[novaleaf]

Typescript is ECMAScript6, with additional (typing) features.

I'd venture it's ecmascript 6 being used, as Google suffers NIH syndrome too..

[jarek-foksa]

I wouldn't call TypeScript an "ECMAScript 6 with types". It feels more like a superset of ECMAScript 5 as it introduces non-standard features such as static class properties and public/private scoping while major ES6 features such as proxies, symbols, generators, modules or block scoping are not supported.

[omarelamri]

Yeah, it definitely is EcmaScript 6. They've added the "class" and "constructor" keywords. Typescript is very mush modeled after EcmaScript 6 anyways, so technically it can be both. But I'm sure it's EcmaScript6, because that's what Angular 2 is written in.

[joshkpeterson]

See the post about Google's AtScript that was on HN yesterday.

[omarelamri]

So is this basically TypeScript with annotations and types available at runtime?