Well, CoffeeScript and TypeScript are different in that they simply compile into Javascript, but Google initially intended dart to be available directly within

Well, CoffeeScript and TypeScript are different in that they simply compile into Javascript, but Google initially intended dart to be available directly within web-pages. More on the reversal of that decision here: https://news.ycombinator.com/item?id=9264531 https://news.ycombinator.com/item?id=9264531