JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.0.0-beta1/jquery.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.3/underscore-min.js"></script>

JavaScript

$(document).ready(function() {
/*function concept() {
  this.ConceptId = 0;
  this.Name = "";
}*/

  var concept = new concept;
	alert(concept.ConceptId);  
});

function concept() {
  this.ConceptId = 0;
  this.Name = "";
}