JSFiddle - React, Tailwind, and code Playground

CSS

p { position: absolute; top: 0; left: 0; }

JavaScript

function test(a) {
    var a=document.createElement(a);
    a.style.visibility = "hidden";
    document.body.appendChild(a);
    a.appendChild(document.createTextNode("Hello"));
    a.style.fontStyle = "italic";
    a.style.top=(window.innerHeight/2-a.clientHeight/2)+'px';
    a.style.visibility = "";
    return a;
}

test("p").style.background = "#0f0";