modify

@@ -186,8 +186,10 @@ export default {
       this.$nextTick(() => {
         const trEl =
           this.$refs.tableRef.$refs.bodyWrapper.children[0].children[1]
-            .children[0].clientHeight;
-        this.trHeight = trEl;
+            .children[0];
+        if (trEl) {
+          this.trHeight = trEl.clientHeight;
+        }
       });
     }, 800),
 

@@ -724,7 +724,7 @@ export default {
     },
     // 删除
     deleBtn(item, $index) {
-      console.log(item, $index);
+      console.log("删除：",item, $index);
       this.tableData.splice($index, 1);
     },
     // 类别