How to add here hover that when hover then download button show other wise not show

Do it with css like

.row-with-download:hover button {
display: block;
}

or like

const [isShown, setIsShown] = useState(false);


<Row onMouseEnter={() => setIsShown(true)}
        onMouseLeave={() => setIsShown(false)}> 

{isShown && <button/>}