The Challenges of TypeScript and JavaScript

The primary version of sass today is actually a self bundled Dart application. So it ships with the Dart jet. Because of the type hinting and stuff, the Dart jet is faster than a JavaScript jet because the type hintings built all the way through the jet rather than just disregarded at the higher level. It wouldn't be impossible in the future if for JavaScript to have some kind of like types mode,. maybe you'd have like use types or something.