Shortcut to open definition of variable in a vertical split with Neovim mapping

Question

This is a follow up question to this post where I would jump to the definition of a variable in a vertical split for ctags. I’m currently using an lsp language server like so:

  local bufopts = { noremap=true, silent=true, buffer=bufnr }
  local servers = { 'tsserver', 'eslint', 'bashls','jsonls' } 
  for _, lsp in ipairs(servers) do
      lspconfig[lsp].setup {
          ..
          on_attach = function(client, bufnr)
            vim.keymap.set('n', 'gd', vim.lsp.buf.definition, bufopts)
          end
      }
  end

How can I set up the keymap so that I can jump to the definition in a vertical split here?

update

What I’m really asking here is how to combine vim commands with this vim.lsp.buf.definition

so by going over the docs and trying to implement one of the answers, I did this

on_attach = function(client, bufnr)        
  vim.keymap.set('n', 'gv', function() 
    vsplit vim.lsp.buf.definition
  end , bufopts)

but that didn’t work.

Answer 1

I would do:

vsplit
lua vim.lsp.buf.definition()

on_attach = function(client, bufnr)        
  vim.keymap.set('n', 'gv', function() 
    vim.cmd([[
vsplit
]]
    vim.lsp.buf.definition()
  end, bufopts)