🧩 Tailwind LSP Bridge for Dart

Bring TailwindCSS class autocomplete into Dart files—using regex-based LSP forwarding.

This project sets up a dual LSP configuration in Neovim that:

• Parses Dart files
• Matches class: "..." or similar strings using regex including string arrays
• Forwards those matches to the TailwindCSS LSP
• Returns real-time autocomplete inside strings and inline css implementation

🧠 Why?

Tailwind autocomplete doesn't work inside Dart files out of the box. But what if your UI is dynamically generating class names? This bridge gives you Tailwind IntelliSense anywhere—without rewriting your toolchain.

🚀 Demo

Shown: Dart file with Tailwind class autocomplete from the Tailwind LSP

🔧 How it works

1. Dart file is parsed by the Dart LSP (for normal completions)
2. Regex finds potential Tailwind class strings (like class: "btn btn-primary")
3. Tailwind LSP is triggered manually or auto-forwarded just for that string
4. Completion items are shown right inside Dart files, from the Tailwind LSP

This is made possible by Neovim's flexible LSP architecture and a custom Lua config.

⚙️ Prerequisites

• Neovim >=0.8
• nvim-lspconfig
• Tailwind LSP
• Dart SDK + Dart LSP
• Lua-based regex match logic (included)
• tailwind.config.js in root of project directory

🛠️ Manual Setup

-- inside your LSP config
  require('lspconfig').tailwindcss.setup {
        capabilities = capabilities, -- Use shared capabilities
        -- on_attach is handled by the LspAttach autocommand group
        filetypes = {
          'dart',
          'html',
          'css',
          'javascript',
          'typescript',
          'javascriptreact',
          'typescriptreact',
          'vue',
          'svelte',
          'rust',
          'elixir',
          'heex',
          'astro',
          'glimmer',
          'handlebars',
          'php',
          'erb',
        }, -- Include dart and others
        root_dir = require('lspconfig').util.root_pattern('tailwind.config.js', 'tailwind.config.cjs', 'tailwind.config.ts', 'package.json', 'pubspec.yaml'),
        settings = {
          tailwindCSS = {
            includeLanguages = { dart = 'html' },
            classAttributes = { 'class', 'className', 'style' },
            experimental = {
              classRegex = {
                '[cC]lass[es]?.*\\s*[:=]\\s*[\'"]([^\'"]*)[\'"]',
                {
                  '.*[cC]lass[es]?.*\\s*[:=]\\s*\\[([^\\]]*)\\]\\s*',
                  '[\'"]([^\'"]+)[\'"]',
                },
              },
            },
            validate = true,
          },
        },
      }
    end, -- End of lspconfig config function
  },