there is already a working script for OL 3.
https://next.plnkr.co/edit/DXnDfStbvbetOtdU
Is there anyone who can rewrite that in OL 5?
Please as in the example for OL 3 without Ajax, JQuery and NodeJS. Please include with: https://cdn.rawgit.com/openlayers/openlayers.github.io/master/en/v5.3.0/css/ol.css https://cdn.rawgit.com/openlayers/openlayers.github.io/master/en/v5.3.0/build/ol.js