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As if TypeScript ever got anywhere?

Dart already has some small traction and it's not even 1.0 yet -- they just froze the core library APIs.

So, not only they are "still working on it", they have not even released it properly yet.

Not to mention it has totally different goals related to TypeScript (TS = tooling, Dart = performance, language design).

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I would say that one of Dart's goals is certainly toolability. We ship a Dart Editor, and an analyzer, that supports refactoring, code completion, jump to definition, and more.

[disclaimer: I work on the Dart team.]

As I see it, TypeScript brings static typing and better tooling to the existing Javascript stack; Dart is a green field effort to reinvent the stack with some static typing and better tooling, among other things (new APIs, a faster VM, etc...).

[disclaimer: MS employee and PL designer/enthusiast, but no relationship with TypeScript]

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