Notepad++ Svelte Support 🧩

Syntax highlighting + autocomplete for Svelte 5 files (.svelte) in Notepad++.

⚠️ This is a User Defined Language (UDL) — it ships as XML, not as a binary plugin. No compilation needed, works with stock Notepad++.

✨ Features

• 🎨 Syntax highlighting for Svelte markup, <script>, <style>
• 🪄 Svelte 5 runes highlighted ($state, $derived, $effect, $props, …)
• 🔁 Block syntax highlighted and folded ({#if} / {:else} / {/if}, {#each}, {#await}, {#snippet}, {#key})
• 🏷️ Special tags {@render}, {@html}, {@const}, {@debug}, {@attach}
• 🎯 Directives: bind:, on:, use:, transition:, class:, style:
• 💡 Autocomplete for Svelte runes & block syntax
• 🌗 Two themes: Dark (VSCode-like) and Light

📦 Installation

Easy way (Windows PowerShell)

git clone https://github.com/<you>/notepad-svelte-support
cd notepad-svelte-support
.\scripts\install.ps1                # Dark theme (default)
.\scripts\install.ps1 -Theme Light   # Light theme

Manual way

1. UDL (syntax highlighting):

   • Open Notepad++ → Language → User Defined Language → Define your language…
   • Click Import… and select udl/Svelte.xml (or Svelte-Light.xml)
   • Restart Notepad++

2. Autocomplete:

   • Copy autocomplete/Svelte.xml to:
     • %ProgramFiles%\Notepad++\autoCompletion\Svelte.xml
   • Enable: Settings → Preferences → Auto-Completion → ✓ Enable auto-completion on each input

3. Open a .svelte file — language should be auto-detected.

🧪 Test it

The samples/ folder contains real Svelte 5 components:

• Counter.svelte — runes, blocks, await, styles
• TodoList.svelte — bindings, each blocks, events

🗑️ Uninstall

.\scripts\uninstall.ps1

🛠️ Development

# Validate XML files
./scripts/validate.sh

🗺️ Roadmap

This project starts as a UDL. If real Svelte support needs more (like multi-language lexing of HTML+CSS+JS within one file, or context-aware autocomplete), Phase 2 will be a real C++ Notepad++ plugin. See docs/ROADMAP.md.

🤝 Contributing

Found a missing keyword? A wrong color? PRs welcome! Edit the udl/*.xml, run ./scripts/validate.sh, open PR.

📜 License

MIT — see LICENSE.

🙏 Credits

Inspired by other community Notepad++ language packs (e.g. the official userDefinedLanguages repo). Color palette inspired by VSCode Dark+ / Light+.