feat: Changes in xblock_v2 to support studio_view [FC-0076]

common/templates/xblock_v2/xblock_iframe.html

@@ -215,6 +215,13 @@
                 }
                 return url;
             },
+            notify: () => {
+              /** 
+               * Used in `studio_view`
+               * 
+               * TODO: Do nothing for now
+               *  **/
+            }
         };
 
         /**
@@ -322,5 +329,16 @@
 
     window.addEventListener('load', blockFrameJS);
   </script>
+  <script>
+    // Used when rendering the `studio_view`, in order to intercept and handle the cancel button event
+    document.querySelector('.cancel-button').addEventListener('click', function() {
+      event.preventDefault();
+      window.parent.postMessage('cancel-clicked', '*');
+    });
+    document.querySelector('.save-button').addEventListener('click', function() {
+      event.preventDefault();
+      window.parent.postMessage('save-clicked', '*');
+    });
+  </script>
 </body>
 </html>