What are class constructors in JavaScript?

What are class constructors in JavaScript?

Class constructors are special methods for creating and initializing objects in a class. They are defined using the constructor keyword.

Can you give me an example of a class constructor?

Sure! Here's a simple example:

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

const john = new Person('John', 30);
console.log(john.name); // John

What happens if I don't define a constructor?

If you don't define a constructor, JavaScript provides a default constructor that does nothing. It allows you to create instances of the class without any initialization.

Can constructors have parameters?

Yes, constructors can take parameters, which can be used to initialize object properties when creating an instance.