ThomasG77/index.html

## index.html
<!DOCTYPE html>
<html>
  <head>
    <meta charset=utf-8>
    <meta name=description content="">
    <meta name=viewport content="width=device-width, initial-scale=1">
    <title>Simple Map with default interactions</title>
    <link rel="stylesheet" href="https://openlayers.org/en/v4.6.4/css/ol.css" type="text/css">
    <style>
      html, body {
        height: 100%;
        padding: 0;
        margin: 0;
      }
      #map {
        width: 100%;
        height: 60%;
      }
    </style>
    <!-- The line below is only needed for old environments like Internet Explorer and Android 4.x -->
    <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"></script>
    <script src="https://openlayers.org/en/v4.6.4/build/ol.js"></script>
  </head>
  <body>
    <div id="map" class="map"></div>
    <label for="mouse-anchor">
      Mouse anchor when using wheelzoom
      <input id="mouse-anchor" type="checkbox" checked="checked">
    </label>
    <script>
      const defaultInteractions = ol.interaction.defaults();
      const mouseWheelInteraction = defaultInteractions.getArray().find(el => el instanceof ol.interaction.MouseWheelZoom);
      const map = new ol.Map({
        interactions: defaultInteractions,
        layers: [
          new ol.layer.Tile({
            source: new ol.source.OSM()
          })
        ],
        target: 'map',
        view: new ol.View({
          center: [0, 0],
          zoom: 2
        })
      });

      document.getElementById('mouse-anchor').addEventListener('change', function() {
        mouseWheelInteraction.setMouseAnchor(this.checked);
      });
    </script>
  </body>
</html>
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset=utf-8>
	<meta name=description content="">
	<meta name=viewport content="width=device-width, initial-scale=1">
	<title>Simple Map with default interactions</title>
	<link rel="stylesheet" href="https://openlayers.org/en/v4.6.4/css/ol.css" type="text/css">
	<style>
	html, body {
	height: 100%;
	padding: 0;
	margin: 0;
	}
	#map {
	width: 100%;
	height: 60%;
	}
	</style>
	<!-- The line below is only needed for old environments like Internet Explorer and Android 4.x -->
	<script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Element.prototype.classList,URL"></script>
	<script src="https://openlayers.org/en/v4.6.4/build/ol.js"></script>
	</head>
	<body>
	<div id="map" class="map"></div>
	<label for="mouse-anchor">
	Mouse anchor when using wheelzoom
	<input id="mouse-anchor" type="checkbox" checked="checked">
	</label>
	<script>
	const defaultInteractions = ol.interaction.defaults();
	const mouseWheelInteraction = defaultInteractions.getArray().find(el => el instanceof ol.interaction.MouseWheelZoom);
	const map = new ol.Map({
	interactions: defaultInteractions,
	layers: [
	new ol.layer.Tile({
	source: new ol.source.OSM()
	})
	],
	target: 'map',
	view: new ol.View({
	center: [0, 0],
	zoom: 2
	})
	});

	document.getElementById('mouse-anchor').addEventListener('change', function() {
	mouseWheelInteraction.setMouseAnchor(this.checked);
	});
	</script>
	</body>
	</html>