A Learning TypeScript > Declaration Files 🍲 entree project.
Salutations! Come one, come all - to the amazing Type Illusionist!
It's no trick, no common shenanigan. These illusions will amaze and astound.
Watch as I make the entire
./show.ts file... disappear!
✨ Poof! ✨
But wait, there's more!
I will also disappear all the type annotations in
Now, our audience volunteer -that's you!- will have to add those type annotations back to prove the magic did not harm the code's runtime behavior.
If you haven't yet, set up the github.com/LearningTypeScript/projects repository locally.
git clone https://github.com/LearningTypeScript/projects learning-typescript-projects
Change your terminal directory to this project's:
In a terminal, start the TypeScript compiler in watch mode:
index.ts: Add back type imports from
"./show"and corresponding type annotations
show.d.ts: Declare types for the missing show module here based on the remaining code in
show.solution.ts: Solution code
- Don't use
anyor leave any implicit
- Don't change any runtime code behavior. You're just working in the type system.