review di.
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@ -159,7 +159,7 @@ block ctor-syntax
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We also leveraged TypeScript's constructor syntax for declaring
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parameters and properties simultaneously.
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再次借助TypeScript的构造器语法来同时定义参数和属性。
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再次借助 TypeScript 的构造器语法来同时定义参数和属性。
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:marked
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Now we create a car by passing the engine and tires to the constructor.
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@ -205,7 +205,7 @@ block ctor-syntax
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during each test:
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`Car`类非常容易测试,因为现在我们对它的依赖有了完全的控制权。
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在每个测试期间,我们可以往构造函数中传入mock对象,做想让它们做的事:
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在每个测试期间,我们可以往构造函数中传入 mock 对象,做想让它们做的事:
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- var stylePattern = { otl: /(new Car.*$)/gm };
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+makeExample('dependency-injection/ts/app/car/car-creations.ts', 'car-ctor-instantiation-with-mocks', '', stylePattern)(format=".")
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@ -415,7 +415,7 @@ block ctor-syntax
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that create the services our application requires.
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We'll explain what [providers](#providers) are later in this chapter.
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我们必须通过注册**提供商 (provider)**来配置注入器,这些提供商为应用创建所需服务。
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我们必须通过注册**提供商 (provider)** 来配置注入器,这些提供商为应用创建所需服务。
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在本章的稍后部分会解释什么是[提供商](#providers)。
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We can either register a provider within an [NgModule](ngmodule.html) or in application components
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@ -519,7 +519,7 @@ block ctor-syntax
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Angular injector to inject an instance of
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`HeroService` whenever it creates a new `HeroListComponent`.
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构造函数参数类型、`@Component`装饰器和父级的`providers`信息合起来告诉Angular的注入器,
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构造函数参数类型、`@Component`装饰器和父级的`providers`信息合起来告诉 Angular 的注入器,
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任何新建`HeroListComponent`的时候,注入一个`HeroService`的实例。
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#di-metadata
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@ -626,7 +626,7 @@ block ctor-syntax
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//- FIXME refer to Dart API when that page becomes available.
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- var injUrl = '../api/core/index/Injectable-decorator.html';
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h3#injectable Why @Injectable()?
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h3#injectable 为什么要用@Injectable()?
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h3#injectable 为什么要用 @Injectable()?
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:marked
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**<a href="#{injUrl}">@Injectable()</a>** marks a class as available to an
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injector for instantiation. Generally speaking, an injector will report an
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@ -661,7 +661,7 @@ block injectable-not-always-needed-in-ts
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ul(style="font-size:inherit")
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li
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p <b>Future proofing:</b> No need to remember <code>@Injectable()</code> when we add a dependency later.
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p <b>面向未来:</b> 没有必要记得在后来添加依赖的时候添加<code>@Injectable()</code>。
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p <b>面向未来:</b> 没有必要记得在后来添加依赖的时候添加 <code>@Injectable()</code>。
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li
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p <b>Consistency:</b> All services follow the same rules, and we don't have to wonder why #{_a} #{_decorator} is missing.
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p <b>一致性:</b>所有的服务都遵循同样的规则,不需要考虑为什么某个地方少了一个。
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@ -681,7 +681,8 @@ block injectable-not-always-needed-in-ts
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identify a class as a target for instantiation by an injector.
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我们**可以**添加它。但是没有必要,因为`HerosComponent`已经有`@Component`装饰器了,
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`@Component`(和随后将会学到的`@Directive`和`@Pipe`一样)是 <a href="#{injUrl}">Injectable</a> 的子类型。实际上,正是这些`Injectable`装饰器是把一个类标识为注入器实例化的目标。
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`@Component`(和随后将会学到的`@Directive`和`@Pipe`一样)是 <a href="#{injUrl}">Injectable</a> 的子类型。
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实际上,正是这些`Injectable`装饰器是把一个类标识为注入器实例化的目标。
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+ifDocsFor('ts')
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.l-sub-section
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