Merge pull request #763 from d0m1n1kr/patch-1

Fix additive sorting

Author: revolist

src/plugins/sorting/sorting.plugin.ts

@@ -195,23 +195,24 @@ export class SortingPlugin extends BasePlugin {
       const sorting: SortingOrder = {};
       const sortingFunc: SortingOrderFunction = {};
 
+      if (columnProp in sorting && size(sorting) > 1 && order === undefined) {
+        delete sorting[columnProp];
+        delete sortingFunc[columnProp];
+      } else {
+        sorting[columnProp] = order;
+        sortingFunc[columnProp] = cmp;
+      }      
+
       this.sorting = {
         ...this.sorting,
         ...sorting,
       };
+      
       // extend sorting function with new sorting for multiple columns sorting
       this.sortingFunc = {
         ...this.sortingFunc,
         ...sortingFunc,
       };
-
-      if (columnProp in sorting && size(sorting) > 1 && order === undefined) {
-        delete sorting[columnProp];
-        delete sortingFunc[columnProp];
-      } else {
-        sorting[columnProp] = order;
-        sortingFunc[columnProp] = cmp;
-      }
     } else {
       if (order) {
         // reset sorting