JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.1.0/jquery.js"></script>
 <button id="map">Click Here</button>

CSS

html, body {
        height: 100%;
        margin: 0;
        padding: 0;
      }
      #map {
        
      }

JavaScript

$(document).ready(function () {
$( "#map" ).click(function() {
var mode = localStorage.getItem("parent");
  alert('I am the iframe'+mode);
});
});