Autoindent isn't automatically applied when creating a new line using Lua API

[anthony-S93]

I have a custom keymap that allows me to use the o command in NORMAL mode while inside INSERT mode:

vim.keymap.set("i", "<C-j>", function() vim.cmd(":normal o") end, opts)

The problem is that I can't figure out how to also trigger the autoindent feature when I use the custom keymap:

no-autoindent.mp4

When using o from NORMAL mode:

autoindent.mp4

[zeertzjq]

You can use this:

vim.keymap.set("i", "<C-J>", "<C-O>o", opts)

[anthony-S93]

This worked. Thanks. But why didn't vim.cmd() work?

[zeertzjq]

See the documentation for :normal:

			{commands} should be a complete command.  If
			{commands} does not finish a command, the last one
			will be aborted as if <Esc> or <C-C> was typed.
			This implies that an insert command must be completed