adventskalender/2025/index.html aktualisiert

adventskalender/2025/index.html

@@ -51,7 +51,20 @@
   >
   <img 
     src="assets/images/1920/jpeg/Basisbild.jpg"
+    srcset="
+      assets/images/420/jpeg/Basisbild.jpg 420w,
+      assets/images/768/jpeg/Basisbild.jpg 768w,
+      assets/images/1024/jpeg/Basisbild.jpg 1024w,
+      assets/images/1280/jpeg/Basisbild.jpg 1280w,
+      assets/images/1600/jpeg/Basisbild.jpg 1600w,
+      assets/images/1920/jpeg/Basisbild.jpg 1920w,
+      assets/images/2560/jpeg/Basisbild.jpg 2560w,
+      assets/images/3840/jpeg/Basisbild.jpg 3840w
+    "
+    sizes="100vw"
     alt="Bratonien Adventskalender 2025"
+    decoding="async"
+    fetchpriority="high"
   >
 </picture>
     <div class="door hinge-right" data-day="18" data-left="6" data-top="9" data-width="8.5">18</div>