JSFiddle - React, Tailwind, and code Playground

HTML

<div id="banner-message">
  <p>Please, specify your date of birth:</p>
  <p><input type="text" id="date" placeholder="YYYY-MM-DD"></p>  
  <button>Submit</button>
  <p>    
  </p>
</div>

JavaScript

$(function () {
     $("#Button1").on("click", function () {
     var x = $('#date').val();
     //const myDate = moment(x, 'YYYY-MM-DD').toDate();  
     alert(x);
     //alert(myDate);
     });
 });