Prevent unhandled errors when the component redraws after unmounting

lib/HeatmapLayer.js

@@ -306,6 +306,12 @@ exports.default = (0, _reactLeaflet.withLeaflet)((_temp = _class = function (_Ma
   };
 
   HeatmapLayer.prototype.redraw = function redraw() {
+    // It's possible that the map has unmounted while we've waited for an animation frame, so we
+    // need to check that it still exists before proceeding with the redraw.
+    if (!this.props.leaflet.map._mapPane) {
+      return;
+    }
+
     var r = this._heatmap._r;
     var size = this.props.leaflet.map.getSize();
 

package.json

@@ -1,6 +1,6 @@
 {
   "name": "react-leaflet-heatmap-layer",
-  "version": "2.0.0",
+  "version": "2.0.1",
   "description": "A custom layer for heatmaps in react-leaflet",
   "main": "lib/HeatmapLayer.js",
   "scripts": {

src/HeatmapLayer.js

@@ -294,6 +294,12 @@ export default withLeaflet(class HeatmapLayer extends MapLayer {
   }
 
   redraw(): void {
+    // It's possible that the map has unmounted while we've waited for an animation frame, so we
+    // need to check that it still exists before proceeding with the redraw.
+    if (!this.props.leaflet.map._mapPane) {
+      return;
+    }
+
     const r = this._heatmap._r;
     const size = this.props.leaflet.map.getSize();