Feature Request - automatically close unpaired tag on '/'

[speelbarrow]

Would it possible/particularly difficult to implement behaviour that would automatically transform <component / to <component />?

(I'd try to just implement it myself but I have absolutely no experience with Treesitter :/)

Let me know if anything about this request is unclear, I'm happy to clarify!

[PriceHiller]

This should be doable depending on the language and the associated treesitter parser.

I'll look into this when I get some time and other issues I've prioritized are knocked out.

[speelbarrow]

Awesome! Thanks so much (:

[jasper-at-windswept]

I'd also love to see this!
Since in at least react you don't want a paired tag just <Tag />

[roycrippen4]

I built this feature in my own config and it works pretty well.

Here are the react-specific instructions:

1. Create a after/ftplugin directory at the top level of your config.
2. Create javascriptreact.lua, typescriptreact.lua, and javascript.lua files inside that directory.
3. Paste the snippet below into each one of those files

-- Automatically end a self-closing tag when pressing /
vim.keymap.set('i', '/', function()
  local node = vim.treesitter.get_node()
  if not node then
    return '/'
  end

  if node:type() == 'jsx_opening_element' then
    local char_after_cursor = vim.fn.strcharpart(vim.fn.strpart(vim.fn.getline('.'), vim.fn.col('.') - 1), 0, 1) ---@type string

    if char_after_cursor == '>' then
      return '/'
    end

    local char_at_cursor = vim.fn.strcharpart(vim.fn.strpart(vim.fn.getline('.'), vim.fn.col('.') - 2), 0, 1) ---@type string
    local already_have_space = char_at_cursor == ' '

    return already_have_space and '/>' or ' />'
  end

  return '/'
end, { expr = true, buffer = true })

@PriceHiller this should be straightforward to implement if you want a PR. This strategy can be used in other file-types as long as the correct node type is known. The code is identical in svelte files, except you match for the 'element' node.

[PriceHiller]

@roycrippen4 if you open a PR to me, I'll gladly merge it (preferably with tests, but it's ok if none are written 🙂 ).

Should be gated beind the enable_close_on_slash configuration option.

[jasper-at-windswept]

Thanks all for the great work on this!

[roycrippen4]

I'm digging into the solution now, but I need to ensure it's more robust than the snippets I provided above. It's one thing to add stuff that's close enough in your own config; it's a completely different ball game integrating it into a plugin and not breaking it for everyone else.