Leaflet only one placemark visible at exact location, whereas is more than 1 there

Question

I have a problem, because sometimes on my GeoJSON layer plotted into the Leaflet map more than 1 placemarks has been assigned to one exact location (by postcode).

The problem is, that only one of them is visible, whereas there is at least 3-4 another ones.

For example in Google Earth the problem is solved like this: when you hover one placemark, then you can see another ones hidden under the same location, as per in the picture below:

In leaflet this situation not occur and I see only 1 placemark only instead.

I was searching some stuff regarding to this problem and found a following examples:

http://jawj.github.io/OverlappingMarkerSpiderfier-Leaflet/demo.html

https://github.com/jawj/OverlappingMarkerSpiderfier-Leaflet

http://ivansanchez.github.io/Leaflet.Marker.Stack/demos/color_ramps.html

https://stackoverflow.com/questions/50813139/leaflet-map-with-multiple-marker-on-exact-same-position

but they don't really solve this problem

In turn, the links below:

https://stackoverflow.com/questions/22168558/multiple-marker-on-exact-same-position-on-a-leaflet-map/22173475

they are focused on the markercluster, which I don't need.

My situation looks like this:

where as you can see (after the onclick marker trigger) you see 2 jobs on the same location, whereas only 1 appear (always the same in addition).

Could you give me some hint, what should I tweak in the code, to make it pretty much the same, as it's in Google Earth?

Answer 1

Finally I used leaflet-markercluster plugin and implemented into my GeoJSON layers as per the example below:

https://jsfiddle.net/m6jr7e0p/