By default Vim unloads a buffer from memory when you load another buffer. This is why if you try and edit another file when you have unsaved changes it prompts you to save them. This unloading also throws away undo history which is annoying.
Make vim hide buffers rather than closing them with
This is a plugin that makes working with multiple buffers easier. You can delete buffers whilst keeping their window open (useful when you’re using split windows).
It’ll still close your window when you close the last buffer in the list though. Change this with:
This introduces a scratch buffer, an ephemeral buffer that’s not associated with a file where you can dump notes and stuff. It will get thrown away when Vim is closed.
Now when you kill the last buffer you will always just switch to the scratch buffer instead of exiting vim.
by double tapping
noremap ,, <c-^>