fix: Tree Draggable does not work on Firefox

ElemeFE · Aug 20, 2024 · 30bd0fa · 30bd0fa
1 parent c345bb4
commit 30bd0fa
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/packages/tree/src/tree.vue b/packages/tree/src/tree.vue
@@ -447,7 +447,9 @@
       this.$on('tree-node-drag-end', (event) => {
         const { draggingNode, dropType, dropNode } = dragState;
         event.preventDefault();
-        event.dataTransfer.dropEffect = 'move';
+        if (event.dataTransfer) {
+          event.dataTransfer.dropEffect = 'move';
+        }
 
         if (draggingNode && dropNode) {
           const draggingNodeCopy = { data: draggingNode.node.data };