Cancel cluster expansion event based on condition

[qpary]

Hi !
Same as Issue 1101 I wanted to cancel the expansion of cluster based on condition.

But it seems like i cannot stop the propagation of the events.
I tried the solution "attach the event handler before any layer is added to L.MarkerClusterGroup" but the cluster keeps expanding. Maybe there is something I dont understand about leaflet layer and event.

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How to reproduce

• Leaflet version I'm using: 1.9.4
• Leaflet.MarkerCluster version I'm using: 1.4.1
• Browser (with version) I'm using: Latest firefox
• OS/Platform (with version) I'm using: Macos

What behaviour I'm expecting and which behaviour I'm seeing

Im expecting the cluster to not open while clicking and another condition (in my example command key). I already logged, I'm entering the condition
Im seing the cluster to expand and the map to zoom

Minimal example reproducing the issue

jsFiddle

• this example is as simple as possible
• this example does not rely on any third party code

[qpary]

I followed the step here https://github.com/Leaflet/Leaflet.markercluster/blob/master/CONTRIBUTING.md to generate the js source file from master. It's not an official version of this plugin, but since I saw a commit related to this issue. I tried my luck and it seems like working as intended and the event is blocked.