Changes

❇️ New Features

• Map: New export LeafletMap as an alias for Map by @willfarrell in https://github.com/Leaflet/Leaflet/pull/9804
• Control.Layer: New option collapseDelay by @fyyyyy in https://github.com/Leaflet/Leaflet/pull/9612

✨ Refactorings (⚠️ Breaking Changes)

• Fully converted all classes to ESM by @simon04 in https://github.com/Leaflet/Leaflet/pull/9677
• Use optional chaining with function calls by @simon04 in https://github.com/Leaflet/Leaflet/pull/9737

❌ Removed Features (⚠️ Breaking Changes)

• Drop aliased functions addEventListener, removeEventListener, addOneTimeEventListener, fireEvent, hasEventListeners on Evented by @lukewarlow in https://github.com/Leaflet/Leaflet/pull/9781
• Drop aliased functions addListener, removeListener on DomEvent by @Falke-Design in https://github.com/Leaflet/Leaflet/pull/9834

🐞 Bugfixes

• Cleanup map.locate() by @jorri11 in https://github.com/Leaflet/Leaflet/pull/9746
• Popup width by @IvanSanchez in https://github.com/Leaflet/Leaflet/pull/9765
• Fix overlay shifting with new BlanketOverlay by @Falke-Design in https://github.com/Leaflet/Leaflet/pull/9822

For more information checkout the blog post: https://leafletjs.com/2025/05/18/leaflet-2.0.0-alpha.html