JSFiddle - React, Tailwind, and code Playground

by Daniel Latimer

HTML

<!DOCTYPE html>
<html>
  <head>
    <title>Draggable Polygons</title>
    <script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
    <!-- jsFiddle will insert css and js -->
  </head>
  <body>
    <div id="map"></div>

    <!-- Async script executes immediately and must be after any DOM elements used in callback. -->
    <script
      src="https://maps.googleapis.com/maps/api/js?key=AIzaSyB41DRUbKWJHPxaFjMAwdrzWzbVKartNGg&callback=initMap&v=weekly&channel=2"
      async
    ></script>
  </body>
</html>

CSS

/* Always set the map height explicitly to define the size of the div
       * element that contains the map. */
#map {
  height: 100%;
}

/* Optional: Makes the sample page fill the window. */
html,
body {
  height: 100%;
  margin: 0;
  padding: 0;
}

JavaScript

// This example creates draggable triangles on the map.
// Note also that the red triangle is geodesic, so its shape changes
// as you drag it north or south.
function initMap() {
  const map = new google.maps.Map(document.getElementById("map"), {
    zoom: 4,
    center: { lat: 24.886, lng: -70.268 },
    mapTypeId: "terrain",
  });

  const circle = new google.maps.Circle({
    map,
    center: { lat: 25.774, lng: -80.19 },
    radius: 1000000,
    draggable: true,
    editable: true
  })
  google.maps.event.addListener(circle, 'radius_changed', function() {
    console.log('radius changed:', circle.getRadius());
  });
  google.maps.event.addListener(circle, 'center_changed', function() {
    console.log('center changed:', circle.getCenter());
  });
}