Syntax highlighting/support for vueify file (.vue) using mmm-mode

vueify-mmm-mode.el

(require 'mmm-mode)
(setq mmm-global-mode 'maybe)

(dolist (langsets '(("script" . ((coffee . coffee-mode)
                                 (es6    . js2-mode)))
                    ("style"  . ((stylus . stylus-mode)
                                 (less   . less-css-mode)
                                 (scss   . scss-mode)))))
  (let ((tag (car langsets)))
    (dolist (pair (cdr langsets))
      (let* ((lang       (car pair))
             (submode    (cdr pair))
             (class-name (make-symbol (format "vueify-%s-%s" tag lang)))
             (front      (format "<%s lang=\"%s\">" tag lang))
             (back       (format "</%s>" tag)))
        (mmm-add-classes
         `((,class-name
            :submode ,submode
            :front ,front
            :back ,back)))
        (mmm-add-mode-ext-class nil "\\.vue?\\'" class-name)))))

(add-to-list 'auto-mode-alist '("\\.vue?\\'" . web-mode))