What is the Spread Operator in JavaScript?

The spread operator (...) is a simple but powerful feature in modern JavaScript. It allows developers to expand elements of arrays or properties of objects into new structures. ## How It Works The three dots (...) take values from an existing array or object and spread them into a new one. Example with Arrays const numbers = [ 1 , 2 , 3 ]; const copy = [... numbers ]; This creates a shallow copy. We can also add new values: const extended = [... numbers , 4 , 5 ]; Example with Objects const user = { name : " John " , age : 25 }; const updatedUser = { ... user , city : " Delhi " }; This copies properties and adds new ones. Why It Matters The spread operator: Makes code shorter and cleaner Prevents accidental mutation Is widely used in modern frameworks Final Thought The spread operator may look small, but it plays a big role in writing clean and maintainable JavaScript.