refactor: switch from OpenLayers v2 to v10 - #81
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HolgerJeromin
approved these changes
Jun 17, 2026
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This has been a long-running migration. Moving from OpenLayers v2 to v10 turned out to be a much larger effort than it looked at first: core APIs changed significantly, the layer model is different, and a lot of map-related behavior had to be adapted along the way.
I explored a few alternative directions during the process, including Leaflet and MapLibre GL JS, but in the end staying with OpenLayers still seemed like the most practical path. Even so, this upgrade touched a substantial part of the codebase, and I used the opportunity to refactor and clean up a number of related areas as well.
The diff is fairly large, mainly because this is not just a version bump: several OL2-specific abstractions had to be replaced, and behavior that used to be implicit in OL2 is now implemented more explicitly in the application code.
Comparison
Live
Before: https://openingh.openstreetmap.de/
After: https://kristjanesperanto.github.io/opening_hours_map/
Screenshots
Before
After
