fix utils

Author: wxiaoguang

web_src/js/utils.js

@@ -1,13 +1,13 @@
 import {encode, decode} from 'uint8-to-base64';
 
 // transform /path/to/file.ext to file.ext
-export function basename(path = '') {
+export function basename(path) {
   const lastSlashIndex = path.lastIndexOf('/');
   return lastSlashIndex < 0 ? path : path.substring(lastSlashIndex + 1);
 }
 
 // transform /path/to/file.ext to .ext
-export function extname(path = '') {
+export function extname(path) {
   const lastSlashIndex = path.lastIndexOf('/');
   const lastPointIndex = path.lastIndexOf('.');
   if (lastSlashIndex > lastPointIndex) return '';