Regarding "every modern browser": https://code.google.com/p/dart/issues/detail?id=13285 https://code.google.com/p/dart/issues/detail?id=13285 This bug has bitt

Regarding "every modern browser": https://code.google.com/p/dart/issues/detail?id=13285 https://code.google.com/p/dart/issues/detail?id=13285 This bug has bitten users of modern browsers more than once. They were probably too modern and Dart uses the Blink codebase for its interface to JavaScript. So in reality even dart2js can only safely be used together with Google Chrome.