// Stefan Judis · 3 April 2026

The scope of type guards and assertion functions (#tilPost)

I've just read Absorbing unknown Into the Type Realm. It's a good read, check it out. However I also learned an important difference between TypeScript type guards and assertion functions. And to be fair, I didn't even know assertion functions were a thing in TypeScript. Let's look at a standard typ...

Stefan Judis

@stefan-judis

www.stefanjudis.com

Stefan Judis@stefan-judis