nixvim docs

plugins.nvim-surround.settings.surrounds.<name>.change

An attribute set with two keys: target and replacement.

Type: null or (submodule)

Default: null

plugins.nvim-surround.settings.surrounds.change.replacement

A function that returns the surrounding pair to replace the target selections.

Type: raw lua code

Example:

{
  __raw = ''
    function()
        local result = M.get_input("Enter the function name: ")
        if result then
            return { { result }, { "" } }
        end
    end
  '';
}

plugins.nvim-surround.settings.surrounds.change.target

A function that returns the pair of selections to be replaced in the buffer when changing the surrounding pair. It can also be a string which is interpreted as a Lua pattern whose match groups represent the left/right delimiter pair.

Type: string or raw lua code

Example: "^<([^>]*)().-([^%/]*)()>$"