JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html>
  <head>
    <title>JC3</title>
    <meta charset="utf-8"/>
    <meta name="viewport" content="initial-scale=1.0, user-scalable=no"/>
    <link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet-0.6.4/leaflet.css" />
    <!--[if lte IE 8]>
    <link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet-0.6.4/leaflet.ie.css" />
    <![endif]-->
    <script src="http://cdn.leafletjs.com/leaflet-0.6.4/leaflet.js" charset="utf-8"></script>
    <script>
      function init() {
        var mapMinZoom = 0;
        var mapMaxZoom = 3;
        var map = L.map('map', {
          maxZoom: mapMaxZoom,
          minZoom: mapMinZoom,
          crs: L.CRS.Simple
        }).setView([0, 0], mapMaxZoom);
		

		
	window.latLngToPixels = function(latlng){
    return window.map.project([latlng.lat,latlng.lng], window.map.getMaxZoom());
	};
	window.pixelsToLatLng = function(x,y){
    return window.map.unproject([x,y], window.map.getMaxZoom());
	};
        
        var mapBounds = new L.LatLngBounds(
            map.unproject([0, 8576], mapMaxZoom),
            map.unproject([8576, 0], mapMaxZoom));
            
        map.fitBounds(mapBounds);
        L.tileLayer('{z}/{x}/{y}.jpg', {
          minZoom: mapMinZoom, maxZoom: mapMaxZoom,
          bounds: mapBounds,
          noWrap: true,
          tms: false
        }).addTo(map);
		
		L.marker([0, 0]).addTo(map).bindPopup("Zero");
		
		L.marker([-128, 128]).addTo(map).bindPopup("center");
		
		var popup = L.popup();
		
		<!-- Click pop-up>
		var popup = L.popup();

		function onMapClick(e) {
			popup
			.setLatLng(e.latlng)
			.setContent("You clicked in " + e.latlng.toString ())
			.openOn(map);
		}

		map.on('click', onMapClick);
		
      }
    </script>
    <style>
      html, body, #map { width:100%; height:100%; margin:0; padding:0; }
    </style>
  </head>
  <body onload="init()">
    <div id="map"></div>
  </body>
</html>