vim-vue-plugin

Vim syntax and indent plugin for .vue files. Mainly inspired by mxw/vim-jsx

Installation

You could install it just like other plugins. The filetype will be set to vue. Feel free to open an issue or a pull request if any questions

How it works

It loads multiple syntax and indent files for .vue and enables them to work together

• Blocks (both template/script/style and custom blocks) with any specified syntax, including pug, typescript, coffee, scss, sass, less, stylus, .... Syntax plugins need to be installed if not provided by Vim
• Attribute, directive, and keyword highlight
• emmet-vim html, javascript, css, ... filetype detection
• Context-based behavior, such as to get current tag or syntax, and set local options like commentstring
• A built-in foldexpr foldmethod

Configuration

g:vim_vue_plugin_config is the only configuration. You can copy its default value below as a starting point

let g:vim_vue_plugin_config = { 
      \'syntax': {
      \   'template': ['html'],
      \   'script': ['javascript'],
      \   'style': ['css'],
      \},
      \'full_syntax': [],
      \'initial_indent': [],
      \'attribute': 0,
      \'keyword': 0,
      \'foldexpr': 0,
      \'debug': 0,
      \}

Description

It has the following options

• syntax
  • key: string. Block tag name
  • value: string list. Block syntax
    • lang="..." on block tag decides the effective syntax
    • When no valid lang="..." is present, the first syntax in the list will be used.
    • By default, only syntax files from ['$VIMRUNTIME', '$VIM/vimfiles', '$HOME/.vim'] are loaded. If none is found, then full syntax files, including those from plugins, will be loaded
• full_syntax: string list. Syntax whose full syntax files will always be loaded
• initial_indent: string list. Tag/syntax with initial one tab indent. The format can be tag.syntax, tag, or syntax

For boolean options below, set 1 to enable or 0 to disable

• attribute: boolean. Highlight attribute as expression instead of string
• keyword : boolean. Highlight keyword such as data, methods, ...
• foldexpr: boolean. Enable built-in foldexpr foldmethod
• debug: boolean. Echo debug messages in messages list

Example

Only for demo. Try to set syntax as little as possible for performance.

let g:vim_vue_plugin_config = { 
      \'syntax': {
      \   'template': ['html', 'pug'],
      \   'script': ['javascript', 'typescript', 'coffee'],
      \   'style': ['css', 'scss', 'sass', 'less', 'stylus'],
      \   'i18n': ['json', 'yaml'],
      \   'route': 'json',
      \},
      \'full_syntax': ['json'],
      \'initial_indent': ['i18n', 'i18n.json', 'yaml'],
      \'attribute': 1,
      \'keyword': 1,
      \'foldexpr': 1,
      \'debug': 0,
      \}

You can still change options later as if they are global variables.

let g:vim_vue_plugin_config.foldexpr = 0

Note

• typescript matches lang="ts"
• list options can be string if only one
• The first item of syntax list will be used if no "lang=..."
• For .wpy, initial_indent defaults to ['script', 'style']
• You could check :h dict and :h list for details about the complex data types

Context-based behavior

There are more than one language in .vue file. Different mappings, completions, and local options may be required under different tags or syntax (current language filetype)

This plugin provides functions to get the tag/syntax where the cursor is in

• GetVueTag() => String Return value is one of 'template', 'script', 'style'

  " Example
  autocmd FileType vue inoremap <buffer><expr> : InsertColon()
  
  function! InsertColon()
    let tag = GetVueTag()
    return tag == 'template' ? ':' : ': '
  endfunction

• GetVueSyntax() => String Return value is one of 'html', 'javascript', 'css', 'scss', ...

• OnChangeVueSyntax(syntax) An event listener that is called when syntax changes

  You can define it in your vimrc to set local options based on current syntax

  " Example: set local options based on syntax
  function! OnChangeVueSyntax(syntax)
    echom 'Syntax is '.a:syntax
    if a:syntax == 'html'
      setlocal commentstring=<!--%s-->
      setlocal comments=s:<!--,m:\ \ \ \ ,e:-->
    elseif a:syntax =~ 'css'
      setlocal comments=s1:/*,mb:*,ex:*/ commentstring&
    else
      setlocal commentstring=//%s
      setlocal comments=sO:*\ -,mO:*\ \ ,exO:*/,s1:/*,mb:*,ex:*/,://
    endif
  endfunction

It has been renamed to GetVueSyntax, OnChangeVueSyntax from GetVueSubtype, OnChangeVueSubtype for consistency

emmet-vim

Currently emmet-vim works regarding your html, javascript, css, ... emmet settings, but it depends on how emmet-vim gets filetype and may change in the future. Feel free to report an issue if any problem appears

For sass using emmet-vim, please check out this issue

Avoid overload

Since there are many sub-languages included, most delays come from syntax files overload. A variable named b:current_loading_main_syntax is set to vue which can be used as a loading condition if you'd like to manually find and modify the syntax files causing overload

For example, the built-in syntax sass.vim and less.vim in vim8.1 runtime and pug.vim in vim-pug/syntax always load css.vim which this plugin already loads. It can be optimized like

$VIMRUNTIME/syntax/sass.vim

- runtime! syntax/css.vim
+ if !exists("b:current_loading_main_syntax")
+   runtime! syntax/css.vim
+ endif

$VIMRUNTIME/syntax/vue.vim

-   runtime! syntax/html.vim
+ if !exists("b:current_loading_main_syntax")
+   runtime! syntax/html.vim
+ endif

Acknowledgments & Refs

• mxw/vim-jsx

• Single File Components

See also

• vim-svelte-plugin

  Svelte is a compilation web framework that shares a similar syntax to Vue

License

This plugin is under The Unlicense. Other than this, lib/indent/* files are extracted from vim runtime