review: ngmodule(line 1672)
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@ -774,9 +774,11 @@ a#application-scoped-providers
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:marked
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:marked
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Try the example:
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Try the example:
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试试这个例子:
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<live-example embedded plnkr="contact.1b" img="devguide/ngmodule/contact-1b-plunker.png"></live-example>
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<live-example embedded plnkr="contact.1b" img="devguide/ngmodule/contact-1b-plunker.png"></live-example>
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<live-example plnkr="contact.1b">试试这个在线例子</live-example>
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a#resolve-conflicts
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a#resolve-conflicts
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.l-main-section
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.l-main-section
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@ -788,7 +790,7 @@ a#resolve-conflicts
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We ran into trouble [above](#import-name-conflict) when we declared the contact's `HighlightDirective` because
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We ran into trouble [above](#import-name-conflict) when we declared the contact's `HighlightDirective` because
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we already had a `HighlightDirective` class at the application level.
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we already had a `HighlightDirective` class at the application level.
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[以前](#import-name-conflict)我们要声明联系人的`HighlightDirective`指令时遇到了问题,因为在应用程序一级已经有了一个`HighlightDirective`类。
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[以前](#import-name-conflict)我们在声明联系人的`HighlightDirective`指令时遇到了问题,因为在应用程序一级已经有了一个`HighlightDirective`类。
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That both directives have the same name smells of trouble.
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That both directives have the same name smells of trouble.
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@ -824,7 +826,7 @@ a#resolve-conflicts
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:marked
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:marked
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The real problem is that there are _two different classes_ trying to do the same thing.
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The real problem is that there are _two different classes_ trying to do the same thing.
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真正的问题在于,有_两个不同的类_视图做同一件事。
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真正的问题在于,有_两个不同的类_试图做同一件事。
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It's OK to import the _same_ directive class multiple times.
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It's OK to import the _same_ directive class multiple times.
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Angular removes duplicate classes and only registers one of them.
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Angular removes duplicate classes and only registers one of them.
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@ -871,7 +873,7 @@ a#feature-modules
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* The root `AppModule` grows larger with each new application class and shows no signs of stopping.
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* The root `AppModule` grows larger with each new application class and shows no signs of stopping.
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* 随着一个个类被加入应用中,根模块`AppModule`变大了,并且看起来还会继续变大。
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* 随着一个个类被加入应用中,根模块`AppModule`变大了,并且还会继续变大。
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* We have conflicting directives.
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* We have conflicting directives.
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@ -922,7 +924,7 @@ a#feature-modules
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2. A feature module can expose or hide its implementation from other modules.
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2. A feature module can expose or hide its implementation from other modules.
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2. 特性模块可以暴露或隐藏来自其它模块的实现。
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2. 特性模块可以对其他模块暴露或隐藏自己的实现。
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Otherwise, a feature module is distinguished primarily by its intent.
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Otherwise, a feature module is distinguished primarily by its intent.
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@ -958,7 +960,7 @@ a#feature-modules
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It's easy to refactor the contact material into a contact feature module.
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It's easy to refactor the contact material into a contact feature module.
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把与联系人有关的这些编程元素重构到“联系人”特性模块中很简单。
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把与联系人有关的这些元素重构到“联系人”特性模块中很简单。
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1. Create the `ContactModule` in the `app/contact` folder.
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1. Create the `ContactModule` in the `app/contact` folder.
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@ -966,7 +968,7 @@ a#feature-modules
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1. Move the contact material from `AppModule` to `ContactModule`.
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1. Move the contact material from `AppModule` to `ContactModule`.
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1. 把联系人相关的编程元素从`AppModule`移到`ContactModule`中。
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1. 把联系人相关的元素从`AppModule`移到`ContactModule`中。
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1. Replace the imported `BrowserModule` with `CommonModule`.
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1. Replace the imported `BrowserModule` with `CommonModule`.
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@ -978,7 +980,7 @@ a#feature-modules
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`AppModule` is the only _existing_ class that changes. But we do add one new file.
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`AppModule` is the only _existing_ class that changes. But we do add one new file.
