25 Things JavaScript Developers Should Know, but Probably Don't - 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