JS OpenLayers intercept click on marker and get coordinates with button cursor.

js-openlayers-intercept-click.js

map.on("singleclick", function(e) {
	  feature = map.forEachFeatureAtPixel(e.pixel, function(feature) {
	  	return feature;
	  });
	  var coord = feature.getGeometry().getCoordinates();
	  coord = ol.proj.transform(coord,"EPSG:3857","EPSG:4326");
	  console.log(coord);
});

map.on("pointermove", function (evt) {
	var hit = this.forEachFeatureAtPixel(evt.pixel, function(feature, layer) {
		return true;
	}); 
	if (hit) {
		this.getTargetElement().style.cursor = "pointer";
	} else {
		this.getTargetElement().style.cursor = "";
	}
});