<100 char lines

src/core/Utils.js

@@ -64,7 +64,9 @@ function removeClass(el, className) {
   if (el.classList) {
     el.classList.remove(className);
   } else {
-    el.className = el.className.replace(new RegExp('(^|\\b)' + className.split(' ').join('|') + '(\\b|$)', 'gi'), ' ');
+    const patClasses = className.split(' ').join('|');
+    const pattern    = new RegExp('(^|\\b)' + patClasses + '(\\b|$)', 'gi');
+    el.className     = el.className.replace(pat, ' ');
   }
 }