如何在Dart中监听自定义事件？ [英] How do I listen for custom events in Dart?

问题描述

我想做像

// WARNING: this code does not work, it's illustrative
query("#myBtn").onClick.listen((e) {
  window.fire["foo"];
});

window.on["foo"].listen((e) => print("foo was here"));

window.on["foo"].listen((e) => print("and here"));

有可能吗？怎么样？我现在在Google上搜索了几个小时，但我对一般的编程很陌生，所以我真的不知道这样的关键字。

Is it possible? How? I've been searching on Google for a few hours now, but I'm kind of new to programming in general, so I don't really know any keywords for this sort of thing.

谢谢！ ：）

- 编辑：解决 -

-- Solved --

这里是如何传递参数，但它工作）

Here's how to pass arguments along (The editor will complain, but it works)

List<String> myData = ["one","two"];

query("#myBtn").onClick.listen((e) {
  window.on["foo"].dispatch(new CustomEvent("foo", canBubble: false, cancelable: false, detail: myData));
});

window.on["foo"].add((e) => print( e.detail[1] ));

： - ）

推荐答案

这应该可以工作：

window.on['foo'].listen((e) => print("foo was here"));

查看文档：

• http://api.dartlang.org/docs/ releases / latest / dart_html / Events.html

• http://api.dartlang.org/docs/releases/latest/dart_html/Events.html

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