Merge PR QuantStack#15: Add null-check for getContainer() combined with remove() approach

Author: dfguerrerom

src/index.js

@@ -95,7 +95,10 @@ L.Control.SplitMap = L.Control.extend({
     }
     this._leftLayers.forEach((left_layer)=> {
         if (left_layer.getContainer) {
-          left_layer.getContainer().remove()
+          const container = left_layer.getContainer()
+          if (container) {
+            container.remove()
+          }
         }
         else {
             left_layer.getPane().remove()
@@ -104,7 +107,10 @@ L.Control.SplitMap = L.Control.extend({
 
     this._rightLayers.forEach((right_layer)=>{
         if (right_layer.getContainer) {
-            right_layer.getContainer().remove()
+          const container = right_layer.getContainer()
+          if (container) {
+            container.remove()
+          }
         }
         else {
             right_layer.getPane().remove()
@@ -113,9 +119,6 @@ L.Control.SplitMap = L.Control.extend({
     this._removeEvents()
     L.DomUtil.remove(this._container)
     this._map = null
-
-    // print the layers
-
     return this
   },