JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://rawgit.com/eu81273/jsfiddle-console/master/console.js"></script>

JavaScript

const arr = [{foo:'bar'}];
const arrBeforeChecks = JSON.stringify(arr);

arr[0].foo = 'fizz';

//arr.push({foo:'bar'});

if (arrBeforeChecks !== JSON.stringify(arr)) {
	console.log('difference was made');
} else {
	console.log('NO DIFF');
}