JSFiddle - React, Tailwind, and code Playground

by wladyband

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.15.1/moment.js"></script>
<input type="button" value="Check Date"  class="validateDate"/>

JavaScript

$(function(){
  var dateFormat = 'DD-MM-YYYY';
  $('.validateDate').click(function(){
  if (moment(moment("2019/12").format(dateFormat),dateFormat,true).isValid()) {
  	alert("Data valida");
  } else {
  	alert("Data invalida");
  }
  });
});