JSFiddle - React, Tailwind, and code Playground
HTML
<div id="menu"><table><tr><td>x</td></tr><tr><td>y</td></tr></table></div>
<div id=cFloatBottomMenu onclick="javascript:showMenu();" ></div>
CSS
#menu{ width: 200px; position:relative; bottom:0px; }
#cFloatBottomMenu {background-color:#D20000; height:100px; width:100%; margin-top:40px;}
JavaScript
function showMenu()
{
alert('pressed');
('#menu').css('display','block');
}