Angular2 - Quickstart Angular2 with angular.io

2016/5/314 min read
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Learn Angular2 from angular.io's QuickStart Example

So I'm trying to learn Angular by checking angular.io's QuickStart Example. Once you get all the files as following, index.html,package.json,styles.css,systemjs.config.js,tsconfig.json,typings.json. Also, you'll need main.ts and app.component.ts, but you can get all these files at Angular quickstart. I'll list my files here which I copied from angular.io because the code here you can reference what's file are using.

Once you got all files, run npm install so you can all npm modules, then run npm start you should be see site by running at http://localhost:3000. You might see following issue as... 

zone.js:101 GET http://localhost:3000/node_modules/@angular/platform-browser-dynamic/platform-browser-dynamic.umd.js 404 (Not Found)scheduleTask @ zone.js:101ZoneDelegate.scheduleTask @ zone.js:336Zone.scheduleMacroTask @ zone.js:273(anonymous function) @ zone.js:122send @ VM146:3fetchTextFromURL @ system.src.js:1156(anonymous function) @ system.src.js:1739ZoneAwarePromise @ zone.js:584(anonymous function) @ system.src.js:1738(anonymous function) @ system.src.js:2764(anonymous function) @ system.src.js:3338(anonymous function) @ system.src.js:3605(anonymous function) @ system.src.js:3990(anonymous function) @ system.src.js:4453(anonymous function) @ system.src.js:4705(anonymous function) @ system.src.js:408ZoneDelegate.invoke @ zone.js:323Zone.run @ zone.js:216(anonymous function) @ zone.js:571ZoneDelegate.invokeTask @ zone.js:356Zone.runTask @ zone.js:256drainMicroTaskQueue @ zone.js:474ZoneTask.invoke @ zone.js:426
(index):17 Error: Error: XHR error (404 Not Found) loading http://localhost:3000/node_modules/@angular/platform-browser-dynamic/platform-browser-dynamic.umd.js(…)(anonymous function) @ (index):17ZoneDelegate.invoke @ zone.js:323Zone.run @ zone.js:216(anonymous function) @ zone.js:571ZoneDelegate.invokeTask @ zone.js:356Zone.runTask @ zone.js:256drainMicroTaskQueue @ zone.js:474ZoneTask.invoke @ zone.js:426
zone.js:101 GET http://localhost:3000/node_modules/@angular/core/core.umd.js 404 (Not Found)

This is because the file systemjs.config.js is missing '/bundles/', looks like the current https://angular.io/docs/ts/latest/quickstart.html# already has the code, but that's why for the umd.js is missing issue. 

  function packUmd(pkgName) {
    packages['@angular/'+pkgName] = { main: '/bundles/' + pkgName + '.umd.js', defaultExtension: 'js' };
  }

Also, when you run the site and once you see the text 'My First Angular 2 App', check the console window, if you have log says. 

(index):17 Error: ReferenceError: enableProdMode is not defined(…)

You can add following code to enable it.

// at main.ts
import { bootstrap }    from '@angular/platform-browser-dynamic';
import { AppComponent } from './app.component';
// add following two lines
import {enableProdMode} from '@angular/core';
enableProdMode();
bootstrap(AppComponent);

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="systemjs.config.js"></script>
    <script>
      System.import('app').catch(function(err){ console.error(err); });
    </script>
  </head>
  <!-- 3. Display the application -->
  <body>
    <my-app>Loading...</my-app>
  </body>
</html>

package.json

{
  "name": "angular2-quickstart",
  "version": "1.0.0",
  "scripts": {
    "start": "tsc && concurrently \"npm run tsc:w\" \"npm run lite\" ",
    "lite": "lite-server",
    "postinstall": "typings install",
    "tsc": "tsc",
    "tsc:w": "tsc -w",
    "typings": "typings"
  },
  "license": "ISC",
  "dependencies": {
    "@angular/common":  "2.0.0-rc.2",
    "@angular/compiler":  "2.0.0-rc.2",
    "@angular/core":  "2.0.0-rc.2",
    "@angular/http":  "2.0.0-rc.2",
    "@angular/platform-browser":  "2.0.0-rc.2",
    "@angular/platform-browser-dynamic":  "2.0.0-rc.2",
    "@angular/router":  "2.0.0-rc.2",
    "@angular/router-deprecated":  "2.0.0-rc.2",
    "@angular/upgrade":  "2.0.0-rc.2",
    "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",
    "angular2-in-memory-web-api": "0.0.12",
    "bootstrap": "^3.3.6"
  },
  "devDependencies": {
    "concurrently": "^2.0.0",
    "lite-server": "^2.2.0",
    "typescript": "^1.8.10",
    "typings":"^1.0.4"
  },
  "description": "asdf",
  "repository": "sss"
}

systemjs.config.js

/**
 * 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);

tsconfig.json

{
  "compilerOptions": {
    "target": "es5",
    "module": "commonjs",
    "moduleResolution": "node",
    "sourceMap": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "removeComments": false,
    "noImplicitAny": false
  }
}

typings.json

{
  "globalDependencies": {
    "core-js": "registry:dt/core-js#0.0.0+20160317120654",
    "jasmine": "registry:dt/jasmine#2.2.0+20160505161446",
    "node": "registry:dt/node#4.0.0+20160509154515"
  }
}

main.ts

import { bootstrap }    from '@angular/platform-browser-dynamic';
import { AppComponent } from './app.component';
import {enableProdMode} from '@angular/core';
enableProdMode();
bootstrap(AppComponent);

app.component.ts

import { Component } from '@angular/core';
enableProdMode();
@Component({
  selector: 'my-app',
  template: '<h1>My First Angular 2 App2</h1>'
})
export class AppComponent { }

Get quickstart from github

Also, you can get all these code from github, which is most update to date, https://github.com/angular/quickstart.

To start use this is easy, you'll need to git clone https://github.com/angular/quickstart, then run npm install, and run npm start, the github is also contains the unitest.

Angular2

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