Advanced

Access the underlying MapLibre GL map instance to use any feature from the MapLibre GL JS API. You can use either a ref or the useMap hook.

The simplest way to access the map instance. Use a ref to call map methods from event handlers or effects.

import { Map, type MapRef } from "@/components/ui/map";
import { useRef } from "react";

function MyMapComponent() {
  const mapRef = useRef<MapRef>(null);

  const handleFlyTo = () => {
    // Access the MapLibre GL map instance via ref
    mapRef.current?.flyTo({ center: [-74, 40.7], zoom: 12 });
  };

  return (
    <>
      <button onClick={handleFlyTo}>Fly to NYC</button>
      <Map ref={mapRef} center={[-74, 40.7]} zoom={10} />
    </>
  );
}

For child components rendered inside Map, use the useMap hook to access the map instance and listen to events.

import { Map, useMap } from "@/components/ui/map";
import { useEffect } from "react";

// For child components inside Map, use the useMap hook
function MapEventListener() {
  const { map, isLoaded } = useMap();

  useEffect(() => {
    if (!map || !isLoaded) return;
    
    const handleClick = (e) => {
      console.log("Clicked at:", e.lngLat);
    };

    map.on("click", handleClick);
    return () => map.off("click", handleClick);
  }, [map, isLoaded]);

  return null;
}

// Usage
<Map center={[-74, 40.7]} zoom={10}>
  <MapEventListener />
</Map>

This example shows how to create custom controls that manipulate the map's pitch and bearing, and listen to map events to display real-time values.

Add custom GeoJSON data as layers with fill and outline styles. This example shows NYC parks with hover interactions.

When displaying hundreds or thousands of markers, use GeoJSON layers instead of DOM-based MapMarker components. This approach renders markers on the WebGL canvas, providing significantly better performance.

You can extend this to build custom features like:

• Real-time tracking - Live location updates for delivery, rides, or fleet management
• Geofencing - Trigger actions when users enter or leave specific areas
• Heatmaps - Visualize density data like population, crime, or activity hotspots
• Drawing tools - Let users draw polygons, lines, or place markers for custom areas
• 3D buildings - Extrude building footprints for urban visualization
• Animations - Animate markers along routes or create fly-through experiences
• Custom data layers - Overlay weather, traffic, or satellite imagery