JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="//netdna.bootstrapcdn.com/font-awesome/3.2.1/css/font-awesome.css">

JavaScript

var x= {}
var y= {x:'hi'}
console.log(Object.keys(x).length==0)
console.log(Object.keys(y).length==0)