Constructor Pattern

Constructor.js

function Human(name, age, occupation){ //ES5 function based constructor 
  //defining properties inside the constructor function
  //constructor initializing the property values upon object creation
  this.name = name; 
  this.age = age;
  this.occupation = occupation;
  //defining a method inside the constructor function
  this.describe = function(){
    console.log(`${this.name} is a ${this.age}-year-old ${this.occupation}`);
  }
}
//creating a "person" object using the Human constructor
//the constructor uses the arguments passed into it to
//initialize the property values name, age and sex
var person = new Human("Elle", "23", "Engineer");
//calling the describe method for the person object
person.describe();

With ES6:

class Shape{
    constructor(color, sides, name){
        this.color = color; 
        this.sides = sides;
        this.name = name;
    }
}