blocks|key|759790|text|您将无法直接从dart代码中调用javascript。本机指令是为dartc的核心库(dart:core、dart:dom、dart:html、dart:json等)保留的，这些核心库本身会编译成javascript。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|759791|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

You will not be able to call javascript directly from dart code. The native directive is reserved for the core libraries of dartc (dart:core, dart:dom, dart:html, dart:json, etc), which itself compiles to javascript.

blocks|key|759850|text|现在答案是肯定的！Dart现在发布了一个JS-interop库，以便在Dart应用程序中使用现有的JavaScript代码。点击此处了解更多信息：https://www.dartlang.org/articles/js-dart-interop/|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|759851|entityMap|0|LINK|mutability|MUTABLE|url|https://www.dartlang.org/articles/js-dart-interop/^0|21|1E|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

The answer is now Yes! Dart now ships a JS-interop library to use existing JavaScript code with your Dart app. Learn more here: <a href="https://www.dartlang.org/articles/js-dart-interop/" rel="noreferrer">https://www.dartlang.org/articles/js-dart-interop/</a>

blocks|key|759883|text|还有一个dart:js库。这里是解释如何使用这个库与JavaScript进行互操作的an+article。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|759884|entityMap|0|LINK|mutability|MUTABLE|url|https://www.dartlang.org/articles/js-dart-interop/^0|4|7|16|A|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@$9|O|A|P|B|C]]|D|@$9|Q|A|R|1|S]]|E|$]]|$1|F|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|G|$H|$5|I|J|K|E|$L|M]]]]

There is also a <code>dart:js</code> library. And here is <a href="https://www.dartlang.org/articles/js-dart-interop/" rel="nofollow">an article</a> explaining how to use this library for interoperating with JavaScript.

blocks|key|759943|text|现在有了一种新的更简单的方式https://pub.dartlang.org/packages/js+(当前版本为0.6.0-beta.6)|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|759944|使JS类和函数可用于Dart，如：|759945|@JS("JSON.stringify")
external+String+stringify(obj);|code-block|syntax|javascript|759946|@JS('google.maps')
library+maps;

//+Invokes+the+JavaScript+getter+`google.maps.map`.
external+Map+get+map;

//+`new+Map`+invokes+JavaScript+`new+google.maps.Map(location)`
@JS()
class+Map+{
++external+Map(Location+location);
++external+Location+getLocation();
}

//+`new+Location(...)`+invokes+JavaScript+`new+google.maps.LatLng(...)`
//
//+We+recommend+against+using+custom+JavaScript+names+whenever
//+possible.+It+is+easier+for+users+if+the+JavaScript+names+and+Dart+names
//+are+consistent.
@JS("LatLng")
class+Location+{
++external+Location(num+lat,+num+lng);
}|759947|有关更多信息，请参阅软件包的自述文件|759948|entityMap|0|LINK|mutability|MUTABLE|url|https://pub.dartlang.org/packages/js^0|E|10|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]]|C|$]]|$1|D|3|E|5|6|7|10|8|@]|9|@]|C|$]]|$1|F|3|G|5|H|7|11|8|@]|9|@]|C|$I|J]]|$1|K|3|L|5|H|7|12|8|@]|9|@]|C|$I|J]]|$1|M|3|N|5|6|7|13|8|@]|9|@]|C|$]]|$1|O|3|-4|5|6|7|14|8|@]|9|@]|C|$]]]|P|$Q|$5|R|S|T|C|$U|V]]]]

There is now a new simpler way <a href="https://pub.dartlang.org/packages/js" rel="noreferrer">https://pub.dartlang.org/packages/js</a> (currently version 0.6.0-beta.6)

Make JS classes and functions available to Dart like:

<pre><code>@JS("JSON.stringify")
external String stringify(obj);
</code></pre>



<pre><code>@JS('google.maps')
library maps;

// Invokes the JavaScript getter `google.maps.map`.
external Map get map;

// `new Map` invokes JavaScript `new google.maps.Map(location)`
@JS()
class Map {
 external Map(Location location);
 external Location getLocation();
}

// `new Location(...)` invokes JavaScript `new google.maps.LatLng(...)`
//
// We recommend against using custom JavaScript names whenever
// possible. It is easier for users if the JavaScript names and Dart names
// are consistent.
@JS("LatLng")
class Location {
 external Location(num lat, num lng);
}
</code></pre>

for more see the readme of the package

I understand Dart compiles to JavaScript, and I read the <a href="http://www.dartlang.org/docs/spec/dartLangSpec.pdf" rel="noreferrer">Dart Language Spec</a> on Libraries, although I didn't see an answer there. Also a search on their <a href="https://groups.google.com/a/dartlang.org/group/misc/search?group=misc%C3%A5&amp;q=existing&amp;qt_g=Search%20this%20group" rel="noreferrer">discussion form</a> for the word 'existing' turns up 3 results that are not related.

Does anyone know if Dart will support the use of existing JavaScript libraries such as jQuery or Raphael?

Will Dart support the use of existing JavaScript libraries?

jQuery

JSON

我知道Dart编译为JavaScript，并且我阅读了库上的，尽管我在那里看不到答案。同样，在他们的上搜索“existing”一词，会出现3个不相关的结果。有没有人知道Dart是否会支持使用现有的JavaScript库，如jQuery或拉斐尔？

问Dart是否支持使用现有的JavaScript库？
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