emmet-language-server

A language server for emmet.io

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Why another language server?

While aca/emmet-ls works for what I need, there were a couple of things that annoyed me from time to time and while trying to fix one of those things (aca/emmet-ls#55) I've discovered that we can leverage microsoft/vscode-emmet-helper and make a simple language server that wraps that package to provide completions.

So I decided to do that and it worked!

The most important thing is that microsoft/vscode has an excellent integration with emmet and we can have that, in all editors that implement the Language Server Protocol.

Setup

Warning

I've decided to rename the package to @olrtg/emmet-language-server for mason/lspconfig integration. Please remove the old @olrtg/emmet-ls package and migrate to this new one.

Using npm:

npm i -g @olrtg/emmet-language-server

Using mason.nvim:

:MasonInstall emmet-language-server

Neovim

With nvim-lspconfig:

Remember that if you don't need to support a new filetype or change the default settings of the language server you don't need to pass a table to the setup function (like this: lspconfig.emmet_language_server.setup().

lspconfig.emmet_language_server.setup({
  filetypes = { "css", "eruby", "html", "javascript", "javascriptreact", "less", "sass", "scss", "svelte", "pug", "typescriptreact", "vue" },
  init_options = {
    --- @type table<string, any> https://docs.emmet.io/customization/preferences/
    preferences = {},
    --- @type "always" | "never" defaults to `"always"`
    showexpandedabbreviation = "always",
    --- @type boolean defaults to `true`
    showabbreviationsuggestions = true,
    --- @type boolean defaults to `false`
    showsuggestionsassnippets = false,
    --- @type table<string, any> https://docs.emmet.io/customization/syntax-profiles/
    syntaxprofiles = {},
    --- @type table<string, string> https://docs.emmet.io/customization/snippets/#variables
    variables = {},
    --- @type string[]
    excludelanguages = {},
  },
})

Without nvim-lspconfig:

vim.api.nvim_create_autocmd({ "FileType" }, {
  pattern = "astro,css,eruby,html,htmldjango,javascriptreact,less,pug,sass,scss,svelte,typescriptreact,vue",
  callback = function()
    vim.lsp.start({
      cmd = { "emmet-language-server", "--stdio" },
      root_dir = vim.fs.dirname(vim.fs.find({ ".git" }, { upward = true })[1]),
      init_options = {
        --- @type table<string, any> https://docs.emmet.io/customization/preferences/
        preferences = {},
        --- @type "always" | "never" defaults to `"always"`
        showexpandedabbreviation = "always",
        --- @type boolean defaults to `true`
        showabbreviationsuggestions = true,
        --- @type boolean defaults to `false`
        showsuggestionsassnippets = false,
        --- @type table<string, any> https://docs.emmet.io/customization/syntax-profiles/
        syntaxprofiles = {},
        --- @type table<string, string> https://docs.emmet.io/customization/snippets/#variables
        variables = {},
        --- @type string[]
        excludelanguages = {},
      },
    })
  end,
})

Credits

• @aca for the first language server (aca/emmet-ls)
• @wassimk for bringing the microsoft/vscode-emmet-helper repo to my attention in aca/emmet-ls#55
• microsoft/vscode for having such an amazing integration with emmet and the easy and open package to integrate with
• emmetio/emmet for the awesome tool