Zoom with mouse wheel

Good afternoon!

When editing a map, I can use my mouse wheel to zoom. But on the map displayed on the site, the wheel does not seem to have any effect, and I have to use the “+/-” bottons.
Is there a way to use the wheel?

http://salliance.be/blog/voyage-aller/

https://ww.wp.xz.cn/plugins/nomad-world-map/