Summary  
This chapter explains how ES6 class constructors provide a special method that automatically initializes new object instances with custom property values passed as arguments.  

General domain of usage  
User profile management (e.g., creating and initializing Person objects)

Learn how class constructors work in JavaScript ES6. This video explains the role of the constructor method inside a class definition. See how the constructor is automatically called when you create a new object using the 'new' keyword. Understand how you can use the constructor to set up initial property values by passing arguments, ensuring each new object starts with the correct state. Watch step-by-step examples that show how to define a constructor and initialize properties for your JavaScript classes.

When you create a new object from a class in JavaScript, you often want to set up its initial state—such as assigning values to its properties. This is where the **constructor method** comes in. The `constructor` is a special method inside a class definition that is automatically called when you use the `new` keyword to create an instance of the class. You can use it to set up the properties of the object with specific values, usually by passing arguments to the constructor when creating the object.

class Person {
  constructor(name, age) {
    this.name = name;
    this.age = age;
  }
}

const user = new Person("Alice", 30);
console.log(user.name); // "Alice"
console.log(user.age); // 30

What is the main purpose of the `constructor` method in an ES6 class?

Explore how modern JavaScript uses classes to organize logic, model real-world objects, and build reusable, maintainable code. Work with constructors, methods, inheritance, and encapsulation to understand how object-oriented patterns shape application structure. Apply advanced class features and build practical class designs that strengthen your ability to write clean, scalable JavaScript.

Build a clear understanding of how modern JavaScript implements object-oriented programming. Explore the shift from prototype-based design to ES6 classes, create your first class structures, and learn how constructors, methods, and this work together inside class definitions.

Extend class functionality with inheritance patterns that model real-world relationships. Override behavior, call parent constructors, and apply encapsulation techniques using getters, setters, and private fields to protect internal state and enforce clean APIs.

Strengthen your OOP skills with advanced class capabilities and compare class-based and prototype-based approaches. Apply everything by designing practical User and Account classes, reinforcing how object-oriented design translates into real applications.

Class Constructors