Code QuizAdvanced

Uppercase for HTTP methods

Choosing the right intrinsic string type to fully uppercase a literal.

Codetypescript
type Method = "get" | "post" | "delete";

// Goal: "GET" | "POST" | "DELETE"
type ScreamingMethod = Capitalize<Method>;

const m: ScreamingMethod = "GET"; // error!

What is the bug in this code?