What are constructor functions in JavaScript?

What are constructor functions in JavaScript?

Constructor functions are special functions used to create objects in JavaScript. They are defined using a regular function but are intended to be called with the new keyword.

How do I define a constructor function?

You define a constructor function by creating a function that initializes properties of the object. For example:

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

Can you show me how to create an object using a constructor function?

Sure! After defining the constructor function, you can create an object like this:

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

What is the difference between a constructor function and a class?

Constructor functions are the traditional way to create objects, while classes, introduced in ES6, provide a more modern syntax and additional features like inheritance.