JSFiddle - React, Tailwind, and code Playground

JavaScript

$(document).ready(function() {
    var x = {};
    if (x==null) {
        alert("I am null");
    } else {
        alert(x);
    }
    
    if ($.isEmptyObject(x)) {
        alert("I am empty");
    } else {
        alert(x);
    }
});