JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://maps.googleapis.com/maps/api/js?sensor=false&amp;libraries=geometry,places&amp;ext=.js"></script>
<div id="map-canvas" style="border: 2px solid #3872ac;"></div>
<input id="hide" type="button" value="hide" />
<input id="show" type="button" value="show" />

CSS

html, body, #map-canvas {
    height: 500px;
    width: 500px;
    margin: 0px;
    padding: 0px
}

JavaScript

function initialize() {
  var mapOptions = {
    zoom: 3,
    center: new google.maps.LatLng(0, -180),
    mapTypeId: google.maps.MapTypeId.TERRAIN
  };

  var map = new google.maps.Map(document.getElementById('map-canvas'),
      mapOptions);

  var flightPlanCoordinates = [
    new google.maps.LatLng(37.772323, -122.214897),
    new google.maps.LatLng(21.291982, -157.821856),
    new google.maps.LatLng(-18.142599, 178.431),
    new google.maps.LatLng(-27.46758, 153.027892)
  ];
  var flightPath = new google.maps.Polyline({
    path: flightPlanCoordinates,
    geodesic: true,
    strokeColor: '#FF0000',
    strokeOpacity: 1.0,
    strokeWeight: 2
  });

  flightPath.setMap(map);
    google.maps.event.addDomListener(document.getElementById('hide'), 'click', function() {
        flightPath.setOptions({strokeOpacity:0});
    });
   google.maps.event.addDomListener(document.getElementById('show'), 'click', function() {
       flightPath.setOptions({strokeOpacity:1.0});
    });
    
}

google.maps.event.addDomListener(window, 'load', initialize);