diff --git a/vim/vimrc.symlink b/vim/vimrc.symlink
index 9e57413..f737589 100644
--- a/vim/vimrc.symlink
+++ b/vim/vimrc.symlink
@@ -389,6 +389,8 @@ nnoremap <silent> <leader>u :call HtmlUnEscape()<cr>
 let g:NERDTreeQuitOnOpen=0
 " show hidden files in NERDTree
 let NERDTreeShowHidden=1
+" remove some files by extension
+let NERDTreeIgnore = ['\.js.map$']
 " Toggle NERDTree
 nmap <silent> <leader>k :NERDTreeToggle<cr>
 " expand to the path of the file in the current buffer