JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet-0.6.4/leaflet.css">
<script src="http://cdn.leafletjs.com/leaflet-0.6.4/leaflet.js"></script>
<div id="map"></div>

CSS

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

JavaScript

var map, newMarker, markerLocation;
$(function(){
	// Initialize the map
  
  
	var map = L.map('map').setView([38.487, -75.641], 8);
	L.tileLayer('http://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png', {
    	attribution: 'Map data &copy; <a href="http://openstreetmap.org">OpenStreetMap</a> contributors, <a href="http://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>',
    	maxZoom: 18
	}).addTo(map);
  
  
	newMarkerGroup = new L.LayerGroup();
	map.on('click', addMarker);
  
  
  
  function addMarker(e){
	// Add marker to map at click location; add popup window
    var newMarker = new L.marker(e.latlng).addTo(map);
}
});