Visual Studio Code——Angular2 Hello World 之 2.0

　　最近看到一篇用Visual Studio Code开发Angular2的文章，也是一篇入门教程，地址为：使用Visual Studio Code開發Angular 2專案。这里按部就班的做了一遍，感觉很方便，并且没有遇到楼主的一些问题，应该是安装环境有些不同。这里只为记录一下。再次感谢！

　　一、随便新建一个目录，这里为：F:\Visual Studio Code\angular2_1，并用Visual Studio Code

　　二、依次新建如下四个文件，参考https://angular.cn/docs/ts/latest/quickstart.html

　　　 package.json 用来标记出本项目所需的 npm 依赖包。

　　tsconfig.json 定义了 TypeScript 编译器如何从项目源文件生成 JavaScript 代码。

　　　　typings.json 为那些 TypeScript 编译器无法识别的库提供了别的定义文件。

　　　　 systemjs.config.js 为模块加载器提供了该到哪里查找应用模块的信息，并注册了所有必备的依赖包。它还包括文档中后面的例子需要用到的包。

 1 {
 2   "name": "angular-quickstart",
 3   "version": "1.0.0",
 4   "scripts": {
 5     "start": "tsc && concurrently \"tsc -w\" \"lite-server\" ",
 6     "lite": "lite-server",
 7     "postinstall": "typings install",
 8     "tsc": "tsc",
 9     "tsc:w": "tsc -w",
10     "typings": "typings"
11   },
12   "license": "ISC",
13   "dependencies": {
14     "@angular/common": "~2.0.1",
15     "@angular/compiler": "~2.0.1",
16     "@angular/core": "~2.0.1",
17     "@angular/forms": "~2.0.1",
18     "@angular/http": "~2.0.1",
19     "@angular/platform-browser": "~2.0.1",
20     "@angular/platform-browser-dynamic": "~2.0.1",
21     "@angular/router": "~3.0.1",
22     "@angular/upgrade": "~2.0.1",
23     "angular-in-memory-web-api": "~0.1.1",
24     "bootstrap": "^3.3.7",
25     "core-js": "^2.4.1",
26     "reflect-metadata": "^0.1.8",
27     "rxjs": "5.0.0-beta.12",
28     "systemjs": "0.19.39",
29     "zone.js": "^0.6.25"
30   },
31   "devDependencies": {
32     "concurrently": "^3.0.0",
33     "lite-server": "^2.2.2",
34     "typescript": "^2.0.3",
35     "typings":"^1.4.0"
36   }
37 }

package.json

 1 {
 2   "compilerOptions": {
 3     "target": "es5",
 4     "module": "commonjs",
 5     "moduleResolution": "node",
 6     "sourceMap": true,
 7     "emitDecoratorMetadata": true,
 8     "experimentalDecorators": true,
 9     "removeComments": false,
10     "noImplicitAny": false
11   }
12 }

tsconfig.json

1 {
2   "globalDependencies": {
3     "core-js": "registry:dt/core-js#0.0.0+20160725163759",
4     "jasmine": "registry:dt/jasmine#2.2.0+20160621224255",
5     "node": "registry:dt/node#6.0.0+20160909174046"
6   }
7 }

typings.json

 1 /**
 2  * System configuration for Angular samples
 3  * Adjust as necessary for your application needs.
 4  */
 5 (function (global) {
 6   System.config({
 7     paths: {
 8       // paths serve as alias
 9       ‘npm:‘: ‘node_modules/‘
10     },
11     // map tells the System loader where to look for things
12     map: {
13       // our app is within the app folder
14       app: ‘app‘,
15       // angular bundles
16       ‘@angular/core‘: ‘npm:@angular/core/bundles/core.umd.js‘,
17       ‘@angular/common‘: ‘npm:@angular/common/bundles/common.umd.js‘,
18       ‘@angular/compiler‘: ‘npm:@angular/compiler/bundles/compiler.umd.js‘,
19       ‘@angular/platform-browser‘: ‘npm:@angular/platform-browser/bundles/platform-browser.umd.js‘,
20       ‘@angular/platform-browser-dynamic‘: ‘npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic.umd.js‘,
21       ‘@angular/http‘: ‘npm:@angular/http/bundles/http.umd.js‘,
22       ‘@angular/router‘: ‘npm:@angular/router/bundles/router.umd.js‘,
23       ‘@angular/forms‘: ‘npm:@angular/forms/bundles/forms.umd.js‘,
24       // other libraries
25       ‘rxjs‘:                      ‘npm:rxjs‘,
26       ‘angular-in-memory-web-api‘: ‘npm:angular-in-memory-web-api‘,
27     },
28     // packages tells the System loader how to load when no filename and/or no extension
29     packages: {
30       app: {
31         main: ‘./main.js‘,
32         defaultExtension: ‘js‘
33       },
34       rxjs: {
35         defaultExtension: ‘js‘
36       },
37       ‘angular-in-memory-web-api‘: {
38         main: ‘./index.js‘,
39         defaultExtension: ‘js‘
40       }
41     }
42   });
43 })(this);

systemjs.config.js

　　三、按着“shift”键，右键项目文件夹，选择“在此处打开命令窗口（W）”，键入DOS命令窗口，键入”npm install“,截图如下：

　　下载了好多文件，依赖的类库可真多，之后的文件夹目录如下：

　　四、在根目录下新建app文件夹，并依次创建下面三个文件app.module.ts、app.component.ts、main.ts;并在根目录下新建html页面——index.html

1 import { NgModule }      from ‘@angular/core‘;
2 import { BrowserModule } from ‘@angular/platform-browser‘;
3 import { AppComponent }   from ‘./app.component‘;
4 @NgModule({
5   imports:      [ BrowserModule ],
6   declarations: [ AppComponent ],
7   bootstrap:    [ AppComponent ]
8 })
9 export class AppModule { }

app.module.ts

1 import { Component } from ‘@angular/core‘;
2 @Component({
3   selector: ‘my-app‘,
4   template: ‘<h1>My First Angular App</h1>‘
5 })
6 export class AppComponent { }

app.component.ts

1 import { platformBrowserDynamic } from ‘@angular/platform-browser-dynamic‘;
2 import { AppModule } from ‘./app.module‘;
3 const platform = platformBrowserDynamic();
4 platform.bootstrapModule(AppModule);

main.ts

 1 <html>
 2   <head>
 3     <title>Angular QuickStart</title>
 4     <meta charset="UTF-8">
 5     <meta name="viewport" content="width=device-width, initial-scale=1">
 6     <link rel="stylesheet" href="styles.css">
 7     <!-- 1. Load libraries -->
 8      <!-- Polyfill(s) for older browsers -->
 9     <script src="node_modules/core-js/client/shim.min.js"></script>
10     <script src="node_modules/zone.js/dist/zone.js"></script>
11     <script src="node_modules/reflect-metadata/Reflect.js"></script>
12     <script src="node_modules/systemjs/dist/system.src.js"></script>
13     <!-- 2. Configure SystemJS -->
14     <script src="systemjs.config.js"></script>
15     <script>
16       System.import(‘app‘).catch(function(err){ console.error(err); });
17     </script>
18   </head>
19   <!-- 3. Display the application -->
20   <body>
21     <my-app>Loading...</my-app>
22   </body>
23 </html>

index.html

　　五、按照如下截图，设定启动作业：