leaflet-side-by-side | Leaflet control to add a split screen | Frontend Framework library

After trying out different configurations, I think the only way to get the layer to fire its requests again post-update is to create it alongside the map in useEffect. The LeafletLockedLayer I wrote cannot be used inside useEffect (since it uses hooks), but a simple way to get around that is to replace its own useEffect by a makeshift one with setTimeout/setInterval. Although I'd rather not use those, I don't have time to look for a better solution, and the time it takes to read the password is shorter than loading the tiles anyway.

Here's a working LeafletLockedLayer than can be created inside the same useEffect as the map like it is meant to: