Summary
This chapter introduces TypeScript as a typed superset of JavaScript to define data shapes and enforce a more structured codebase before moving on to frameworks like Nest.js.

General domain of usage
Backend development


At this point, you can build a real backend application.

You can create routes, handle requests, and store data in a database. Your server can process input, return responses, and work with real data using MongoDB.


As you move forward, the next tool you'll learn is TypeScript.

TypeScript is a typed version of JavaScript that helps you define the shape of your data and write more structured code. While it's not required to build backend applications with Node.js or Express, it becomes essential when working with Nest.js.

Nest.js, which you will learn next, is built with TypeScript and uses it as a core part of its architecture.

That's why before moving to Nest.js, it's important to get comfortable with TypeScript basics.

In the next block, you will learn how TypeScript works and how to use it in a practical way for backend development.


Learn how to store and manage data in backend applications using MongoDB and Mongoose. Connect your Express API to a database and perform create, read, update, and delete operations. Build real data-driven backend functionality and move beyond in-memory storage.

Final Words