Describe a data structure : The Prototype Object

The video tutorial explains the concept of prototype objects in JavaScript, highlighting how they allow multiple objects to share properties and methods efficiently. It demonstrates adding properties and methods to a constructor function's prototype, which are then accessible to all instances via their dunder proto. This approach keeps instances lean and clean, ensuring shared functionality without redundancy.

What is the significance of the 'dunder proto' in JavaScript?

Describe how methods can be shared among instances of a constructor function.

How does using a prototype help in keeping instances lean and cleaner?