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我正在使用 Dart 0.8.10_r30104 (DEV) 并发现它无法生成 Javascript（尽管应用程序本身可以在 Dartium 中运行）。

当我在 builder.dart 上选择“生成 Javascript”时提示错误：

--- Nov 12, 2013 7:35:43 AM Running dart2js... ---
F:\dart\dart-sdk\bin\dart2js.bat --out=E:\My Books\Sitepoint\Sample\build.dart.js E:\My Books\Sitepoint\Sample\build.dart
/E:/My Books/Sitepoint/Sample/packages/polymer/builder.dart:83:8: Error: Library not found 'dart:io'.
import 'dart:io';
   ^^^^^^^^^
/E:/My Books/Sitepoint/Sample/packages/polymer/src/build/linter.dart:11:8: Error: Library not found 'dart:io'.
import 'dart:io';
   ^^^^^^^^^
/E:/My Books/Sitepoint/Sample/packages/barback/src/asset.dart:9:8: Error: Library not    found 'dart:io'.
import 'dart:io';
   ^^^^^^^^^
...
/E:/My Books/Sitepoint/Sample/packages/analyzer/src/generated/element.dart:7220:17: Hint: The class 'VoidTypeImpl' overrides 'operator==', but not 'get hashCode'.
   bool operator ==(Object object) => identical(object, this);
            ^^
/E:/My Books/Sitepoint/Sample/packages/analyzer/src/generated/element.dart:4874:17:     Hint: The class 'PropertyAccessorElementImpl' overrides 'operator==', but not 'get hashCode'.
  bool operator ==(Object object) => super == object && identical(isGetter, ((object as PropertyAccessorElement)).isGetter);
            ^^
Error: Compilation failed.

===

什么地方出了错？

4

1 回答 1

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要为聚合物应用程序生成 JS，您需要在应用程序的顶层运行“pub build”。这将创建一个名为 build 的顶级目录，其中将包含您的 JS（以及指向 JS 的 html）。

于 2013-11-12T14:02:05.923 回答