feat: markmap function is ready

web/src/views/ImageSd.vue

@@ -576,24 +576,26 @@ const connect = () => {
   });
 
   _socket.addEventListener('close', () => {
-    ElMessageBox.confirm(
-        '检测到您已经在其他客户端创建了新的连接，当前连接将被关闭！',
-        '提示',
-        {
-          dangerouslyUseHTMLString: true,
-          confirmButtonText: '重新连接',
-          cancelButtonText: '关闭',
-          type: 'warning',
-        }
-    ).then(() => {
-      connect()
-    }).catch(() => {
-      ElMessage({
-        type: 'info',
-        message: '连接已关闭',
+    if (socket.value !== null) {
+      ElMessageBox.confirm(
+          '检测到您已经在其他客户端创建了新的连接，当前连接将被关闭！',
+          '提示',
+          {
+            dangerouslyUseHTMLString: true,
+            confirmButtonText: '重新连接',
+            cancelButtonText: '关闭',
+            type: 'warning',
+          }
+      ).then(() => {
+        connect()
+      }).catch(() => {
+        ElMessage({
+          type: 'info',
+          message: '连接已关闭',
+        })
       })
-    })
-  });
+    }
+  })
 }
 
 const clipboard = ref(null)