In Java you could do something like:

Person adam = new Person();

In JavaScript you would do:

var adam = new Person();

JavaScript’s constructor invocation looks as if

Person were a class, but it’s important to keep in mind that Person is still just a function.

Principle

When it comes to adopting an inheritance pattern for your project, you have quite a few options. You should always strive for picking a modern pattern, unless the team is really uncomfortable if there are no classes involved.

References: 

JavaScript Patterns - by Stoyan Stefanov (O`Reilly)