remove layer references from layergroup when they are removed. Fixes #452 (patch)

Author: codeofsumit

cypress/integration/layergroup.spec.js

@@ -41,4 +41,17 @@ describe('Edit LayerGroup', () => {
     });
     cy.hasVertexMarkers(0);
   });
+
+  it('supports clearLayers', () => {
+
+    cy.window().then(({ L, map }) => {
+      const featureGroup = new L.FeatureGroup();
+      featureGroup.addTo(map)
+      featureGroup.addLayer(new L.Marker([19.04469, 72.9258]));
+      map.fitBounds(featureGroup.getBounds())
+      featureGroup.clearLayers();
+
+      expect(featureGroup.pm._layers).to.have.lengthOf(0);
+    });
+  })
 });

src/js/Edit/L.PM.Edit.LayerGroup.js

@@ -30,6 +30,15 @@ Edit.LayerGroup = L.Class.extend({
         this.enable(this.getOptions());
       }
     });
+
+    // if a layer is removed from the group, calc the layers list again
+    this._layerGroup.on('layerremove', e => {
+      if (e.target._pmTempLayer) {
+        return;
+      }
+
+      this._layers = this.findLayers();
+    })
   },
   findLayers() {
     // get all layers of the layer group