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COTypes of Functions in JavaScript — Quick Reference
Understanding function types is fundamental to writing clean, scalable, and modern JavaScript.
This visual guide breaks down the most commonly used function patterns — including hoisting behavior, syntax differences, and modern ES6 features.
💡 What you’ll learn: ✔ Function Declarations and hoisting behavior
✔ Function Expressions and variable assignment rules
✔ Arrow Functions and lexical this
✔ Important concepts like callbacks, IIFE, and anonymous functions
✔ TDZ (Temporal Dead Zone) with let and const
Whether you're preparing for interviews, improving code quality, or strengthening your JS fundamentals — this is a must-know reference.
🧠 Pro Tip
Function declarations are fully hoisted, while expressions and arrow functions follow variable hoisting rules — especially important when using let and const.
javascript, js functions, function declaration, function expression, arrow function, es6, hoisting, temporal dead zone, tdz, callbacks, iife, web development, frontend development, programming fundamentals
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