diff --git a/src/views/doc/tools.ts b/src/views/doc/tools.ts
index 32abeae..f4775cb 100644
--- a/src/views/doc/tools.ts
+++ b/src/views/doc/tools.ts
@@ -92,14 +92,16 @@ export function readableSize(val:matterInfo){
 
 
 export function fileType(name:string){
-  const suffix=name.match(/(\.[a-zA-Z]+$)/)[0]
-  if (".doc, .docx, .html, .md, .txt, .wps, .xml".includes(suffix)){
+  const suffix=name.match(/(\.[a-zA-Z]+$)/)
+  if(suffix==null){ return ""}
+  
+  if (".doc, .docx, .html, .md, .txt, .wps, .xml".includes(suffix[0])){
     return "word"
-  } else if(".csv, .xls, .xlsb, .xlsm, .xlsx".includes(suffix)){
+  } else if(".csv, .xls, .xlsb, .xlsm, .xlsx".includes(suffix[0])){
     return "cell"
-  }else if(".ppt, .pptm, .pptx".includes(suffix)){
+  }else if(".ppt, .pptm, .pptx".includes(suffix[0])){
     return "slide "
-  }else if (suffix===".pdf"){
+  }else if (suffix[0]===".pdf"){
     return "pdf"
   }
   return ""