Dévoiler une image en background

<script>
$(document).ready(function() {
 let $magic = $(".hover-wrapper"),
     magicWHalf = $magic.width() / 2;
 $(document).on("mousemove", function(e) {
   $magic.css({"left": e.pageX - magicWHalf, "top": e.pageY - magicWHalf});
 });
});
</script>