JSFiddle - React, Tailwind, and code Playground

by damir aushenov

JavaScript

alert(Date.prototype.getDate);

var Person = function (firstName, lastName) {
   this.firstName = firstName;
   this.lastName = lastName;
    };
   
    Person.prototype.getFullName = function () {
        return this.firstName + " " + this.lastName;
    };
   Person.prototype.greet = function (person) {
        if (person instanceof Person) {
            return "Hello, " + person.getFullName();
        } else {
            return "Hello, there!";
        }
    };

var person = new Person("John", "Doe"),
    person2 = new Person("Jane", "Doe");

alert(person.greet(person2));