How can a TypeScript definition file for the MarkerCluster LeafletJS plugin be created?

edit

1. Go to the MarkerCluster repository on GitHub and look for the file "leaflet.markercluster.js".
2. Download the file and rename it to "leaflet.markercluster.d.ts".
3. Open the file in a text editor.
4. Add the following code at the beginning of the file:

declare namespace L {
  /**
   * Creates a Marker Cluster Group layer that adds its child markers to a cluster
   * given the specified options.
   */
   function markerClusterGroup(options?: MarkerClusterGroupOptions): MarkerClusterGroup;

  /**
   * Options for creating a Marker Cluster Group
   */
   interface MarkerClusterGroupOptions extends LayerOptions {
      spiderfyOnMaxZoom?: boolean;
      showCoverageOnHover?: boolean;
      zoomToBoundsOnClick?: boolean;
      maxClusterRadius?: number | ((zoom: number) => number);
      polygonOptions?: PolylineOptions;
      singleMarkerMode?: boolean;
      disableClusteringAtZoom?: number;
      animateAddingMarkers?: boolean;
      removeOutsideVisibleBounds?: boolean;
      clusterPane?: string;
      chunkedLoading?: boolean;
      chunkInterval?: number;
      chunkDelay?: number;
      chunkProgress?: (processedMarkers: number, totalMarkers: number, elapsedTime: number) => void;
      iconCreateFunction?: (cluster: MarkerCluster) => Icon | DivIcon;
   }

  /**
   * Represents a group of markers displayed as a cluster.
   */
   interface MarkerCluster extends Layer {
      getAllChildMarkers(): Marker[];
      getChildCount(): number;
      getAllChildMarkers(): Marker[];
      zoomToBounds(options?: FitBoundsOptions): void;
   }
}

1. Save the file as "leaflet.markercluster.d.ts".
2. Include the definition file in your TypeScript project using the following import statement:

import 'leaflet.markercluster.d.ts';

1. You can now use the MarkerCluster plugin with TypeScript and benefit from code IntelliSense and error checking.