Скачать или смотреть Can u guess the output?

In this JavaScript short, we look at a sneaky interview question that catches many developers off guard: what happens when you call a function before assigning it using var? The code greet(); var greet = function() { console.log("hi"); } might look innocent, but it throws a TypeError: greet is not a function. That’s because in JavaScript, var declarations are hoisted to the top, but their assignments are not. So during the function call, greet exists but is undefined, and calling undefined() throws an error. This is a classic example of hoisting behavior in JavaScript, and it highlights the difference between function declarations and function expressions. Function declarations are hoisted along with their definitions, so you can safely call them before they're defined. But function expressions (like in this example) are only hoisted as variables, not as actual functions. It’s an important lesson in how JavaScript’s execution context works, and why using let or const — or at least being careful with var


#JavaScript #jsinterviewquestions #frontendinterview #webdevelopment #developerlife #hoisting #javascripttricks #functionexpression #functiondeclaration #learnjavascript #codingtips #techinterview #temporaldeadzon #jsquiz #jschallenge #varvsletvsconst #javascriptshorts #ytshorts #typeof #javascriptgotcha #jsmistakes #javascriptfundamentals #jsquestions #jsdevelopers #frontendtips #debuggingjavascript #ecmascript #scoped #interviewprep #programmingtips