[tkubacki]

>Typescript is a layer on top of Javascript and existing Javascript libraries

With all horrible issues JS has: unpredictable perf, library hell.

Also my issues with TS are:

1) what if future ECMA will bring incompatible changes with current TS ? TS will break compatibility or we will have another EEE from MS ? Dart clean break seems like a safer approach.

2) there is no cross-platform IDE for TS (yea I know plugins - but Dart has stock cross-platform IDE)

3) TS perf will be always as good as JS

[nailer]

What's library hell in JavaScript? I've never heard anyone use that term ever.

Any links for the perf issues you mentioned? There's some massive JS apps at Walmart and PayPal.

[tkubacki]

I mean there are many incompatible libs, module and import methods in JS