console.log 测试版

client/src/index.html

@@ -4,7 +4,7 @@
   <meta charset="utf-8" />
   <meta http-equiv="X-UA-Compatible" content="IE=edge">
   <meta content="origin" name="referrer">
-  <meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate" /> -->
+  <meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate" />
   <meta http-equiv="Pragma" content="no-cache" />
   <meta http-equiv="Expires" content="0" />
   <title>在线学习系统</title>