You wake up in a dark room.
You don’t remember how you got there.
You are not alone.
Around you are many other people, all regaining consciousness at the same time.

Suddenly, a screen flickers to life. Someone screams.
A grainy figure appears.

“Welcome. I'm sure you are wondering where you are. While your location is not important, what I offer for you is: salvation. You spend your time building applications, but do you really appreciate your tools? For your sake, I hope so...”

You look around you.
The dirty walls are covered with code.
“|”. “&”. “infer”. “extends”.

Advanced TypeScript…
Union Types. Conditional Types. Mapped Types. Template Literal Types.

“Around you is everything you need to save each other, and yourselves. But I’m a reasonable person. I've sent you a teacher. You have twenty minutes. Let’s play a game.”

First given at ng-conf 2022. Introduction to more complex parts of the TypeScript type system. Talk includes an interactive escape room for the audience to play along! Ideally 30 minutes.