LocationIQ Maps - Developer Samples (Web)

<!doctype html>
<html lang="en">
<head>
<link rel="stylesheet" href="https://tiles.locationiq.com/v3/libs/openlayers/8.2.0/ol.css" type="text/css">
<script src="https://tiles.locationiq.com/v3/libs/openlayers/8.2.0/ol.js"></script>
<style>
            body { margin:0px; padding:0px; }
            #map { position:absolute; top:0px; bottom:0px; width:100%; }
        </style>
<script src="https://tiles.locationiq.com/v3/libs/olms/12.0.0/olms.js" type="text/javascript"></script>
<title>Add a marker</title>
</head>
<body>
<style>
            .marker {
                display: block;
                border: none;
                cursor: pointer;
                padding: 0;
            }
            
        </style>
<div id="map"></div>
<script type="text/javascript">
            var key = 'pk.aa7f5d0539c5675b7f3429402939d8fa';   //Insert your LocationIQ access token here

            var styleJson = 'https://tiles-staging.locationiq.com/v3/streets/vector.json?key=' + key;

            const map = new ol.Map({
                target: 'map',
                view: new ol.View({
                    center: ol.proj.fromLonLat([-122.42, 37.779]),
                    zoom: 12
                })
            });
  

            //to create a marker
            var marker1 = new ol.Feature({
                geometry: new ol.geom.Point(
                    ol.proj.fromLonLat([-122.444733, 37.767443])
                ),
                name: 'marker1'
            });

            //to enhance style and add icon to the map
            marker1.setStyle(new ol.style.Style({
                image: new ol.style.Icon({ 
                    scale: 0.5,               //scale to adjust the proportion of the icon   
                    src: 'https://tiles.locationiq.com/static/images/marker.png',           //link of the icon
                })
            }));

            //to create a marker
            var marker2 = new ol.Feature({
                geometry: new ol.geom.Point(
                    ol.proj.fromLonLat([-122.4727000, 37.786258])
                ),
                name: 'marker2'  
            });

            //to enhance style and add icon to the map
            marker2.setStyle(new ol.style.Style({
                image: new ol.style.Icon({ 
                    scale: 0.5,                 //scale to adjust the proportion of the icon   
                    src: 'https://tiles.locationiq.com/static/images/marker50px.png',             //link to the icon
                })
            }));

            //Let’s include the markers and create a vector source with it
            var vectorSource = new ol.source.Vector({
                features: [marker1, marker2]          
            });

            //Let’s create a vector layer, with a source created above
            var vectorLayer = new ol.layer.Vector({
                source: vectorSource,
                zIndex: 1
            });

            map.addLayer(vectorLayer);

            olms.apply(map, styleJson);
        </script>
</body>
</html>