JSFiddle - React, Tailwind, and code Playground

HTML

<div data-elem-ID="HTML"></div>
<!-- Change the to jQuery 1.6.3 and data will show up in IE -->

JavaScript

var data = $('div').data();
alert([
   'elemId: '+data['elemId'], // FF, VALID
   'elemID: '+data['elemID'], // IE, Invalid
].join('\n'));