diff --git a/src/components/FancyTree/index.vue b/src/components/FancyTree/index.vue
index 29a62f5..a294b3e 100644
--- a/src/components/FancyTree/index.vue
+++ b/src/components/FancyTree/index.vue
@@ -458,18 +458,20 @@
         if(file.isFolder){
           return 'folder'
         }
-        if(file.contentType.indexOf('video') > -1){
-          return 'video'
-        }
-        if(file.contentType.startsWith('image')){
-          return 'image'
-        }
-        if(file.contentType.indexOf('audio') > -1){
-          return 'audio'
+        if (file.contentType) {
+          if(file.contentType.indexOf('video') > -1){
+            return 'video'
+          }
+          if(file.contentType.startsWith('image')){
+            return 'image'
+          }
+          if(file.contentType.indexOf('audio') > -1){
+            return 'audio'
+          }
         }
         let suffix = file.suffix;
         if(!suffix && file.name){
-          suffix = file.name.substring(file.name.lastIndexOf('.') + 1);
+          suffix = file.name.substring(file.name.lastIndexOf('.') + 1)
         }
         if(iconClass.has(suffix)){
           return iconClass.get(suffix)