typeof in JavaScript 🔍 | How to Check Data Types Correctly (With Examples & Gotchas)

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👋 Welcome to Coding4Dev!
Confused by what typeof null really means? Or why arrays return "object"? In this video, we break down the typeof operator in JavaScript, explain how it works, its weird quirks, and show you the best practices for accurate type checking in real-world applications.

Whether you're a beginner or prepping for interviews, mastering type checking is essential to avoid tricky bugs.

📚 What You’ll Learn:
✅ What the typeof operator is and how to use it
✅ Outputs for strings, numbers, booleans, null, arrays, objects, and functions
✅ Known JavaScript quirks (typeof null, NaN, arrays as objects)
✅ How to distinguish between primitives and reference types
✅ When to use typeof vs instanceof
✅ Real-world best practices for clean and safe type checking

💡 Who is this for?
🧠 Beginners learning the basics of JavaScript
🐞 Developers struggling with odd type bugs
📘 Students preparing for JavaScript interviews
📈 Anyone who writes conditional logic based on data types

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#JavaScriptTypeof #TypeCheckingJS #JavaScriptQuirks #LearnJavaScript #Coding4Dev #JSDataTypes #typeofNull #typeofOperator #JavaScriptTips #JSForBeginners #WebDevelopment #JSInterviewPrep