The new Keyword in JavaScript

If you've ever written new Person("Alice") and wondered what's actually happening behind the scenes — this post is for you. what is constructor function? A constructor function is just a regular function, but by convention we capitalize its name to signal it should be called with new. function Person(name, age) { this.name = name; this.age = age; } Inside it, this refers to the new object being built. That's the key idea. What does new actually do? When you write: const alice = new Person("Alice", 30); JavaScript silently does four things for you: Creates a brand-new empty object // internally: const this = {}; 2.Links it to the constructor's prototype // internally: this.__proto__ = Person.prototype; This is how alice can call methods like greet() even though they aren't stored on alice itself. 3.Runs the constructor body with this as that new object this.name = "Alice"; 4.Returns the object automatically.You don't need a return statement — new handles it Putting methods on the protot