JSFiddle - React, Tailwind, and code Playground

by WhetDawg

JavaScript

var cat = {FirstName:"Sam", Age:4};
console.log(cat.FirstName?.toUpperCase());
console.log(cat.LastName?.toUpperCase() ?? "Thomason");
// console.log(cat.Age?.toUpperCase() ?? "Thomason");
console.log(typeof cat);
console.log(typeof cat.FirstName);
console.log(typeof cat.Age);
console.log(typeof cat.LastName);