constructors.js

const Person=function(name){
  this.name=name;
}

Person.prototype.run=function (){ return `${this.name} is running.`};

Person.prototype.sleep=function (){return `${this.name} is sleeping.`};

let woman=new Person('She'); 
let man=new Person('He');

woman.run(); // @returns "She is running."
man.sleep(); // @returns "He is sleeping."