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改完之后`AppModule`只剩下了这个类本身,不过我们还会添加一个新文件。
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`AppModule`是唯一有改变的_已经存在_的类,不过我们还会添加一个新文件。
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### Add the _ContactModule_
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### Add the _ContactModule_
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@ -1008,13 +1010,13 @@ a#feature-modules
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当前模块不会继承其它模块中对组件、指令或管道的访问权。
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当前模块不会继承其它模块中对组件、指令或管道的访问权。
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`AppModule`中的imports与`ContatModule`的imports互不相干。
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`AppModule`中的imports与`ContatModule`的imports互不相干。
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如果`ContactComponent`要绑定到`[(ngModel)]`,它所在的`ContactModule`也同样得导入`FormsModule`。
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如果`ContactComponent`要绑定到`[(ngModel)]`,它所在的`ContactModule`必需导入`FormsModule`。
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:marked
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:marked
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We also replaced `BrowserModule` by `CommonModule` for reasons explained in
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We also replaced `BrowserModule` by `CommonModule` for reasons explained in
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[an FAQ](../cookbook/ngmodule-faq.html#q-browser-vs-common-module).
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[an FAQ](../cookbook/ngmodule-faq.html#q-browser-vs-common-module).
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我们还用`CommonModule`替换了`BrowserModule`,其中缘由参见[这条FAQ](../cookbook/ngmodule-faq.html#q-browser-vs-common-module)。
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我们还用`CommonModule`替换了`BrowserModule`,其中缘由参见[这条常见问题](../cookbook/ngmodule-faq.html#q-browser-vs-common-module)。
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We _declare_ the contact component, directive, and pipe in the module `declarations`.
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We _declare_ the contact component, directive, and pipe in the module `declarations`.
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@ -1039,7 +1041,7 @@ a#feature-modules
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Return to the `AppModule` and remove everything specific to the contact feature set.
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Return to the `AppModule` and remove everything specific to the contact feature set.
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返回`AppModule`,并移除所有与联系人有关的内容。
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返回`AppModule`,移除所有与联系人有关的内容。
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Delete the contact import statements.
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Delete the contact import statements.
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Delete the contact declarations and contact providers.
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Delete the contact declarations and contact providers.
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@ -1072,7 +1074,7 @@ a#feature-modules
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:marked
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:marked
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There's a lot to like in the revised `AppModule`
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There's a lot to like in the revised `AppModule`
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修改后的`AppModule`中还有很多类似的修改
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修改后的`AppModule`有很令人喜欢的特征:
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* It does not change as the _Contact_ domain grows.
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* It does not change as the _Contact_ domain grows.
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@ -1133,11 +1135,9 @@ a#lazy-load
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.l-sub-section
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.l-sub-section
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:marked
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:marked
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Examine and download the complete source for this version from the
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Examine and download the complete source for this version from the <live-example plnkr="pre-shared.3" img="devguide/ngmodule/v3-plunker.png">live example.</live-example>
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<live-example plnkr="pre-shared.3" img="devguide/ngmodule/v3-plunker.png">live example.</live-example>
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到
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到<live-example plnkr="pre-shared.3" img="devguide/ngmodule/v3-plunker.png">在线例子</live-example>
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<live-example plnkr="pre-shared.3" img="devguide/ngmodule/v3-plunker.png">在线例子</live-example>
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试用并下载当前版本的完整代码。
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试用并下载当前版本的完整代码。
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:marked
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:marked
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@ -1167,11 +1167,11 @@ a#lazy-load
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<a id="app-component-template"></a>
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<a id="app-component-template"></a>
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Let's start at the top with the new `AppComponent` template:
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<a id="app-component-template"></a>
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a title, three links, and a `<router-outlet>`.
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我们从这个`AppComponent`新模板的顶部看起:
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Let's start at the top with the new `AppComponent` template: a title, three links, and a `<router-outlet>`.
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一个标题、三个链接和一个`<router-outlet>`。
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我们从这个`AppComponent`新模板的顶部看起:一个标题、三个链接和一个`<router-outlet>`。
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+makeExample('ngmodule/ts/app/app.component.3.ts', 'template', 'app/app.component.ts (v3 - Template)')(format='.')
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+makeExample('ngmodule/ts/app/app.component.3.ts', 'template', 'app/app.component.ts (v3 - Template)')(format='.')
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The `AppModule` has changed modestly:
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The `AppModule` has changed modestly:
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`AppModule`被改成了这样:
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`AppModule`被的修改很大:
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+makeExample('ngmodule/ts/app/app.module.3.ts', '', 'app/app.module.ts (v3)')
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+makeExample('ngmodule/ts/app/app.module.3.ts', '', 'app/app.module.ts (v3)')
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@ -1192,7 +1192,7 @@ a#lazy-load
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a difference with prior or future versions.
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a difference with prior or future versions.
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We'll explain differences that matter in due course.
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We'll explain differences that matter in due course.
