When a custom Element marker's rotation exceeds ±90°, normalize the
rotation into the upright range and apply scaleX(-1) to the inner
element. This keeps side-view icons (ships, vehicles) right-side up
regardless of heading direction.
Use a wrapper div for custom elements so MapLibre rotates the container
while the inner SVG can be independently flipped.
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
