JSFiddle - React, Tailwind, and code Playground

JavaScript

var obj = {};
var obj2 = null;

alert("Is object an object? "+isObject(obj));
alert("Is object an object2? "+isObject(obj2));

alert("Is object an object? "+isObjectBad(obj));
alert("Is object an object2? "+isObjectBad(obj2));

function isObject(inputVar) {
  return inputVar instanceof Object;
}
function isObjectBad(inputVar) {
  return typeof inputVar === 'object';
}