Defensive Programming in JavaScript – Write Safer, Smarter Code

Episode 21: Defensive Programming 🎉🛡️✍️🤔

The JavaScript Tool I'm using to demonstrate:
https://runjs.app/ColorCode

ColorCode Etsy Merchandise store:
https://www.etsy.com/shop/ColorCodeStore

0:00 Intro
1:50 Theory (Imperative vs. Declarative)
3:20 1. Fail Fast
5:17 2. Check for Type
6:45 What about TypeScript?
8:19 3. Sanitize & Validate
9:57 4. Use Defaults
11:50 5.Guard Against Structure Change
13:35 6. Avoid Side Effects
15:55 7. Lock Down Your Precious
18:20 8. Use Timeouts
23:15 9. Wrap Dangerous Code
26:28 10. Enumerate The Expected
29:06 Summary and Outro

Stop your JavaScript code from blowing up. In this video, we dive into defensive programming—a set of practical techniques that help you write safer, more reliable code that doesn’t fail when the unexpected happens.

You’ll learn how to:
Guard against invalid inputs
Avoid runtime errors before they happen
Write functions that fail gracefully
Use type checks, defaults, and sanity checks like a pro
Whether you're building frontend apps or backend services, defensive programming is a must-have skill for any serious JavaScript developer.

🔧 Examples included
✅ Clean code principles
🔥 Real-world JavaScript tips

Видео Defensive Programming in JavaScript – Write Safer, Smarter Code канала ColorCode