Decorators (Basics)

Summary

An experimental TypeScript feature that lets you annotate classes and methods with metadata (`@Controller`, `@Get`) — the syntax that frameworks like NestJS build their entire API around.

• 1Read a few `@Decorator` examples from a NestJS controller and guess what each does.
• 2Understand decorators are mostly a framework-level feature — you'll consume them more than write your own early on.
• 3Enable the `experimentalDecorators` tsconfig option to try one yourself.