Angular2/ASP.NET - "No ResourceLoader implementation has been provided. Can't read the URL"

Question

I'm trying to build my own Angular 2/ASP.NET SPA on Visual Studio. You can find all the files here.

What I tried to do is simple: after I followed the instructions to set up the app here, I began to add in my own files in an attempt to do some basic routing and I deleted some superfluous files. I have ClientApp/app/app.module.ts bootstrapping ClientApp/app/components/app/app.component.ts, and the only route is ClientApp/app/components/app/test.component.ts

Unfortunately, I got this error:

An unhandled exception occurred while processing the request.

Exception: Call to Node module failed with error: Error: No ResourceLoader implementation has been provided. Can't read the url "app.component.html"
at Object.get (C:\Users\Student\Source\Workspaces\mvs\Test2\Test2\node_modules\@angular\compiler\bundles\compiler.umd.js:17454:17)
at DirectiveNormalizer._fetch (C:\Users\Student\Source\Workspaces\mvs\Test2\Test2\node_modules\@angular\compiler\bundles\compiler.umd.js:13455:45)
at DirectiveNormalizer.normalizeTemplateAsync (C:\Users\Student\Source\Workspaces\mvs\Test2\Test2\node_modules\@angular\compiler\bundles\compiler.umd.js:13498:23)
at DirectiveNormalizer.normalizeDirective (C:\Users\Student\Source\Workspaces\mvs\Test2\Test2\node_modules\@angular\compiler\bundles\compiler.umd.js:13473:46)
at RuntimeCompiler._createCompiledTemplate (C:\Users\Student\Source\Workspaces\mvs\Test2\Test2\node_modules\@angular\compiler\bundles\compiler.umd.js:16869:210)
at C:\Users\Student\Source\Workspaces\mvs\Test2\Test2\node_modules\@angular\compiler\bundles\compiler.umd.js:16807:43
at Array.forEach (native)
at C:\Users\Student\Source\Workspaces\mvs\Test2\Test2\node_modules\@angular\compiler\bundles\compiler.umd.js:16805:50
at Array.forEach (native)
at RuntimeCompiler._compileComponents (C:\Users\Student\Source\Workspaces\mvs\Test2\Test2\node_modules\@angular\compiler\bundles\compiler.umd.js:16804:45)

Everything looks right to me, but I'm new to both Angular 2 and ASP.NET, so I don't know if it is a compiler issue or human error. Here is some of the code, if you need more information the link to the repo is at the top of this question.

ClientApp/app/app.module.ts

import { NgModule } from '@angular/core';
import { RouterModule } from '@angular/router';
import { UniversalModule } from 'angular2-universal';
import { AppComponent } from './components/app/app.component';
import { TestComponent } from './components/app/test.component';

@NgModule({
    bootstrap: [ AppComponent ],
    declarations: [
        AppComponent,
        TestComponent
    ],
    imports: [
        UniversalModule, // Must be first import. This automatically imports BrowserModule, HttpModule, and JsonpModule too.
        RouterModule.forRoot([
            { path: 'test', component: TestComponent },
            { path: '', redirectTo: 'test', pathMatch: 'full' },
            { path: '**', redirectTo: 'test' }
        ])
    ]
})
export class AppModule {
}

ClientApp/app/components/app/app.component.ts

import { Component, Input } from '@angular/core';

@Component({
    selector: 'app',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css']
})
export class AppComponent {
}

ClientApp/app/components/app/test.component.ts

import {Component, Input, OnInit} from '@angular/core';

@Component({
    templateUrl: './test.component.html',
    styleUrls: ['./test.component.css']
})

export class TestComponent implements OnInit {
    testing: String;

    ngOnInit(): void {
        this.testing = "This Works";
    }
}

Answer 1

The UniversalModule currently requires that external assets for templates and styles use require().

Try changing templateUrl: './test.component.html' to template: require('./test.component.html').

And styleUrls: ['./test.component.css'] to styles: [require('./test.component.css')]

More details on the issue can be found here: Unable to load assets without using require()

For reference, here is the issue thread from Angular on Github: track runtime styleUrls. They recommend using the angular2-template-loader.