When dragging a marker in a multi-client PubSub setup, the server echoes
position updates back to the originating client. The data-effect would
then call setLngLat with the stale echoed position, snapping the marker
back while the user had already dragged further.
Add a per-marker _dragging flag: set on dragstart, cleared after the
final dragend writeback. The signal→position effect skips setLngLat
(and rotation) while the flag is true.
Provides a Go API for interactive maps within Via applications:
- Plugin serves vendored MapLibre GL JS v4.7.1 assets
- Map struct with pre/post-render source, layer, marker, popup management
- Viewport signal sync (center, zoom, bearing, pitch) via hidden inputs
- FlyTo, SetCenter, SetZoom and other viewport setters via ExecScript
- Idempotent init script with SPA cleanup via MutationObserver
- Example app demonstrating markers, GeoJSON layers, and FlyTo actions
