Building a Weather API CLI with TypeScript — async/await, fetch, and Response Types

Introduction

This is my sixth article as a Java engineer learning TypeScript from scratch.

In my previous article, I built a Quiz CLI and learned about enum, tuple types, and mocking an entire module with jest.mock(). This time, I built a Weather API CLI and focused on:

Calling an external API asynchronously with async/await and fetch

Describing an API response with type definitions (type to model the JSON shape)