add prettier as ALE

nvim/.config/nvim/init.vim

@@ -30,7 +30,12 @@ let g:ale_lint_on_save                = 1
 let g:ale_fix_on_save                 = 1
 let g:ale_sign_column_always = 1
 let g:airline#extensions#ale#enabled = 1
-
+let g:ale_fixers = {
+\   '*': ['remove_trailing_lines', 'trim_whitespace'],
+\   'javascript': ['prettier'],
+\   'markdown': ['prettier'],
+\   'yaml': ['prettier'],
+\}
 inoremap jk <esc>
 inoremap kj <esc>
 set ignorecase