JSFiddle - React, Tailwind, and code Playground

HTML

<img src="http://www.google.co.uk/images/logos/ps_logo2a_cp.png" width="364" height="126" usemap="#mymap">
<map name="mymap" id="mymap">
    <area data-labelelement="mylabel" shape="rect" coords="0,0,50,50" href="#" />
</map>

<h4 id="mylabel">Stairs</h4>

CSS

#mylabel{ display:none; position:absolute; left:30px; top:30px; }

JavaScript

$('area')
    .hover(function(){
        var labelelement = $(this).data('labelelement');
        $('#' + labelelement ).fadeToggle('fast');
    });