I'm not making a case for or against TypeScript; I'm just concerned that people be aware what is and is not part of JavaScript. You said that TypeScript had no

I'm not making a case for or against TypeScript; I'm just concerned that people be aware what is and is not part of JavaScript. You said that TypeScript had no additional features except types. That's all I'm responding to: I'm pointing out this isn't the case. Class fields are, currently, not part of JavaScript. Neither are decorators. (We're working on it - but actually a concern which has come up is that we might end up with something which breaks TypeScript, because the proposals are still in the early stages and therefore subject to radical changes.)