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有些文件名带有`.3`扩展名,用以和以前/以后的版本区分开。
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有些文件名带有`.3`扩展名,用来和以前/以后的版本区分开。
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我们会在适当的时机解释它们的差异。
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我们会在适当的时机解释它们的差异。
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:marked
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:marked
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@ -1262,7 +1262,7 @@ a#lazy-load
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The last line calls the `forRoot` static class method of the `RouterModule`, passing in the configuration.
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The last line calls the `forRoot` static class method of the `RouterModule`, passing in the configuration.
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最后一行调用了`RouterModule`类的静态方法`forRoot`,并把此配置信息传给它。
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最后一行调用了`RouterModule`类的静态方法`forRoot`,并把路由配置信息传给它。
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+makeExample('ngmodule/ts/app/app.routing.ts', 'forRoot')(format='.')
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+makeExample('ngmodule/ts/app/app.routing.ts', 'forRoot')(format='.')
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The returned `routing` object is a `ModuleWithProviders` containing both the `RouterModule` directives
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The returned `routing` object is a `ModuleWithProviders` containing both the `RouterModule` directives
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and the Dependency Injection providers that produce a configured `Router`.
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and the Dependency Injection providers that produce a configured `Router`.
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该方法返回的`routing`是一个`ModuleWithProviders`对象,它包含了一些`RouterModule`的指令和一些服务提供商,它们用于生成配置好的`Router`实例。
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该方法返回的`routing`是一个`ModuleWithProviders`对象,它包含了一些`RouterModule`的指令和用来生成配置好的`Router`的依赖注入提供商。
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This `routing` object is intended for the app _root_ module _only_.
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This `routing` object is intended for the app _root_ module _only_.
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or an editor of a selected hero (`HeroDetail`).
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or an editor of a selected hero (`HeroDetail`).
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Both components delegate to the `HeroService` to fetch and save data.
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Both components delegate to the `HeroService` to fetch and save data.
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如果你读过[路由](router.html#child-routing-component)页,那么对这个子路由的场景应该觉得很熟悉。
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如果你读过[路由](router.html#child-routing-component)章,那么对这个子路由的场景应该觉得很熟悉。
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`HeroComponent`是本特性区的顶级组件和路由宿主。
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`HeroComponent`是本特性区的顶级组件和路由宿主。
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模板带有一个`<router-outlet>`指令,它或者显示英雄列表(`HeroList`)或者显示所选英雄的编辑器(`HeroDetail`)。
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模板带有一个`<router-outlet>`指令,它或者显示英雄列表(`HeroList`)或者显示所选英雄的编辑器(`HeroDetail`)。
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这两个组件都把获取和保存数据的任务委托给`HeroService`执行。
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这两个组件都把获取和保存数据的任务委托给`HeroService`执行。
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The `HeroModule` is a feature module like any other.
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The `HeroModule` is a feature module like any other.
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`HeroModule`是一个和特性模块,与其它的没什么不同。
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`HeroModule`是一个特性模块,与其它的没什么不同。
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+makeExample('ngmodule/ts/app/hero/hero.module.3.ts', 'class', 'app/hero/hero.module.ts (class)')(format='.')
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+makeExample('ngmodule/ts/app/hero/hero.module.3.ts', 'class', 'app/hero/hero.module.ts (class)')(format='.')
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`CrisisModule`和本模块非常像,我们不再赘述。
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`CrisisModule`和本模块非常像,我们不再赘述。
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<live-example embedded plnkr="pre-shared.3" img="devguide/ngmodule/v3-plunker.png">Try the live example.</live-example>
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<live-example embedded plnkr="pre-shared.3" img="devguide/ngmodule/v3-plunker.png">试试在线例子。</live-example>
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<live-example embedded plnkr="pre-shared.3" img="devguide/ngmodule/v3-plunker.png">试试在线例子。</live-example>
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a#shared-module
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a#shared-module
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One thing we don't like is carrying three different versions of the `HighlightDirective`.
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One thing we don't like is carrying three different versions of the `HighlightDirective`.
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And there's a bunch of other stuff cluttering the app folder level that could be tucked away.
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And there's a bunch of other stuff cluttering the app folder level that could be tucked away.
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本应用继续改进。
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本应用在继续演进中。
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让我们感到不爽的是:这里有`HighlightDirective`的三个不同版本。
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让我们感到不爽的是:这里有`HighlightDirective`的三个不同版本。
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还有一大堆其它乱七八糟的东西堆在app目录这一级,我们得把它们清出去。
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还有一大堆其它乱七八糟的东西堆在app目录这一级,我们得把它们清出去。
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Let's add a `SharedModule` to hold the common components, directives, and pipes
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Let's add a `SharedModule` to hold the common components, directives, and pipes
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and share them with the modules that need them.
