JSFiddle - React, Tailwind, and code Playground

HTML

<body>
    <div id='div'></div>
</body>

JavaScript

cookie=false
if(cookie){
    document.getElementById('div').innerHTML="It's Work!"
}
//Или:
ccookie=true
if(ccookie){
    var element=document.createElement('i')
    element.innerHTML='Я текст в теге i внутри div'
    document.getElementById('div').appendChild(element)

}