JSFiddle - React, Tailwind, and code Playground

HTML

<p>
test
</p>

JavaScript

document.onmousemove = function (event){
    let whereMouse = document.elementFromPoint(event.pageX , event.pageY);
    console.log(whereMouse.tagName);

    if (whereMouse.tagName != 'HTML') {
    whereMouse.style.backgroundColor = 'red';
                
    }
}

function leave(event) {
    event.target.style.backgroundColor = '' ;
}

for (let elem of document.body.childNodes) {
    if (elem instanceof Element) {
        elem.onmouseleave = leave ;
    }
}