Widget:ToggleFolioNumbers

<script> (function() {

 mw.hook('wikipage.content').add(function() {
   var folios = document.querySelectorAll('span.folio-number');
   if (!folios.length) return;

   var container = document.querySelector('#Tibetan_Text .oo-ui-fieldsetLayout-group');
   if (!container) return;

   var visible = false;
   var link = document.createElement('a');
   link.href = '#';
   link.textContent = 'Show folio numbers';

   link.onclick = function(e) {
     e.preventDefault();
     visible = !visible;
     for (var i = 0; i < folios.length; i++) {
       folios[i].style.display = visible ?  : 'none';
     }
     link.textContent = visible ? 'Hide folio numbers' : 'Show folio numbers';
   };

   for (var i = 0; i < folios.length; i++) {
     folios[i].style.display = 'none';
   }

   var div = document.createElement('div');
   div.style.textAlign = 'right';
   div.appendChild(link);
   container.insertBefore(div, container.firstChild);
 });

})(); </script>