What are function constructors in JavaScript?

What are function constructors in JavaScript?

Function constructors in JavaScript are special functions used to create objects. They are defined using the 'function' keyword and are typically capitalized to distinguish them from regular functions.

Can you give me an example of a function constructor?

Sure! Here's a simple example:

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

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

What is the purpose of the 'new' keyword when using function constructors?

The 'new' keyword creates a new object, sets the context of 'this' within the constructor to that new object, and returns it.

Are there any differences between function constructors and class syntax?

Yes, class syntax is a more modern way to create objects and includes features like inheritance and static methods, making it more concise and easier to read.