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Dartlang isn't directly supported, and I'm not interested in digging through compiled javascript to debug. Yes, there are tools to ameliorate this, but it's not worth the technical debt of a new language with support from only a single vendor.

Polymer is ridiculously slow in my tests.




I'm deving 10K LOC app in Dart/Polymer not a single time had to debug JS directly (dart2js is very high quality IMO).

Yes Polyemer/Dart is still not very fast due to:

a) polyfills

b) not having DartVM in Chrome

but things will get better and if you have project you plan to live more than 12 months and you start now - it's worth a try.




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