angulardart组件 - 调度自定义事件 [英] angulardart components - dispatch custom event

问题描述

我想从我的角镖组件发送一个自定义事件给他的父母。我可以用Angular Dart吗？

I want to dispatch a custom event from my Angular Dart component to his parent. How can I do this with Angular Dart?

换句话说，我想做一些类似这样的事情：如何在聚合物中调度和收听自定义事件？

In other words I want do something similar to this: How do you dispatch and listen for custom events in Polymer?

推荐答案

也许 emit 做你想要的，但我认为这只适用于Angular。
如果要发送DOM事件，可以使用 dispatchEvent 方法，如

Maybe emit does what you want but I assume this works only within Angular. If you want to send DOM events you can do it with dispatchEvent method like

Element e; // assigned by the injector through a constructor argument or aquired by querySelector, ...
...
var event = new CustomEvent(
  type, /* 'myeventname'
  canBubble: canBubble != null ? canBubble : true,
  cancelable: cancelable != null ? cancelable : true,
  detail: {'somekey', 'someValue'}
);
e.dispatchEvent(event);

您可以通过

e.on['myeventname'].listen((e) => print(e.details['somekey']));

或聚合物（因为我看到你试图让Angular与聚合物一起工作）

or in Polymer (because I saw that you tried to make Angular work together with Polymer)

<some-element on-myeventname="{{myEventHandler}}"></some-element>

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