1 files changed, 37 insertions, 0 deletions
diff --git a/docs/components/Tabs.tsx b/docs/components/Tabs.tsx
new file mode 100644
index 0000000..f75019a
--- /dev/null
+++ b/docs/components/Tabs.tsx
@@ -0,0 +1,37 @@
+import type { FC, ReactElement } from "react";
+
+import { Tabs as NextraTabs, Tab } from "nextra-theme-docs";
+import useSWR from "swr";
+
+export { Tab };
+
+export const Tabs: FC<{
+  storageKey?: string;
+  items: string[];
+  children: ReactElement;
+}> = function ({ storageKey = "tab-index", items, children = null, ...props }) {
+  // Use SWR so all tabs with the same key can sync their states.
+  const { data, mutate } = useSWR(storageKey, (key) => {
+    try {
+      return JSON.parse(localStorage.getItem(key));
+    } catch (e) {
+      return null;
+    }
+  });
+
+  const selectedIndex = items.indexOf(data);
+
+  return (
+    <NextraTabs
+      onChange={(index) => {
+        localStorage.setItem(storageKey, JSON.stringify(items[index]));
+        mutate(items[index], false);
+      }}
+      selectedIndex={selectedIndex === -1 ? undefined : selectedIndex}
+      items={items}
+      {...props}
+    >
+      {children}
+    </NextraTabs>
+  );
+};