JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.1.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="https://unpkg.com/leaflet@1.0.2/dist/leaflet.css">
<script src="https://unpkg.com/leaflet@1.0.2/dist/leaflet.js"></script>
 <nav class="navbar navbar-inverse">
  <div class="container-fluid">
    <div class="navbar-header">
      <a class="navbar-brand" href="#">WebSiteName</a>
    </div>
    <ul class="nav nav-pills navbar-nav">
      <li class="active"><a data-toggle="pill" href="#home">Home</a></li>
	<li><a data-toggle="pill" href="#menu1">Menu 1</a></li>

    </ul>
    <ul class="nav navbar-nav navbar-right">
      <li><a href="#"><span class="glyphicon glyphicon-user"></span> Sign Up</a></li>
      <li><a href="#"><span class="glyphicon glyphicon-log-in"></span> Login</a></li>
    </ul>
  </div>
</nav>
<div class="container-fluid">

   <ul class="nav nav-pills">

  </ul>
  
  <div class="tab-content">
    <div id="home" class="tab-pane fade in active ">
    <h1>Title</h1>
    <p>
    some content
    </p>
    </div>
    <div id="menu1" class="tab-pane fade">   
		<h3>Menu 1</h3>
	 	<div id="mapid" style="width: 600px; height: 400px;"></div>
	
    </div>
   
  
  </div>
</div>

JavaScript

var mymap = L.map('mapid').setView([51.505, -0.09], 13);

	L.tileLayer('https://api.tiles.mapbox.com/v4/{id}/{z}/{x}/{y}.png?access_token=pk.eyJ1IjoibWFwYm94IiwiYSI6ImNpandmbXliNDBjZWd2M2x6bDk3c2ZtOTkifQ._QA7i5Mpkd_m30IGElHziw', {
		maxZoom: 18,
		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>, ' +
			'Imagery © <a href="http://mapbox.com">Mapbox</a>',
		id: 'mapbox.streets'
	}).addTo(mymap);
    
    $(document).on('click','[href="#menu1"]',function(){
    	setTimeout(function(){
            window.dispatchEvent(new Event('resize'));
        },300);
    });