This is a plugin to auto save the current buffer (if modified) when the cursor is idle.

If you are using vim-plug add this to your plugins list:

Plug 'mjkloeckner/autosave.vim'

• Enable autosave for only these filetypes

  let g:auto_save_filetypes = [ 'markdown' ]

  To see all posible filetypes see: https://vi.stackexchange.com/questions/5780/list-known-filetypes

• Enable autosave for all filetypes

  let g:auto_save_all_filetypes = 0

• The event that triggers the autosave is CursorHold and CursorHoldI (see :h CurosrHold). You can change the default wait time to trigger CursorHold with:

  set updatetime = 1000 " set updatetime to 1 second (the default is 4)

  Note that a very low value may impact Vim performance.

MIT