一步接一步开始angular2
配置webstrom开启Javascript所有新特性支持
File > Setting > Language&Frameworks > javascript > javascript language version "jsx-harmony"
配置typescript
File > Setting > Language&Frameworks > typescript > enable complier 并且点选use tsconfig.json
添加依赖的node模块，创建packjson.json文件
{
"name": "angular2-quickstart",
"version": "1.0.0",
"scripts": {
"tsc": "tsc",
"tsc:w": "tsc -w",
"lite": "lite-server",
"start": "concurrent \"npm run tsc:w\" \"npm run lite\" "
},
"license": "ISC",
"dependencies": {
"angular2": "2.0.0-beta.0",
"systemjs": "0.19.6",
"es6-promise": "^3.0.2",
"es6-shim": "^0.33.3",
"reflect-metadata": "0.1.2",
"rxjs": "5.0.0-beta.0",
"zone.js": "0.5.10"
},
"devDependencies": {
"concurrently": "^1.0.0",
"lite-server": "^1.3.1",
"typescript": "^1.7.3"
}
}
为typescript编译器创建配置tsconfig.json文件
{
"compilerOptions": {
"target": "ES5",
"module": "system",
"moduleResolution": "node",
"sourceMap": true,
"emitDecoratorMetadata": true,
"experimentalDecorators": true,
"removeComments": false,
"noImplicitAny": false
},
"exclude": [
"node_modules"
]
}
创建应用程序源码子文件夹
$ mkdir app
$ cd app
创建组件文件app/app.component.ts
import {Component} from 'angular2/core';
@Component({
selector: 'my-app',
template: '<h1>My First Angular 2 App</h1>'
})
export class AppComponent { }
添加引导app/boot.ts
import {bootstrap} from 'angular2/platform/browser'
import {AppComponent} from './app.component'
bootstrap(AppComponent);
添加index.html
$ cd ..
创建index.html
<html>
<head>
<title>Angular 2 QuickStart</title>
<!-- 1. Load libraries -->
<script src="node_modules/angular2/bundles/angular2-polyfills.js"></script>
<script src="node_modules/systemjs/dist/system.src.js"></script>
<script src="node_modules/rxjs/bundles/Rx.js"></script>
<script src="node_modules/angular2/bundles/angular2.dev.js"></script>
<!-- 2. Configure SystemJS -->
<script>
System.config({
packages: {
app: {
format: 'register',
defaultExtension: 'js'
}
}
});
System.import('app/boot')
.then(null, console.error.bind(console));
</script>
</head>
<!-- 3. Display the application -->
<body>
<my-app>Loading...</my-app>
</body>
</html>
编译并运行
$ Compile and run!
打开浏览器输入127.0.0.1:3000
为什么需要boot.js
因为Angular “core” 兼容全平台，的确，很多Angular应用程序都运行在浏览器端，很多时候我们从库中回调bootstrap 方法，使它可以在浏览器上更好的运行，但是它也有可能在不同环境中载入不同的组件，我们可能会在移动设备中载入Apache Cordova或NativeScript.我们希望应用程序有更好的性能，更适合seo优化，可以在不同的环境中载入不同的库
