detect parent section of anchor even section has role

Author: mojavelinux

preview-src/index.adoc

@@ -125,6 +125,7 @@ Altera atomorum his ex, has cu elitr melius propriae.
 Eos suscipit scaevola at.
 ****
 
+[.rolename]
 === Liber recusabo
 
 No sea, at invenire voluptaria mnesarchum has.

src/js/01-nav.js

@@ -1,7 +1,7 @@
 ;(function () {
   'use strict'
 
-  var SECT_CLASS_RX = /^sect(\d)$/
+  var SECT_CLASS_RX = /^sect[0-5](?=$| )/
 
   var navContainer = document.querySelector('.nav-container')
   var navToggle = document.querySelector('.nav-toggle')