Is TypeScript a superset of ES6?

Question

In other words, is all ES6 syntax covered by TypeScript?

How is my question differente from:

• "Is TypeScript really a superset of JavaScript?"
  ES6 isn't (or hasn't been considered if you read this in the futur) the current version of Javascript
• Is Typescript != ES6?
  It's different, I know that, not what I'm asking.

Answer 1

Based on the current language specification available at the website:

TypeScript is a syntactic sugar for JavaScript. TypeScript syntax is a superset of Ecmascript 5 (ES5) syntax.

And:

TypeScript syntax includes several proposed features of Ecmascript 6 (ES6), including classes and modules.

Answer 2

TypeScript 1.5 (February 2015) was the last version not to claim to be a superset of ES6:

TypeScript syntax is a superset of Ecmascript 5 (ES5) syntax.

As of TypeScript 1.6 (August 2015):

TypeScript syntax is a superset of ECMAScript 6 (ES6) syntax.

The wording was changed in TypeScript 1.8 (January 2016), but the meaning is the same:

TypeScript syntax is a superset of ECMAScript 2015 (ES2015) syntax.

So, yes: According to the spec, TypeScript is a superset of ES6.