Bracket with spaces

vim-surround adds spaces inside bracket with ( [ { inputs, while vim-sandwich does not. If you like the behavior, add following recipes.

" if you have not copied default recipes
let g:sandwich#recipes = deepcopy(g:sandwich#default_recipes)

" add spaces inside bracket
let g:sandwich#recipes += [
      \   {'buns': ['{ ', ' }'], 'nesting': 1, 'match_syntax': 1, 'kind': ['add', 'replace'], 'action': ['add'], 'input': ['{']},
      \   {'buns': ['[ ', ' ]'], 'nesting': 1, 'match_syntax': 1, 'kind': ['add', 'replace'], 'action': ['add'], 'input': ['[']},
      \   {'buns': ['( ', ' )'], 'nesting': 1, 'match_syntax': 1, 'kind': ['add', 'replace'], 'action': ['add'], 'input': ['(']},
      \   {'buns': ['{\s*', '\s*}'],   'nesting': 1, 'regex': 1, 'match_syntax': 1, 'kind': ['delete', 'replace', 'textobj'], 'action': ['delete'], 'input': ['{']},
      \   {'buns': ['\[\s*', '\s*\]'], 'nesting': 1, 'regex': 1, 'match_syntax': 1, 'kind': ['delete', 'replace', 'textobj'], 'action': ['delete'], 'input': ['[']},
      \   {'buns': ['(\s*', '\s*)'],   'nesting': 1, 'regex': 1, 'match_syntax': 1, 'kind': ['delete', 'replace', 'textobj'], 'action': ['delete'], 'input': ['(']},
      \ ]

---

If you are using surround.vim keymap macro, write the additional recipes after the runtime command.

runtime macros/sandwich/keymap/surround.vim
let g:sandwich#recipes += [
      \   {'buns': ['{ ', ' }'], 'nesting': 1, 'match_syntax': 1, 'kind': ['add', 'replace'], 'action': ['add'], 'input': ['{']},
      \   {'buns': ['[ ', ' ]'], 'nesting': 1, 'match_syntax': 1, 'kind': ['add', 'replace'], 'action': ['add'], 'input': ['[']},
      \   {'buns': ['( ', ' )'], 'nesting': 1, 'match_syntax': 1, 'kind': ['add', 'replace'], 'action': ['add'], 'input': ['(']},
      \   {'buns': ['{\s*', '\s*}'],   'nesting': 1, 'regex': 1, 'match_syntax': 1, 'kind': ['delete', 'replace', 'textobj'], 'action': ['delete'], 'input': ['{']},
      \   {'buns': ['\[\s*', '\s*\]'], 'nesting': 1, 'regex': 1, 'match_syntax': 1, 'kind': ['delete', 'replace', 'textobj'], 'action': ['delete'], 'input': ['[']},
      \   {'buns': ['(\s*', '\s*)'],   'nesting': 1, 'regex': 1, 'match_syntax': 1, 'kind': ['delete', 'replace', 'textobj'], 'action': ['delete'], 'input': ['(']},
      \ ]

Using packer in lua: (from @smjonas in Issue #115)

use {
      'machakann/vim-sandwich',
      config = function()
        -- Use vim surround-like keybindings
        vim.cmd('runtime macros/sandwich/keymap/surround.vim')
        -- '{' will insert space, '}' will not
        vim.g['sandwich#recipes'] = vim.list_extend(vim.g['sandwich#recipes'], {
          { buns = { '{ ', ' }' }, nesting = 1, match_syntax = 1, kind = { 'add', 'replace' }, action = { 'add' }, input = { '{' } },
          { buns = { '[ ', ' ]' }, nesting = 1, match_syntax = 1, kind = { 'add', 'replace' }, action = { 'add' }, input = { '[' } },
          { buns = { '( ', ' )' }, nesting = 1, match_syntax = 1, kind = { 'add', 'replace' }, action = { 'add' }, input = { '(' } },
          { buns = { '{\\s*', '\\s*}' },     nesting = 1, regex = 1, match_syntax = 1, kind = { 'delete', 'replace', 'textobj' }, action = { 'delete' }, input = { '{' } },
          { buns = { '\\[\\s*', '\\s*\\]' }, nesting = 1, regex = 1, match_syntax = 1, kind = { 'delete', 'replace', 'textobj' }, action = { 'delete' }, input = { '[' } },
          { buns = { '(\\s*', '\\s*)' },     nesting = 1, regex = 1, match_syntax = 1, kind = { 'delete', 'replace', 'textobj' }, action = { 'delete' }, input = { '(' } }
        })
      end
    }

See also Introduce vim-surround keymappings.