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and share them with the modules that need them.
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我们添加一个`SharedModule`来存放这些公共组件、指令和管道,并且共享给那些想用它们的模块。
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我们添加`SharedModule`来存放这些公共组件、指令和管道,并且共享给那些想用它们的模块。
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* create an `app/shared` folder
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* create an `app/shared` folder
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* 创建一个`app/shared`目录
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* 创建`app/shared`目录
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* move the `AwesomePipe` and `HighlightDirective` from `app/contact` to `app/shared`.
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* move the `AwesomePipe` and `HighlightDirective` from `app/contact` to `app/shared`.
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* 把`AwesomePipe`和`HighlightDirective`从`app/contact`移到`app/shared`中。
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* 把`AwesomePipe`和`HighlightDirective`从`app/contact`移到`app/shared`中。
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* delete the `HighlightDirective` classes from `app/` and `app/hero`
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* delete the `HighlightDirective` classes from `app/` and `app/hero`
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* 从`app/`和`app/hero`目录中删除`HighlightDirective`类
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* 从`app/`和`app/hero`目录中删除`HighlightDirective`类
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* create a `SharedModule` class to own the shared material
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* create a `SharedModule` class to own the shared material
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* 创建一个`SharedModule`类来管理这些共享的素材
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* 创建`SharedModule`类来管理这些共享的素材
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* update other feature modules to import `SharedModule`
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* update other feature modules to import `SharedModule`
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* 更新启动特性模块,让它们导入`SharedModule`
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* 更新启动特性模块,让它们导入`SharedModule`
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As it happens, the components declared by `SharedModule` itself don't bind with `[(ngModel)]`.
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As it happens, the components declared by `SharedModule` itself don't bind with `[(ngModel)]`.
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Technically, there is no need for `SharedModule` to import `FormsModule`.
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Technically, there is no need for `SharedModule` to import `FormsModule`.
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如果`SharedModule`本身所声明的组件没绑定过`[(ngModel)]`,那么,从技术角度看`SharedModule`并不需要导入`FormsModule`。
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实际上,`SharedModule`本身所声明的组件没绑定过`[(ngModel)]`,那么,从技术角度看`SharedModule`并不需要导入`FormsModule`。
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`SharedModule` can still export `FormsModule` without listing it among its `imports`.
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`SharedModule` can still export `FormsModule` without listing it among its `imports`.
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`UserService`是一个全应用级单例。
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`UserService`是一个全应用级单例。
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我们不希望每个模块都各自有它的一个实例。
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我们不希望每个模块都各自有它的一个实例。
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而如果由`SharedModule`提供`UserService`,就会导致[一个真正的危险](../cookbook/ngmodule-faq.html#q-why-it-is-bad)。
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而如果由`SharedModule`提供`UserService`,就会导致[一个铁板钉钉的危险](../cookbook/ngmodule-faq.html#q-why-it-is-bad)。
|
||||||
|
|
||||||
.alert.is-critical
|
.alert.is-critical
|
||||||
:marked
|
:marked
|
||||||
|
@ -1573,7 +1571,7 @@ a#core-module
|
||||||
* create an `app/core` folder
|
* create an `app/core` folder
|
||||||
* 创建`app/core`文件夹
|
* 创建`app/core`文件夹
|
||||||
* move the `UserService` and `TitleComponent` from `app/` to `app/core`
|
* move the `UserService` and `TitleComponent` from `app/` to `app/core`
|
||||||
* 把`UserService`和`TitleComponent`从`app`移到`app`中
|
* 把`UserService`和`TitleComponent`从`app`移到`app/core`中
|
||||||
* create a `CoreModule` class to own the core material
|
* create a `CoreModule` class to own the core material
|
||||||
* 创建一个`CoreModule`类来管理这些核心素材
|
* 创建一个`CoreModule`类来管理这些核心素材
|
||||||
* update the `AppRoot` module to import `CoreModule`
|
* update the `AppRoot` module to import `CoreModule`
|
||||||
|
@ -1581,7 +1579,7 @@ a#core-module
|
||||||
|
|
||||||
Again, most of this is familiar blocking and tackling. The interesting part is the `CoreModule`
|
Again, most of this is familiar blocking and tackling. The interesting part is the `CoreModule`
|
||||||
|
|
||||||
又只剩下一些熟悉的普通任务了,但这次是针对`CoreModule`的:
|
这些都是一些熟悉的普通任务。最有趣的是`CoreModule`:
|
||||||
|
|
||||||
+makeExample('ngmodule/ts/app/core/core.module.ts', 'v4', 'app/app/core/core.module.ts')
|
+makeExample('ngmodule/ts/app/core/core.module.ts', 'v4', 'app/app/core/core.module.ts')
|
||||||
|
|
||||||
|
@ -1590,7 +1588,7 @@ a#core-module
|
||||||
We're importing some extra symbols from the Angular core library that we're not using yet.
