error using isBrowser function in angular universal - angular-universal

Question

I'm trying to use the isBrowser function in angular universal but I keep getting the same error when I build. I did install the npm package of angular-universal
npm i angular2-universal --save
'ng build -prod -aot'
ERROR in Illegal state: symbol without members expected, but got {"filePath":"C:/dir/universal/website/node_modules/#angular/platform-browser/platform-browser.d.ts","name":"__platform_browser_private__","members":["BROWSER_SANITIZATION_PROVIDERS"]}.
ERROR in ./src/main.ts
Module not found: Error: Can't resolve './$$_gendir/app/app.module.ngfactory' in 'C:/dir/universal/website\src'
# ./src/main.ts 4:0-74
# multi ./src/main.ts
this is my app.module.ts:
//modules
import { HomeModule } from './home/home.module';
import { IntakeFormulierModule } from './intake-formulier/intake-formulier.module';
import { BrowserModule } from '#angular/platform-browser';
import { UniversalModule } from 'angular2-universal/browser';
import { NgModule } from '#angular/core';
//routing
import { routing } from "./app.routing";
//pages
import { AppComponent } from './app.component';
//isbrowser
import { isBrowser } from 'angular2-universal';
#NgModule({
declarations: [
AppComponent,
],
imports: [
BrowserModule.withServerTransition({
appId: 'website-u - (starter)'
}),
HomeModule,
IntakeFormulierModule,
routing,
],
providers: [
{ provide: 'isBrowser', useValue: isBrowser }
],
bootstrap: [AppComponent]
})
export class AppModule { }
this is my app/home/landing/landing.ts
import { Component, Inject } from '#angular/core';
import { Router } from '#angular/router';
#Component({
...
})
export class LandingComponent {
constructor(//public updateTop: TopImageUpdateService,
public router: Router,
#Inject('isBrowser') public isBrowser: boolean) {}
navigateToResults(name) {
if (this.isBrowser) {
let scrollToTop = window.setInterval(() => {
let pos = window.pageYOffset;
if (pos > 0) {
window.scrollTo(0, pos - 10); // how far to scroll on each step
} else {
window.clearInterval(scrollToTop);
this.router.navigate(['home/page', name]);
}
}, 9)
}
}
}

Answer 1

It looks like they are using isPlatformBrowser() instead of isBrowser() in the angular universal example.
https://github.com/angular/universal#universal-gotchas
import { Component, Inject, PLATFORM_ID, OnInit } from '#angular/core';
import { isPlatformBrowser, isPlatformServer } from '#angular/common';
#Component({
selector: 'app-root',
templateUrl: './app.component.html',
styleUrls: ['./app.component.css'],
})
export class AppComponent implements {
constructor(
#Inject(PLATFORM_ID) private platformId: Object
){
}
ngOnInit(){
if (isPlatformBrowser(this.platformId)) {
//Client only code.
} else {
//Server only code.
}
}
}