Issue encountered when trying to integrate Angular2 with Visual Studio 2015 Update

Starting my journey with Angular2 in Visual Studio 2015. Following advice from this helpful article.

Encountering an issue when running the index.html file, it gets stuck on 'Loading...'.

Here are the key configurations and code files being used. Package.json file:

{
  "name": "WebApplication8",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",

  "dependencies": {
    "@angular/common": "2.0.0-rc.1",
    "@angular/compiler": "2.0.0-rc.1",
    "@angular/core": "2.0.0-rc.1",
    "@angular/http": "2.0.0-rc.1",
    "@angular/platform-browser": "2.0.0-rc.1",
    "@angular/platform-browser-dynamic": "2.0.0-rc.1",
    "@angular/router": "2.0.0-rc.1",
    "@angular/router-deprecated": "2.0.0-rc.1",
    "@angular/upgrade": "2.0.0-rc.1",
    "systemjs": "0.19.27",
    "core-js": "^2.4.0",
    "reflect-metadata": "^0.1.3",
    "rxjs": "5.0.0-beta.6",
    "zone.js": "^0.6.12"

  },
  "devDependencies": {
    "typings": "^1.0.4"
  },

  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC"
}

Startup.js file:

/**
 * System configuration for Angular 2 samples
 * Adjust as necessary for your application needs.
 */
(function (global) {
    // map tells the System loader where to look for things
    var map = {
        'app': 'app', // 'dist',
        '@angular': 'node_modules/@angular',
        'angular2-in-memory-web-api': 'node_modules/angular2-in-memory-web-api',
        'rxjs': 'node_modules/rxjs'
    };
    // packages tells the System loader how to load when no filename and/or no extension
    var packages = {
        'app': { main: 'main.js', defaultExtension: 'js' },
        'rxjs': { defaultExtension: 'js' },
        'angular2-in-memory-web-api': { main: 'index.js', defaultExtension: 'js' },
    };
    var ngPackageNames = [
      'common',
      'compiler',
      'core',
      'http',
      'platform-browser',
      'platform-browser-dynamic',
      'router',
      'router-deprecated',
      'upgrade',
    ];
    // Individual files (~300 requests):
    function packIndex(pkgName) {
        packages['@angular/' + pkgName] = { main: 'index.js', defaultExtension: 'js' };
    }
    // Bundled (~40 requests):
    function packUmd(pkgName) {
        packages['@angular/' + pkgName] = { main: 'bundles/' + pkgName + '.umd.js', defaultExtension: 'js' };
    }
    // Most environments should use UMD; some (Karma) need the individual index files
    var setPackageConfig = System.packageWithIndex ? packIndex : packUmd;
    // Add package entries for angular packages
    ngPackageNames.forEach(setPackageConfig);
    var config = {
        map: map,
        packages: packages
    };
    System.config(config);
})(this);

app.components.ts:

import { Component } from '@angular/core';
@Component({
    selector: 'my-app',
    template: '<h1>My First Angular 2 App</h1>'
})
export class AppComponent { }

And index.html:

<html>
<head>
    <title>Angular 2 QuickStart</title>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="styles.css">
    <!-- 1. Load libraries -->
    <!-- Polyfill(s) for older browsers -->
    <script src="node_modules/core-js/client/shim.min.js"></script>
    <script src="node_modules/zone.js/dist/zone.js"></script>
    <script src="node_modules/reflect-metadata/Reflect.js"></script>
    <script src="node_modules/systemjs/dist/system.src.js"></script>
    <!-- 2. Configure SystemJS -->
    <script src="startup.js"></script>
    <script>
      System.import('app').catch(function(err){ console.error(err); });
    </script>
</head>
<!-- 3. Display the application -->
<body>
    Test
    <br />

    <my-app>Loading...</my-app>
</body>
</html>

Screenshots obtained while debugging using Firebug: https://i.stack.imgur.com/qEpbD.png

https://i.stack.imgur.com/obJkw.png

Gulp.js file:

var gulp = require('gulp');

gulp.task('thirdparty', function () {
    gulp.src('./node_modules/core-js/**/*.js')
        .pipe(gulp.dest('./wwwroot/node_modules/core-js'));
    gulp.src('./node_modules/@angular/**/*.js')
        .pipe(gulp.dest('./wwwroot/node_modules/@angular'));
    gulp.src('./node_modules/zone.js/**/*.js')
        .pipe(gulp.dest('./wwwroot/node_modules/zone.js'));
    gulp.src('./node_modules/systemjs/**/*.js')
        .pipe(gulp.dest('./wwwroot/node_modules/systemjs'));
    gulp.src('./node_modules/reflect-metadata/**/*.js')
        .pipe(gulp.dest('./wwwroot/node_modules/reflect-metadata'));
    gulp.src('./node_modules/rxjs/**/*.js')
        .pipe(gulp.dest('./wwwroot/node_modules/rxjs'));

});

gulp.task('copy', function () {
    gulp.src('./app/**/*.*')
        .pipe(gulp.dest('./wwwroot/app'));
});

gulp.task('watch', function () {
    gulp.watch('./app/**/*.*', ['copy']);
});

gulp.task('default', ['thirdparty', 'copy', 'watch']);

Answer №1

If you're looking to explore the latest Angular 2 RC bits and ASP.NET Core 1.0 RTM, check out this link which also includes a GITHUB repo:

Answer №2

I finally found the solution after much searching and experimenting. I wanted to share it here in case it helps anyone else dealing with a similar issue.

With Visual Studio 2015 Update 3, TypeScript 1.8.35.0, and npm version 3.10.6, I realized I needed to update my npm version to the latest one based on some online recommendations. After updating, I made changes to my package.json file. For example, I updated the line from "@angular/core": "2.0.0-rc.1", to "@angular/core": "2.0.0-rc.4",.

After these edits, my final package.json looked like this:

{
  "name": "WebApplication8",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",

  "dependencies": {
    "@angular/common": "2.0.0-rc.4",
    "@angular/compiler": "2.0.0-rc.4",
    "@angular/core": "2.0.0-rc.4",
    "@angular/http": "2.0.0-rc.4",
    "@angular/platform-browser": "2.0.0-rc.4",
    "@angular/platform-browser-dynamic": "2.0.0-rc.4",
    "@angular/router": "2.0.0-rc.1",
    "@angular/router-deprecated": "2.0.0-rc.1",
    "@angular/upgrade": "2.0.0-rc.1",
    "systemjs": "0.19.27",
    "core-js": "^2.4.0",
    "reflect-metadata": "^0.1.3",
    "rxjs": "5.0.0-beta.6",
    "zone.js": "^0.6.12"
  },
  "devDependencies": {
    "typings": "^1.0.4"
  },

  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC"
}

Remember to give Visual Studio some time to restore/install all dependencies after saving the file.

And voilà, it worked! The message displayed was:

My First Angular 2 App

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