|
We're importing some extra symbols from the Angular core library that we're not using yet.
|
||||||
They'll become relevant later in this page.
|
They'll become relevant later in this page.
|
||||||
|
|
||||||
我们正在从Angular核心库中导入一些从未用过的符号,稍后我们会接触它们。
|
我们正在从Angular核心库中导入一些从未用到的符号,稍后我们会接触它们。
|
||||||
|
|
||||||
:marked
|
:marked
|
||||||
The `@NgModule` metadata should be familiar.
|
The `@NgModule` metadata should be familiar.
|
||||||
|
@ -1598,7 +1596,7 @@ a#core-module
|
||||||
because `AppComponent` (which is in `AppModule`) displays the title in its template.
|
because `AppComponent` (which is in `AppModule`) displays the title in its template.
|
||||||
`TitleComponent` needs the Angular `NgIf` directive that we import from `CommonModule`.
|
`TitleComponent` needs the Angular `NgIf` directive that we import from `CommonModule`.
|
||||||
|
|
||||||
我们对`@NgModule`的元数据应该很熟悉了吧。
|
我们对`@NgModule`的元数据应该很熟悉。
|
||||||
由于该模块*拥有*`TitleComponent`,所以我们声明了它。由于`AppComponent`(位于`AppModule`模块)在模板中显示了这个标题,所以我们导出了它。
|
由于该模块*拥有*`TitleComponent`,所以我们声明了它。由于`AppComponent`(位于`AppModule`模块)在模板中显示了这个标题,所以我们导出了它。
|
||||||
由于`TitleComponent`需要用到Angular的`NgIf`指令,所以我们导入了`CommonModule`。
|
由于`TitleComponent`需要用到Angular的`NgIf`指令,所以我们导入了`CommonModule`。
|
||||||
|
|
||||||
|
@ -1632,7 +1630,7 @@ a#core-module
|
||||||
Yet they're too big and messy to leave loose in the root folder.
|
Yet they're too big and messy to leave loose in the root folder.
|
||||||
|
|
||||||
但真实的应用要考虑很多。
|
但真实的应用要考虑很多。
|
||||||
它们有很多一次性的组件(比如:加载动画、消息浮层和模态对话框等),而且只用于`AppComponent`的模板中。
|
它们有只用于`AppComponent`的模板中的一些一次性的组件(比如:加载动画、消息浮层和模态对话框等)。
|
||||||
我们不用在其它地方导入它们,因此没必要*共享*它们。
|
我们不用在其它地方导入它们,因此没必要*共享*它们。
|
||||||
然而如果把它们留在根目录,还是显得太大、太乱了。
|
然而如果把它们留在根目录,还是显得太大、太乱了。
|
||||||
|
|
||||||
|
@ -1648,7 +1646,7 @@ a#core-module
|
||||||
Their _providers_ are not shared.
|
Their _providers_ are not shared.
|
||||||
|
|
||||||
当很多组件在它们的构造函数中注入这些服务时(因此也需要用JavaScript的`import`语句来导入它们的符号),任何组件或模块自身都不应该定义或重新创建这些服务。
|
当很多组件在它们的构造函数中注入这些服务时(因此也需要用JavaScript的`import`语句来导入它们的符号),任何组件或模块自身都不应该定义或重新创建这些服务。
|
||||||
它们的*提供商*不是共享的。
|
因为它们的*提供商*不是共享的。
|
||||||
|
|
||||||
We recommend collecting such single-use classes and hiding their gory details inside a `CoreModule`.
|
We recommend collecting such single-use classes and hiding their gory details inside a `CoreModule`.
|
||||||
A simplified root `AppModule` imports `CoreModule` in its capacity as orchestrator of the application as a whole.
|
A simplified root `AppModule` imports `CoreModule` in its capacity as orchestrator of the application as a whole.
|
||||||
|
|
Loading…
Reference in New Issue