第一个Angular2的样例

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欢迎跟我一起学习Angular2

本文根据angular2官网手动敲码得来：
本文地址：http://blog.csdn.net/sushengmiyan
本文作者：苏生米沿
- 开发环境搭建
- 配置文件
- 安装依赖包
- *创建基础应用
- 创建组件
- 创建启动页面
- 编译启动

---

环境搭建

安装 Node.js and npm 。

1. nodejs 下载地址 https://nodejs.org/download输入 node - v 显示当前版本号

2. 新版的NodeJS已经集成了npm，所以之前npm也一并安装好了。同样可以使用cmd命令行中键入 npm –v

配置文件

1. package.json
2. tsconfig.json
3. typings.json
4. systemjs.config.js

package.json代码块

如下：

{
  "name": "angular-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",
    "@angular/compiler": "2.0.0",
    "@angular/core": "2.0.0",
    "@angular/forms": "2.0.0",
    "@angulartp": "2.0.0",
    "@angular/platform-browser": "2.0.0",
    "@angular/platform-browser-dynamic": "2.0.0",
    "@angular/router": "3.0.0",
    "@angular/upgrade": "2.0.0",
    "core-js": "^2.4.1",
    "reflect-metadata": "^0.1.3",
    "rxjs": "5.0.0-beta.12",
    "systemjs": "0.19.27",
    "zone.js": "^0.6.23",
    "angular2-in-memory-web-api": "0.0.20",
    "bootstrap": "^3.3.6"
  },
  "devDependencies": {
    "concurrently": "^2.2.0",
    "lite-server": "^2.2.2",
    "typescript": "^2.0.2",
    "typings":"^1.3.2"
  }
}

tsconfig.json代码块

如下：

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

typings.json代码块

如下：

{
  "globalDependencies": {
    "core-js": "registry:dt/core-js#0.0.0+20160725163759",
    "jasmine": "registry:dt/jasmine#2.2.0+20160621224255",
    "node": "registry:dtde#6.0.0+20160909174046"
  }
}

typings.json代码块

如下：

/**
 * 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/corendles/core.umd.js',
      '@angular/common': 'npm:@angular/commonndles/common.umd.js',
      '@angular/compiler': 'npm:@angular/compilerndles/compiler.umd.js',
      '@angular/platform-browser': 'npm:@angular/platform-browserndles/platform-browser.umd.js',
      '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamicndles/platform-browser-dynamic.umd.js',
      '@angulartp': 'npm:@angulartpndlestp.umd.js',
      '@angular/router': 'npm:@angular/routerndles/router.umd.js',
      '@angular/forms': 'npm:@angular/formsndles/forms.umd.js',
      // other libraries
      'rxjs':                       'npm:rxjs',
      'angular2-in-memory-web-api': 'npm:angular2-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'
      },
      'angular2-in-memory-web-api': {
        main: './index.js',
        defaultExtension: 'js'
      }
    }
  });
})(this);

安装依赖包

在工程目录文件下运行npm install。
中间会比较慢，等待。没有出现npm ERR!就说明安装成功。
程序会自动安装typings。
即在项目文件夹下可以看到多出来的node_modules和typings文件夹。如果typings没有自动安装，则运行 npm run typings install 手动安装。

创建基础模块

在工程目录下创建一个app文件夹，创建一个根模块suos.module.ts文件，angular2的每个应用应该有一个根模块。
Suos.module.ts内容如下：

import { NgModule } from '@angular/core';
import{BrowserModule}from'@angular/platform-browser';
@NgModule({
  imports:      [ BrowserModule ]
})
export class SuosModule { }

创建基础组件

每个angular2应用至少由一个根组件。这里我们创建一个SuosComponent。在app目录下创建suos.component.ts 代码如下：

import { Component } from '@angular/core';
@Component({
  selector: 'suosstart',
  template: '<h1>Suos样例工程</h1>'
})
export class SuosComponent { }

创建启动类

import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { SuosModule } from './suos.module';
const platform = platformBrowserDynamic();
platform.bootstrapModule(SuosModule);

创建启动页面

index.html

<html>
  <head>
    <title>Suos启动测试</title>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="style.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>
    <suosstart>加载中...</suosstart>
  </body>
</html>

其中style.css样式内容如下：

/* Master Styles */
h1 {
  color: #369;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 250%;
}
h2, h3 {
  color: #444;
  font-family: Arial, Helvetica, sans-serif;
  font-weight: lighter;
}
body {
  margin: 2em;
}

启动应用

npm start 会自动启动浏览器，看到出现结果页面如下即表明启动成功：

目录