JSFiddle - React, Tailwind, and code Playground

HTML

<script type="text/javascript"
  src="http://maps.google.com/maps/api/js?sensor=false">
</script>
<style type="text/css">
  html { height: 100% }
  body { height: 100%; margin: 0px; padding: 0px }
  #map_canvas { height: 100% }
</style>

<div id="map_canvas" style="width:100%; height:100%"></div>

JavaScript

// init map
var myOptions = {
  mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
    
// init directions service
var dirService = new google.maps.DirectionsService();
var dirRenderer = new google.maps.DirectionsRenderer({suppressMarkers: true});
dirRenderer.setMap(map);

// highlight a street
var request = {
  origin: "48.1252,11.5407",
  destination: "48.13376,11.5535",
  //waypoints: [{location:"48.12449,11.5536"}, {location:"48.12515,11.5569"}],
  travelMode: google.maps.TravelMode.DRIVING
};
dirService.route(request, function(result, status) {
  if (status == google.maps.DirectionsStatus.OK) {
    dirRenderer.setDirections(result);
  }
});