JSFiddle - React, Tailwind, and code Playground

HTML

<body onload="aviso()">
    
    <div id="divRojo">
        Div Rojo 
    </div>
    
</body>

CSS

#divRojo {
    width:100px;
    height:100px;
    background:red;
    left:200px;
    top:200px;
    position:static;
}

JavaScript

function aviso(){         
    alert("top: "+document.getElementById("divRojo").style.top);         
    alert("position: "+document.getElementById("divRojo").style.position);     
}