JSFiddle - React, Tailwind, and code Playground

HTML

<div id="content"></div>

JavaScript

var message = "ERROR";
var t = document.createTextNode(message);
var node = document.getElementById('content').appendChild(t);
if (document.getElementById('content').innerHTML !== message) {
    
  console.log('element not added');
} else {
  console.log('element added');
}