Implementing DRY Principle in Authentication ♻️ Reusable Function in Express.js & MySQL

Implementing DRY Principle in Authentication ♻️ Reusable Function in Express.js & MySQL

T
Thapa Technical
1 Video View·Mar 16, 2025

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In this video, we’ll improve our authentication logic by applying the DRY (Don't Repeat Yourself) principle. Instead of writing repetitive authentication code, we’ll create a reusable function, pass arguments, and define it in a separate file. This will help us keep the code clean, efficient, and maintainable.

📌 What You Will Learn:
✔️ What is the DRY Principle and why it matters
✔️ How to refactor authentication logic using reusable functions
✔️ Passing arguments to a function and using them dynamically
✔️ Testing our optimized authentication system in Express.js
✔️ Writing clean and maintainable code
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⌛TIMELINE⏳
🧐 0:00 - What is the DRY Principle?
🔧 0:35 - How to Improve Our Code Using DRY Principle
📌 1:40 - Passing Arguments in Our Function
💡 2:45 - Getting Them as Parameters and Using Them
🧪 3:50 - Checking If Our App Works Properly
💬 4:55 - Comment Your Views on the Code