JSFiddle - React, Tailwind, and code Playground

HTML

<script src="http://maps.googleapis.com/maps/api/js?sensor=false"></script>

<body>
<div id="googleMap" ></div>

</body>

CSS

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

JavaScript

function initialize()
{
var mapProp = {
  center:new google.maps.LatLng(49.4076800,8.6907900),
  zoom:11,
  mapTypeId:google.maps.MapTypeId.ROADMAP
  };
var map=new google.maps.Map(document.getElementById("googleMap")
  ,mapProp);

var ctaLayer = new google.maps.KmlLayer({
    url: 'http://phanishashank.com/test.kml'
  });
  ctaLayer.setMap(map);
}

google.maps.event.addDomListener(window, 'load', initialize);