How to get the filetype in lua in nvim

Question

How to get the current file type in lua with neovim? I tried following but all of them returns nil.

print(vim.g.filetype)
print(vim.b.filetype)
print(vim.w.filetype)
print(vim.t.filetype)
print(vim.v.filetype)

Answer 1

filetype is a buffer-local option, so you can access it with:

vim.bo.filetype

From :h lua-vim-options:

From Lua you can work with editor |options| by reading and setting items in
these Lua tables:

vim.w
   ...

vim.bo                                                  *vim.bo*
       Get or set buffer-scoped |local-options|. Invalid key is an error.
       Example:
           vim.bo.buflisted = true
           print(vim.bo.comments)

vim.wo
   ...