JSFiddle - React, Tailwind, and code Playground

JavaScript

// Create a person object
var person = {
    "first_name": "Carl",
    "last_name": "Fredricksen",
    "age": 78,
    "mood": "cranky",
    "movie": "Up"
};

// Create a variable "msg" that we'll use to alert later
var msg = person.first_name + " " + person.last_name + " is very " + person['mood'] + ".";

// Alert the msg
alert(msg);