Fixed instant loading when used with use_directory_urls: false

material/base.html

@@ -217,7 +217,7 @@
       </script>
     {% endblock %}
     {% block scripts %}
-      <script src="{{ 'assets/javascripts/bundle.8c3a7438.min.js' | url }}"></script>
+      <script src="{{ 'assets/javascripts/bundle.d1d4d62b.min.js' | url }}"></script>
       {% for path in config["extra_javascript"] %}
         <script src="{{ path | url }}"></script>
       {% endfor %}

src/assets/javascripts/integrations/instant/index.ts

@@ -104,15 +104,17 @@ function preprocess(urls: string[]): string[] {
   if (urls.length < 2)
     return urls
 
-  /* Compute references URLs */
+  /* Take the first two URLs and remove everything after the last slash */
-  const [root, next] = urls.sort((a, b) => a.length - b.length)
+  const [root, next] = urls.slice(0, 2).map(url => (
+    url.replace(/[^/]+$/, "")
+  ))
 
   /* Compute common prefix */
   let index = 0
   if (root === next)
     index = root.length
   else
-    while (root.charCodeAt(index) === root.charCodeAt(index))
+    while (root.charCodeAt(index) === next.charCodeAt(index))
       index++
 
   /* Replace common prefix (i.e. base) with effective base */