check &syntax instead of &filetype

Author: ap

after/syntax/javascript.vim

@@ -6,7 +6,7 @@
 " so until it has specific support there's no point in loading anyway
 " and for some reason the W3C syntax color keywords break its highlighting
 " (this refers to the https://github.com/kchmck/vim-coffee-script plugin)
-if -1 < index( split( &filetype, '[.]' ), 'coffee' ) | finish | endif
+if &syntax =~# '\(^\|\.\)coffee\($\|\.\)' | finish | endif
 
 " javaScriptX = default Vim syntax, jsX = https://github.com/pangloss/vim-javascript
 call css_color#init('hex', 'extended'