TypeScript 6.0 has been out for a few months now, and it's a bit of an unusual release. It's the last compiler that will be written in TypeScript and JavaScript. Later this year, TypeScript 7 arrives with the compiler rewritten in Go. Microsoft has seen roughly 10x speed improvements on large codebases. That makes 6.0 the bridge release.
The good news is that the features I want to show you aren't going anywhere. Everything here is forward compatible with TypeScript 7. They're also just genuinely nice to use. I'll walk through five additions worth adopting today, show the tsconfig.json changes that add them, and finish with what the Go rewrite means for you.
If you'd rather watch than read, the full video is here.
Prerequisites
Node.js 20 or newer
