修改上传报错

front-vue/src/views/system/user/index.vue

@@ -1494,7 +1494,7 @@ export default {
     },
     //上传前校验
     beforeAvatarUpload(file) {
-      var testmsg = files.name.substring(files.name.lastIndexOf(".") + 1);
+      var testmsg = file.name.substring(file.name.lastIndexOf(".") + 1);
             const extension = testmsg === "jpg";
             const extension2 = testmsg === "jpeg";
             const extension3 = testmsg === "png";