JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://maps.google.com/maps/api/js?sensor=false"></script>
<div class='document_body'>
    <div id="rotation_control"> <small>Enter heading to rotate marker&nbsp;&nbsp;&nbsp;&nbsp;</small>
Heading&deg;
        <input id="rotation_value" type="number" size="3" value="0" onchange="setRotation();" /> <small>&nbsp;&nbsp;&nbsp;&nbsp;Drag marker to place marker</small>

    </div>
    <div id="map_canvas"></div>
</div>

CSS

.document_body {
          margin:0;
          border: 0;
          padding: 10px;
          font-family: Arial, sans-serif;
          font-size: 14px;
          font-weight: bold;
          color: #f0f9f9;
          text-align: center;
          text-shadow: 1px 1px 1px #000;
          background:#1f1f1f;
      }
      #map_canvas, #rotation_control {
          margin: 1px;
          border:1px solid #000;
          background:#444;
          -webkit-border-radius: 4px;
          -moz-border-radius: 4px;
          border-radius: 4px;
      }
      #map_canvas {
          width: 100%;
          height: 360px;
      }
      #rotation_control {
          width: auto;
          padding:5px;
      }
      #rotation_value {
          margin: 1px;
          border:1px solid #999;
          width: 60px;
          padding:2px;
          font-weight: bold;
          color: #00cc00;
          text-align: center;
          background:#111;
          border-radius: 4px;
      }

JavaScript

var map, arrow_marker, arrow_options;
  var map_center = {
      lat: 41.0,
      lng: -103.0
  };
  var arrow_icon = {
      path: 'M -1.1500216e-4,0 C 0.281648,0 0.547084,-0.13447 0.718801,-0.36481 l 17.093151,-22.89064 c 0.125766,-0.16746 0.188044,-0.36854 0.188044,-0.56899 0,-0.19797 -0.06107,-0.39532 -0.182601,-0.56215 -0.245484,-0.33555 -0.678404,-0.46068 -1.057513,-0.30629 l -11.318243,4.60303 0,-26.97635 C 5.441639,-47.58228 5.035926,-48 4.534681,-48 l -9.06959,0 c -0.501246,0 -0.906959,0.41772 -0.906959,0.9338 l 0,26.97635 -11.317637,-4.60303 c -0.379109,-0.15439 -0.812031,-0.0286 -1.057515,0.30629 -0.245483,0.33492 -0.244275,0.79809 0.0055,1.13114 L -0.718973,-0.36481 C -0.547255,-0.13509 -0.281818,0 -5.7002158e-5,0 Z',
      strokeColor: 'black',
      strokeOpacity: 1,
      strokeWeight: 1,
      fillColor: '#fefe99',
      fillOpacity: 1,
      rotation: 0,
      scale: 1.0
  };

  function init() {
      map = new google.maps.Map(document.getElementById('map_canvas'), {
          center: map_center,
          zoom: 4,
          mapTypeId: google.maps.MapTypeId.HYBRID
      });
      arrow_options = {
          position: map_center,
          icon: arrow_icon,
          clickable: false,
          draggable: true,
          crossOnDrag: true,
          visible: true,
          animation: 0,
          title: 'I am a Draggable-Rotatable Marker!'
      };
      arrow_marker = new google.maps.Marker(arrow_options);
      arrow_marker.setMap(map);
  }

  window.setRotation = function () {
      var heading = parseInt(document.getElementById('rotation_value').value);
      if (isNaN(heading)) heading = 0;
      if (heading < 0) heading = 359;
      if (heading > 359) heading = 0;
      arrow_icon.rotation = heading;
      arrow_marker.setOptions({
          icon: arrow_icon
      });
      document.getElementById('rotation_value').value = heading;
  }

  init();