JSFiddle - React, Tailwind, and code Playground

HTML

<div class="li"><a href="#"><img src="http://linkaupairgeneva.net/theme/default/images/btnPhotoAlbum.png"></a></div>

CSS

.current{
  background:#fff;
    opacity:0.5;
}

JavaScript

$(".li").live("mouseover",function(){
    $('.current').removeClass('current');
    $(this).addClass('current');
  },
  function () {
    $(this).removeClass("current");
  }
);