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VimL

"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" Vim syntax file
"
" Language: JSX (JavaScript)
" Maintainer: Max Wang <mxawng@gmail.com>
" Depends: pangloss/vim-javascript
"
" CREDITS: Inspired by Facebook.
"
"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
" Prologue; load in XML syntax.
if exists('b:current_syntax')
let s:current_syntax=b:current_syntax
unlet b:current_syntax
endif
syn include @XMLSyntax syntax/xml.vim
if exists('s:current_syntax')
let b:current_syntax=s:current_syntax
endif
" Officially, vim-jsx depends on the pangloss/vim-javascript syntax package
" (and is tested against it exclusively). However, in practice, we make some
" effort towards compatibility with other packages.
"
" These are the plugin-to-syntax-element correspondences:
"
" - pangloss/vim-javascript: jsBlock, jsExpression
" - jelera/vim-javascript-syntax: javascriptBlock
" - othree/yajs.vim: javascriptNoReserved
" JSX attributes should color as JS. Note the trivial end pattern; we let
" jsBlock take care of ending the region.
syn region xmlString contained start=+{+ end=++ contains=jsBlock,javascriptBlock
" JSX child blocks behave just like JSX attributes, except that (a) they are
" syntactically distinct, and (b) they need the syn-extend argument, or else
" nested XML end-tag patterns may end the outer jsxRegion.
syn region jsxChild contained start=+{+ end=++ contains=jsBlock,javascriptBlock
\ extend
" Highlight JSX regions as XML; recursively match.
"
" Note that we prohibit JSX tags from having a < or word character immediately
" preceding it, to avoid conflicts with, respectively, the left shift operator
" and generic Flow type annotations (http://flowtype.org/).
syn region jsxRegion
\ contains=@Spell,@XMLSyntax,jsxRegion,jsxChild,jsBlock,javascriptBlock
\ start=+\%(<\|\w\)\@<!<\z([a-zA-Z][a-zA-Z0-9:\-.]*\>[:,]\@!\)\([^>]*>(\)\@!+
\ skip=+<!--\_.\{-}-->+
\ end=+</\z1\_\s\{-}>+
\ end=+/>+
\ keepend
\ extend
" Add jsxRegion to the lowest-level JS syntax cluster.
syn cluster jsExpression add=jsxRegion
" Allow jsxRegion to contain reserved words.
syn cluster javascriptNoReserved add=jsxRegion