Svelte tree-sitter mode

An Emacs tree-sitter major mode for .svelte files.

It requires

• Emacs (>= emacs-major-version 29) with tree-sitter support.

Upstream grammars:

• tree-sitter-svelte: mandatory
• tree-sitter-typescript: optional
• tree-sitter-javascript: optional
• tree-sitter-css: optional

Example language-source-alist for treesit-language-source-alist can be found in svelte-ts-mode-language-source-alist constant in svelte-ts-mode.el

You can use command M-x treesit-install-language-grammar to install these grammars once you have configured them in your treesit-language-source-alist.

Installation

[!CAUTION] Still in early development.

• MELPA

  Not ready yet.

• Elpaca

  (use-package svelte-ts-mode
    :ensure (:host github :repo "leafOfTree/svelte-ts-mode"))
  

• Manually

  git clone https://github.com/leafOfTree/svelte-ts-mode --depth 1
  

  ; ~/.emacs
  (add-to-list 'load-path "/path/to/svelte-ts-mode")
  (require 'svelte-ts-mode)
  

  For Spacemacs, put them inside dotspacemacs/user-config.

  ; ~/.spacemacs
  (defun dotspacemacs/user-config ()
        
  (add-to-list 'load-path "/path/to/svelte-ts-mode")
  (require 'svelte-ts-mode)
  

Example Configuration

(use-package svelte-ts-mode
  :after eglot
  :ensure (:host github :repo "leafOfTree/svelte-ts-mode")
  :config
  (add-to-list 'eglot-server-programs '(svelte-ts-mode . ("svelteserver" "--stdio"))))

Tips

Set project-wide indentation offset for different languages

Create .dir-locals.el at the project root directory, and write content like the following into it:

;;; Directory Local Variables         -*- no-byte-compile: t; -*-
;;; For more information see (info "(emacs) Directory Variables")

((nil . ((typescript-ts-mode-indent-offset . 4)
         (js-indent-level . 4)
         (css-indent-offset . 4)
         (svelte-ts-mode-indent-offset . 2))))

This ensures indentation for a specific language(e.g. typescript) between its major mode and svelte-ts-mode are the same.

Credits

Inspired by mhtml-ts-mode