Скачать или смотреть JS interview Q76: Difference between Function Declarations and Function Expressions 🤔

Ever wondered why some functions in JavaScript can be called before they’re even defined — while others throw an error? 🤔
In this short, I break down the key difference between Function Declarations and Function Expressions in the simplest way possible.

Using a real code example:


greet()
function greet() {
console.log("Cooking the Code👨‍🔬");
}

greetExpression()
const greetExpression = function() {
console.log("CTC👨‍🔬");
}

I show you:
✅ What makes function declarations different from expressions
✅ Why function declarations are hoisted — but function expressions aren’t
✅ How function expressions are similar to math equations (like x = 10)
✅ How hoisting actually works in memory during compilation

By the end of this short, you’ll never get confused between the two again — and you’ll clearly understand when and why “not hoisted” errors happen.

Whether you’re preparing for a JavaScript interview, revising ES6 fundamentals, or just want cleaner code — this one’s for you 👨‍💻🔥