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Introduction

Welcome to the Cog tutorial.
Cog is an ultra lightweight (23.5 kB unpacked) HTTP framework built directly on top of Node.js’s native http module. It aims to provide a minimal, yet powerful foundation for building backend servers and APIs — without any runtime dependencies.

If you’ve used frameworks like Express, you’ll feel right at home with Cog’s API.

What you’ll learn​

In this tutorial, you will learn how to:

  • Create a simple HTTP server
  • Define routes and handle requests
  • Work with query strings and request bodies
  • Use middleware for reusable logic

Requirements​

To follow this tutorial, you should have:

  • Basic knowledge of JavaScript or TypeScript
  • Node.js v18.15.0 or higher installed