GalleryModule } from "./gallery/gallery.module";

@NgModule({
    declarations: [
        AppComponent
    ],
    imports: [
        BrowserModule.withServerTransition({
            appId: 'angullary'
        }),
        BrowserAnimationsModule,
        AppRoutingModule,
        GalleryModule,
    ],
    providers: [],
    bootstrap: [AppComponent]
})
export class AppModule {
    constructor(@Inject(PLATFORM_ID) private platformId: Object,
                @Inject(APP_ID) private appId: string) {
        const platform = isPlatformBrowser(platformId) ?
            'in the browser' : 'on the server';
        console.log(`Running ${platform} with appId=${appId}`);
    }
}