cookbook - 1 to 2 初译完毕
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@ -1315,7 +1315,7 @@ block style-property-name-dart-diff
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The directive calls `EventEmitter.emit(payload)` to fire an event, passing in a message payload that can be anything.
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Parent directives listen for the event by binding to this property and accessing the payload through the `$event` object.
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指令使用典型的Angular[EventEmitter](../api/core/EventEmitter-class.html)来触发自定义事件。
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指令使用典型的Angular [EventEmitter](../api/core/EventEmitter-class.html)来触发自定义事件。
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指令创建一个`EventEmitter`实例,并且把它作为一个属性暴露出来。
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指令调用`EventEmitter.emit(payload)`来触发事件,传进去的消息载荷可以是任何东西。
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父指令通过绑定到这个属性来监听这个事件,并且通过`$event`对象来访问这个载荷。
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@ -1973,7 +1973,7 @@ block remember-the-brackets
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That syntax assigns the *string* value "currentHero" to `ngIf`.
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In JavaScript a non-empty string is a truthy value, so `ngIf` would always be
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`true` and Angular would always display the `hero-detail`
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… even when there is no `currentHero`!
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... even when there is no `currentHero`!
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不要误写为`ngIf="currentHero"`!
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这种语法会把一个字符串"currentHero"赋值给`ngIf`。
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