As previously explained, JavaScript doesn't provide support for interfaces or multiple inheritance. JavaScript allows you to add properties and methods on the fly; therefore, we might create a function that takes advantage of this possibility to emulate multiple inheritance and generate an object that combines two existing objects, a technique known as mix-in.

However, instead of creating functions to create a mix-in, we will create constructor functions and use compositions to access objects within objects. We want to create an application by taking advantage of the feature provided by JavaScript.

function ComicCharacter(nickName) {
  this.nickName = nickName;
}