(function nojs () {
    'use strict';

    var docEl = document.documentElement;
    var classRE = new RegExp('(^|\\s)no-js(\\s|$)');
    var className = docEl.className;

    docEl.className = className.replace(classRE, '$1js$2');
})();

@@ -13,12 +13,16 @@
 js (
+html
 ) %7B%0A
-
     
@@ -44,199 +44,92 @@
     
-var docEl = document.documentElement;%0A    var classRE = new RegExp('(%5E%7C%5C%5Cs)no-js(%5C%5Cs%7C$)');%0A    var className = docEl.className;%0A%0A    docEl.className = className.replace(classRE, '$1js$2');%0A%7D)(
+html.className = html.className.replace(/%5Cbno-js%5Cb/, '');%0A%7D)(document.documentElement
 );%0A

Update no-js-class.js.