将Dart函数公开为javascript [英] Expose Dart functions to javascript

问题描述

我有点to a，试图通过编写一些库函数来弄湿我的脚。

虽然我从dart调用javascript函数没有问题，但我很希望能够从javascript调用dart函数，但到目前为止，我不是非常喜欢。

例如，我喜欢能够从dart中暴露一些基本功能，例如：

  main（）{
 String foo（）{
 return酒吧！; 
} 
 
 js.scoped（（）{
 js.context.foo = foo; 
}）; 
} 
  

，然后可以从javascript调用它们，例如：

 < script& 
 window.onload = function（）{
 alert（foo（）=+ foo（））; 
} 
< / script> 
  

这样的东西有可能吗？

解决方案

没问题！请参阅从JavaScript调用Dart 。 p>

在您的情况下：

  import' dart：js'as js; 
 main（）{
 String foo（）{
 returnbar！ 
} 
 
 js.context ['foo'] = foo; 
} 
  

I'm a bit of a newb to dart, and trying to get my feet wet by writing some library functions in it.

While I've had no problem calling javascript functions from dart, I'd love to be able to call dart functions from javascript, but so far, I'm not having much like.

For example, I'd love to be able to expose some basic functions from dart, for example like so:

main() {
  String foo() {
    return "bar!";
  }

  js.scoped(() {
    js.context.foo = foo;
  });
}

and then be able to call them from javascript, like so:

<script>
  window.onload = function() {
    alert("foo() = " + foo());
  }
</script>

Is something like this even possible?

解决方案

No problem ! see Calling Dart from JavaScript.

In your case :

import 'dart:js' as js;
main() {
  String foo() {
    return "bar!";
  }

  js.context['foo'] = foo;
}

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