TypeScript Overview

What this topic covers

TypeScript study is strongest when you connect types to safer refactors, better editor feedback, and clearer APIs.

Revision checkpoints

• Review unions, narrowing, and generics often.
• Model domain rules with types rather than comments.
• Keep runtime validation in mind when data crosses boundaries.

type Topic = "frontend" | "backend" | "sre";
const current: Topic = "frontend";