<!DOCTYPE html>
    <title>Mousewheel/Trackpad Zoom</title>
    <link rel="stylesheet" href="https://openlayers.org/en/v4.6.4/css/ol.css" type="text/css">
    <!-- 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>
    <div id="map" class="map"></div>
      var map = new ol.Map({
        interactions: ol.interaction.defaults({mouseWheelZoom: false}).extend([
          new ol.interaction.MouseWheelZoom({
            constrainResolution: true // force zooming to a integer zoom
        layers: [
          new ol.layer.Tile({
            source: new ol.source.OSM()
        target: 'map',
        view: new ol.View({
          center: [0, 0],
          zoom: 2

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.