JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://leafletjs.com/dist/leaflet.css">
<script src="http://leafletjs.com/dist/leaflet.js"></script>
<script src="https://rawgithub.com/indus/Leaflet/master/src/layer/tile/TileLayer.WMS.incrementalSingleTile.js"></script>
<div id="map" style="height: 100%"></div>

CSS

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

JavaScript

var map = L.map('map', {
    crs: L.CRS.EPSG4326,
    zoomControl: false,
    attributionControl: false,
    zoom: 2,
    center: [20, 0]
});

L.tileLayer.wmsIncrementalSingleTile("http://geoservice.dlr.de/eoc/basemap/wms", {
    layers: 'eoc:world_relief_bw',
    format: 'image/png',
    transparent: "TRUE",
    unloadInvisibleTiles: false // unload is not managed yet
}).addTo(map);