Overview

Day 73 focuses on advanced Express routing concepts. Today's goal: understand route parameters, query parameters, and build a small CRUD‑style API without using a database. Focused on how to extract dynamic values from the URL and how to manage in‑memory data.

What I Learned Today

• How to use route parameters (req.params)
• How to use query parameters (req.query)
• Creating a mini CRUD API using an array
• Difference between params, query, and body
• Structuring routes in a clean way

Key Concepts

Route Parameters

• Used for dynamic routes
• Example: /users/123
• Access with req.params.id

Query Parameters

• Used for filtering/search
• Example: /search?name=john
• Access with req.query.name

Request Body