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ES6 Classes in JavaScript

April 5, 2026

ES6 Classes

Syntactic sugar over prototype inheritance.

Class Example

class Person {
    constructor(name, age) {
        this.name = name;
        this.age = age;
    }
    
    greet() {
        return `Hello, I'm ${this.name}`;
    }
    
    static species = "Human";
}

class Student extends Person {
    constructor(name, age, grade) {
        super(name, age);
        this.grade = grade;
    }
}

let student = new Student("John", 20, "A");
console.log(student.greet());

Key Points

  • constructor() initializes object.
  • extends, super() for inheritance.
  • static methods belong to class.
  • Getter/setter: get name() {}.
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