snapshot of https://github.com/ueberdosis/tiptap.git (main, 2026-09-15; blobs > 131072B omitted)

packages/extension-unique-id/src/helpers/findDuplicates.ts

@@ -0,0 +1,17 @@
+/**
+ * Returns a list of duplicated items within an array.
+ */
+export function findDuplicates(items: any[]): any[] {
+  const seen = new Set()
+  const duplicates = new Set<any>()
+
+  items.forEach(item => {
+    if (seen.has(item)) {
+      duplicates.add(item)
+    } else {
+      seen.add(item)
+    }
+  })
+
+  return Array.from(duplicates)
+}