fixed typo and added documentation

templates/standalone/modal.julius

@@ -47,11 +47,17 @@
     };
 
     function setup() {
+      // every modal can be openend via document-wide event, see openOnEvent
       document.addEventListener('modal-open', openOnEvent, false);
+      // if modal has trigger assigned to it open modal on click
       if (trigger) {
         trigger.classList.add('modal__trigger');
         trigger.addEventListener('click', open, false);
       }
+      // if there is no content specified for the modal we assume that
+      // the content is supposed to be the page the trigger links to.
+      // so we check if the trigger has a href-attribute, fetch that page
+      // and replace the modal content with the response
       var replaceMe = modal.querySelector('.replace-me');
       var replaceWith = trigger ? trigger.getAttribute('href') : '';
       if (replaceMe) {
@@ -68,17 +74,18 @@
               replaceMe.innerText = '';
               replaceMe.insertBefore(main, null);
             } else {
-              replaceMe.innerhTML = body;
+              replaceMe.innerHTML = body;
             }
           });
-
         }
       }
+      // tell further modals, that this one already got initialized
       modal.classList.add('js-modal-initialized');
     }
     setup();
   };
 
+  // make sure document doesn't scroll when modal is active
   function toggleScroll(scrollable) {
     document.body.classList.toggle('no-scroll', !scrollable);
   }