fixed warning

1 files changed, 1 insertions, 1 deletions

diff --git a/src/client/util/DragManager.ts b/src/client/util/DragManager.ts
index 858f67273..f5704d2bf 100644
--- a/src/client/util/DragManager.ts
+++ b/src/client/util/DragManager.ts
@@ -365,7 +365,7 @@ export namespace DragManager {
         const dragElements = eles.map(ele => {
             if (!ele.parentNode) dragDiv.appendChild(ele);
             const dragElement = ele.parentNode === dragDiv ? ele : ele.cloneNode(true) as HTMLElement;
-            let children = Array.from(dragElement.children);
+            const children = Array.from(dragElement.children);
             while (children.length) { // need to replace all the maker node reference ids with new unique ids. otherwise, the clone nodes will reference the original nodes which are all hidden during the drag
                 const next = children.pop();
                 next && children.push(...Array.from(next.children));