JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
        <link rel="stylesheet" href="https://unpkg.com/[email protected]/dist/leaflet.css" integrity="sha512-puBpdR0798OZvTTbP4A8Ix/l+A4dHDD0DGqYW6RQ+9jxkRFclaxxQb/SJAWZfWAkuyeQUytO7+7N4QKrDh+drA==" crossorigin=""/>
        <script src="https://unpkg.com/[email protected]/dist/leaflet.js" integrity="sha512-nMMmRyTVoLYqjP9hrbed9S+FzjZHW5gY1TWCHA5ckwXZBadntCNs8kEqAWdrb9O7rxbCaA4lKTIWjDXZxflOcA==" crossorigin=""></script>
        <style>
            /* Set height of body and the document to 100% to enable "full page tabs" */
            body, html {
                height: 100%;
                margin: 0;
                font-family: sans-serif;
            }

            /* Style tab links */
            .tablink {
                background-color: #9f9f9f;
                color: black;
                float: left;
                border: none;
                outline: none;
                cursor: pointer;
                padding: 5px;
                font-size: 16px;
                width: 33.33%;
            }

            .tablink:hover {
                background-color: #7f7f7f;
            }

            /* Style the tab content (and add height:100% for full page content) */
            .tabcontent {
                color: black;
                background-color: white;
                display: none;
                padding: 15px 5px;
                height: 95%;
            }

            .map {
                float: left;
                width: 34.8%;
                height: 100%;
                border-radius: 5px 5px 0px 0px;
                border-width: 1px;
                border-style: dotted;
                border-color: #000000;
            }

        </style>
    </head>

    <body>
        <button class="tablink" onclick="openPage('Europe', this)" id="defaultOpen">Europe</button>
        <button class="tablink" onclick="openPage('Asia',...