refactor: scope dedupe to parent container

static/dedupe.ts

@@ -1,26 +1,41 @@
-const dedupe = (): void => {
+const dedupeWithin = (root: ParentNode): void => {
   const seen = new Set<string>();
-  const elements = document.querySelectorAll("[data-id]");
+  const elements = root.querySelectorAll<HTMLElement>(":scope > [data-id]");
 
   elements.forEach((item) => {
-    const id = item.getAttribute("data-id");
+    const id = item.dataset.id;
     if (!id) {
       return;
     }
+
     if (seen.has(id)) {
-      item.remove(); // duplicate, remove it
-    } else {
-      seen.add(id);
+      item.remove();
+      return;
     }
+
+    seen.add(id);
+  });
+};
+
+const dedupe = (): void => {
+  const containers = new Set<ParentNode>();
+  const elements = document.querySelectorAll<HTMLElement>("[data-id]");
+
+  elements.forEach((item) => {
+    if (item.parentElement) {
+      containers.add(item.parentElement);
+    }
+  });
+
+  containers.forEach((container) => {
+    dedupeWithin(container);
   });
 };
 
-// run on DOM ready or immediately if already loaded
 if (document.readyState === "loading") {
   document.addEventListener("DOMContentLoaded", dedupe);
 } else {
   dedupe();
 }
 
-// also run on load as a fallback (e.g. htmx swaps)
 window.addEventListener("load", dedupe);