Toggle Light/Dark

[iton0]

I am using WezTerm, and I have set up a custom event that allows me to change the overall color scheme of the terminal. When I switch the color scheme in WezTerm and then open Neovim, it correctly adjusts the background option for Vim based on the new color scheme. However, I’ve noticed that if I run the color scheme change event while I am already inside Neovim, it does not update the background of the Neovim color scheme accordingly. Is there a way to ensure that the background changes in Neovim when I trigger the event from within it?

[maxmx03]

The easiest way to create a keymap for toggling the background in Neovim is like this:

local toggle_background = function()
  if vim.o.background == 'light' then
    vim.o.background = 'dark'
  else
    vim.o.background = 'light'
  end
end

vim.keymap.set('n', '<F2>', toggle_background)

Alternatively, you can use neovim-remote to achieve the same result:

Start Neovim with a listening socket:

nvim --listen /tmp/nvimsocket

Send commands remotely:

nvr --remote-send ':set background=light<CR>'

You can create a shell function to always open Neovim with the listening socket:

function vim {
  [[ -n "$1" ]] && nvim --listen /tmp/nvimsocket "$1" || nvim --listen /tmp/nvimsocket
}

Now, you can create a Bash script to toggle Neovim's background. For testing, you could bind a shortcut to toggle the background:

bind -x '"\C-b":toggle'

export NEOVIM_BACKGROUND=dark
function toggle {
  [[ "$NEOVIM_BACKGROUND" = 'dark' ]] && NEOVIM_BACKGROUND=light || NEOVIM_BACKGROUND=dark
  nvr --remote-send ":set background=${NEOVIM_BACKGROUND}<CR>"
}