*JavaScript interview questions with answers*! 🚀 1. *What are the different data types in JavaScript?* String, Number, Boolean, Undefined, Null, Symbol, BigInt, and Object. 2. *What is hoisting in JavaScript?* Hoisting is JavaScript’s behavior of moving variable and function declarations to the top of their scope before code execution. 3. *Explain closures.* A closure is a function that remembers its outer scope even after the outer function has finished executing. 4. *What is the difference between `==` and `===`?* `==` checks for value equality with type conversion, while `===` checks for both value and type equality. 5. *What are first-class functions?* Functions in JavaScript can be assigned to variables, passed as arguments, and returned from other functions—making them first-class citizens. 6. *What is a promise?* A promise is an object that represents the eventual completion or failure of an asynchronous operation. 7. *How do you handle errors in JavaScript?* By using `try`, `catch`, and `finally` blocks to catch and manage exceptions. 8. *What is an IIFE?* Immediately Invoked Function Expression—runs as soon as it’s defined. 9. *What are arrow functions?* Arrow functions are a shorter syntax for writing functions, introduced in ES6, and they don’t have their own `this`. 10. *What is event delegation?* Event delegation lets you handle events at a parent level instead of adding listeners to individual child elements. *React ❤️ for more*