Classes

Short explanation

ES6 classes provide a clearer syntax for constructor functions and prototype-based inheritance while still using prototypes under the hood.

Syntax example

class Person {
  constructor(name) {
    this.name = name;
  }
  greet() {
    return `Hi, ${this.name}`;
  }
}
const p = new Person('Alex');

How JS handles it internally

Classes are syntactic sugar; the runtime sets up prototype links and class methods live on the prototype. super and extends involve prototype chain manipulation.

FAQ

Q: Are classes faster than functions + prototypes?

A: Performance is comparable; classes are about readability and clearer semantics.