200 lines
8.0 KiB
Plaintext
200 lines
8.0 KiB
Plaintext
include ../_util-fns
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:marked
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# Angular Modules (NgModules) have landed in Angular RC5!
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# Angular模块（NgModule）功能在Angular RC5中发布了！
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_Angular Modules_, also known as _NgModules_, are the powerful new way to organize and bootstrap your Angular application.
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*Angular模块*（也叫*NgModule*）是组织代码和引导应用的强力新途径。
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.l-sub-section
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:marked
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Read more in the ["RC5 and NgModules" announcement](https://angularjs.blogspot.com).
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要了解更多，参见["RC5和NgModule"正式发布](https://angularjs.blogspot.com)。
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Learn the details of NgModule in the [Angular Module](../guide/ngmodule.html) chapter.
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要深入了解NgModule，参见[Angular Module](../guide/ngmodule.html)页。
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:marked
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The new `@NgModule` decorator gives you module-level components, directives, and pipes without
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the need to specify them repeatedly in every component of your application.
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新的`@NgModule`装饰器让我们可以指定模块级的组件、指令和管道，而不需要在应用中的每个组件中都指定它们。
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The `@NgModule` metadata give the Angular compiler the context needed so that you can use the same code
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regardless of whether you are running Angular in [Ahead-of-time](../glossary.html#aot) or [Just
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in Time](../glossary.html#jit) mode.
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`@NgModule`元数据为Angular编译器提供了上下文环境，以便我们可以让同一套代码分别运行在[预编译AoT模式](../glossary.html#aot)或[即时编译JiT模式](../glossary.html#jit)。
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## How do I use them?
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## 如何使用？
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If you were previously writing an Angular application, your app should continue to work in RC5.
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We’ve worked hard to ensure that applications that worked with RC4 continue to work while you migrate.
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For this to work, we’re doing 2 things automatically for you:
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如果你曾经写过Angular应用，那么它应该仍然能在RC5中工作。
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我们付出了很多努力来确保RC4中的应用也能正常工作在RC5中。
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* We create an implicit `NgModule` for you as part of the `bootstrap()` command
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* 我们在`bootstrap()`命令中会为你创建一个隐式的`NgModule`
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* We automatically hoist your components, pipes, and directives
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* 我们会自动升级你的组件、管道和指令
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While your application will continue to work today,
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it’s important that you update your application to ensure future updates and deprecations don’t negatively affect you.
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To make it easier, you can think of the process as having 5 steps.
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虽然应用仍然能工作，但你最好还是升级下应用，以确保未来的升级和废弃的特性不会给你带来困扰。
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要让这项工作更容易，你可以遵循如下五个步骤：
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1. **Update to RC5** - Your application should continue to work without modification, but it’s important that you are running the latest version of Angular.
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1. **升级到RC5** - 你的应用不用修改也仍然能正常工作，但重点是你要运行在最新版本的Angular中。
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2. **Create an _NgModule_** - Create the root `NgModule` that you’ll use to bootstrap your application.
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2. **创建*NgModule*** - 创建一个根`NgModule`，你要用它来引导应用程序。
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3. **Update your bootstrap** - Bootstrap that module instead of your root component
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3. **升级你的引导代码** - 改成引导根模块，而不再是根组件
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4. **Update your 3rd party libraries** - Take advantage of the latest from Forms, Material, Http, and more
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4. **升级你的第三方库** - 获得最新版表单、Material设计、Http等模块的优点
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5. **Cleanup** - Clean up your code.
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The deprecated classes, methods and properties will be removed from Angular very soon.
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5. **清理** - 清理你的代码。那些被标记为废弃的类、方法和属性将很快从Angular中移除
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Prefer to look at code and diffs?
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Check out the upgrade in [one commit](https://github.com/StephenFluin/ngmodule-migration/commit/9f9c6ae099346e491fc31d77bf65ed440e1f164c).
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想看看代码级变更？
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那就来[这个提交](https://github.com/StephenFluin/ngmodule-migration/commit/9f9c6ae099346e491fc31d77bf65ed440e1f164c)吧。
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## 1. Update to RC5
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## 1. 升级到RC5
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If you use npm, you should be able to either update your `package.json` file and run `npm install`.
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Or alternatively you can run the following command:
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如果使用npm，那么你可以手动修改`package.json`文件并运行`npm install`命令，或者直接运行下列命令：
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code-example(format='.' language='bash').
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npm install @angular/{core,common,compiler,platform-browser,platform-browser-dynamic} --save
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:marked
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Update your optional libraries
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更新你的可选库
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code-example(format='.' language='bash').
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npm install @angular/router
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npm install @angular/forms
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npm install @angular2-material/{core,button,card,...}@latest
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:marked
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Update the Angular CLI if you're using that tool
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如果你在使用Angular CLI，也要更新它
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code-example(format='.' language='bash').
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npm install angular-cli @angular/tsc-wrapped --save-dev
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:marked
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## 2. Create an _NgModule_
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## 2. 创建*NgModule*
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Create a new file called app.module.ts. Populate it with your root component as follows:
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创建一个名叫`app.module.ts`的新文件，把以前的根组件换成这样：
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code-example(format='.' language='javascript').
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import { NgModule } from '@angular/core';
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import { BrowserModule } from '@angular/platform-browser';
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import { AppComponent } from './app.component';
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@NgModule({
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declarations: [AppComponent],
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imports: [BrowserModule],
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bootstrap: [AppComponent],
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})
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export class AppModule {}
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:marked
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## 3. Update your bootstrap
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## 3. 升级你的引导代码
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Update your `main.ts` file to bootstrap using the "Just-in-time" (JiT) compiler.
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升级`main.ts`文件，改用即时（JiT）编译器来引导。
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code-example(format='.' language='javascript').
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import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
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import { AppModule } from './app/app.module';
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platformBrowserDynamic().bootstrapModule(AppModule);
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:marked
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## 4. Import library modules in your _NgModule_
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## 4. 在*NgModule*中导入库模块
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Remove the Angular and 3rd party library providers from your `AppComponent` providers
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and switch to `NgModule` imports as seen in this example.
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从你的`AppComponent`的`providers`中移除Angular和第三方库中的服务提供商，改为使用`NgModule`中的`imports`，就像这样：
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code-example(format='.' language='javascript').
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imports: [
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BrowserModule,
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// Router
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RouterModule.forRoot(config),
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// Forms
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FormsModule,
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// Material Design
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MdSlideToggleModule,
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MdButtonModule,
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MdToolbarModule,
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MdCardModule,
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MdInputModule,
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],
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:marked
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## 5. Cleanup
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## 5. 清理
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For RC5, you can leave your components, directives and pipes
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in the `directives` and `pipes` properties of your `@Component` metadata.
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In fact, we automatically hoist (add) them to the NgModule to which they belong.
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对于RC5来说，你仍然可以在`@Component`元数据的`directives`和`pipes`属性中指定组件、指令和管道。
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实际上，我们会自动把它们加入到它们所属的NgModule中去。
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.alert.is-important
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:marked
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This option is temporary for backward compatibility.
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It will be removed in the final release of Angular 2.0.
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这个选项只是为了向后兼容而临时设置的。
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当Angular 2.0正式发布的时候，它将会被移除。
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Get ahead of the game and start moving your component `directives` and `pipes`
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into module `declarations` as soon as possible.
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We intend to delete _all_ deprecated class, methods, and properties in the next RC.
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你可以先继续，但要尽早把这些组件、指令和管道移到模块的`declarations`中。
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我们准备在下一个RC中删除*所有*废弃的类、方法和属性。
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