Chore: Handling CORS on Netlify

apps/demo/partials/layout/base.hbs

@@ -46,6 +46,19 @@
         });
         targetElement.classList.add(`theme-${theme}`);
       };
+
+      // Hide elements with hide-from-visual-tests class in Supernova component preview via postMessage
+      window.addEventListener('message', (event) => {
+          // Check if the postMessage is from the Supernova.io domain
+          if (event.origin === 'https://app.supernova.io') {
+              if (event.data.action === 'hide-from-visual-tests') {
+                  const elements = document.querySelectorAll('.hide-from-visual-tests');
+                  elements.forEach(el => {
+                      el.style.cssText = event.data.style;
+                  });
+              }
+          }
+      });
     </script>
 
     {{#> scripts}}