Visual Studio Code——Angular2 Hello World 之 2.0

2023-02-23 07:40:43

　　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。

 {

   "name": "angular-quickstart",

   "version": "1.0.0",

   "scripts": {

     "start": "tsc && concurrently \"tsc -w\" \"lite-server\" ",

     "lite": "lite-server",

     "postinstall": "typings install",

     "tsc": "tsc",

     "tsc:w": "tsc -w",

     "typings": "typings"

   },

   "license": "ISC",

   "dependencies": {

     "@angular/common": "~2.0.1",

     "@angular/compiler": "~2.0.1",

     "@angular/core": "~2.0.1",

     "@angular/forms": "~2.0.1",

     "@angular/http": "~2.0.1",

     "@angular/platform-browser": "~2.0.1",

     "@angular/platform-browser-dynamic": "~2.0.1",

     "@angular/router": "~3.0.1",

     "@angular/upgrade": "~2.0.1",

     "angular-in-memory-web-api": "~0.1.1",

     "bootstrap": "^3.3.7",

     "core-js": "^2.4.1",

     "reflect-metadata": "^0.1.8",

     "rxjs": "5.0.0-beta.12",

     "systemjs": "0.19.39",

     "zone.js": "^0.6.25"

   },

   "devDependencies": {

     "concurrently": "^3.0.0",

     "lite-server": "^2.2.2",

     "typescript": "^2.0.3",

     "typings":"^1.4.0"

   }

 }

package.json

 {

   "compilerOptions": {

     "target": "es5",

     "module": "commonjs",

     "moduleResolution": "node",

     "sourceMap": true,

     "emitDecoratorMetadata": true,

     "experimentalDecorators": true,

     "removeComments": false,

     "noImplicitAny": false

   }

 }

tsconfig.json

 {

   "globalDependencies": {

     "core-js": "registry:dt/core-js#0.0.0+20160725163759",

     "jasmine": "registry:dt/jasmine#2.2.0+20160621224255",

     "node": "registry:dt/node#6.0.0+20160909174046"

   }

 }

typings.json

 /**

  * System configuration for Angular samples

  * Adjust as necessary for your application needs.

  */

 (function (global) {

   System.config({

     paths: {

       // paths serve as alias

       'npm:': 'node_modules/'

     },

     // map tells the System loader where to look for things

     map: {

       // our app is within the app folder

       app: 'app',

       // angular bundles

       '@angular/core': 'npm:@angular/core/bundles/core.umd.js',

       '@angular/common': 'npm:@angular/common/bundles/common.umd.js',

       '@angular/compiler': 'npm:@angular/compiler/bundles/compiler.umd.js',

       '@angular/platform-browser': 'npm:@angular/platform-browser/bundles/platform-browser.umd.js',

       '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic.umd.js',

       '@angular/http': 'npm:@angular/http/bundles/http.umd.js',

       '@angular/router': 'npm:@angular/router/bundles/router.umd.js',

       '@angular/forms': 'npm:@angular/forms/bundles/forms.umd.js',

       // other libraries

       'rxjs':                      'npm:rxjs',

       'angular-in-memory-web-api': 'npm:angular-in-memory-web-api',

     },

     // packages tells the System loader how to load when no filename and/or no extension

     packages: {

       app: {

         main: './main.js',

         defaultExtension: 'js'

       },

       rxjs: {

         defaultExtension: 'js'

       },

       'angular-in-memory-web-api': {

         main: './index.js',

         defaultExtension: 'js'

       }

     }

   });

 })(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

 import { NgModule }      from '@angular/core';

 import { BrowserModule } from '@angular/platform-browser';

 import { AppComponent }   from './app.component';

 @NgModule({

   imports:      [ BrowserModule ],

   declarations: [ AppComponent ],

   bootstrap:    [ AppComponent ]

 })

 export class AppModule { }

app.module.ts

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

 @Component({

   selector: 'my-app',

   template: '<h1>My First Angular App</h1>'

 })

 export class AppComponent { }

app.component.ts

 import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';

 import { AppModule } from './app.module';

 const platform = platformBrowserDynamic();

 platform.bootstrapModule(AppModule);

main.ts

 <html>

   <head>

     <title>Angular 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>