Add Nuxt

app/assets/loading/loading.js

@@ -0,0 +1,13 @@
+document.addEventListener("DOMContentLoaded", function() {
+    var iframes = document.querySelectorAll("iframe");
+
+    iframes.forEach(function(iframe) {
+        var loader = iframe.parentElement.querySelector(".loader");
+        loader.classList.add("active");
+        iframe.addEventListener("load", function() {
+            loader.classList.remove("active");
+            iframe.classList.add("loaded");
+        });
+    });
+    
+});