diff --git a/static/js/comic-nav.js b/static/js/comic-nav.js
index c412a00..6ea9675 100644
--- a/static/js/comic-nav.js
+++ b/static/js/comic-nav.js
@@ -27,6 +27,14 @@
 
     // Update the page with comic data
     function displayComic(comic) {
+        // Update container class for full-width option
+        const container = document.querySelector('.comic-container');
+        if (comic.full_width) {
+            container.classList.add('comic-container-fullwidth');
+        } else {
+            container.classList.remove('comic-container-fullwidth');
+        }
+
         // Update title
         const title = comic.title || `#${comic.number}`;
         document.querySelector('.comic-header h1').textContent = title;