diff --git a/src/views/bigscreenDesigner/designer/index.vue b/src/views/bigscreenDesigner/designer/index.vue
index 152b683..fe8e4a6 100644
--- a/src/views/bigscreenDesigner/designer/index.vue
+++ b/src/views/bigscreenDesigner/designer/index.vue
@@ -408,7 +408,7 @@ export default {
     // 左侧、右侧折叠切换时，动态计算中间区的宽度
     middleWidth() {
       if(!this.setupIsShow && !this.toolIsShow){
-        return document.documentElement.clientWidth-this.widthPaddingTools;
+        return document.documentElement.clientWidth - this.widthPaddingTools;
       }
       return this.bodyWidth - this.widthLeftAndRight();
     },