First commit

lib/supabase/browser.ts

@@ -0,0 +1,18 @@
+import { createClient, type SupabaseClient } from "@supabase/supabase-js";
+
+let browserClient: SupabaseClient | null = null;
+
+export const supabaseBrowser = (): SupabaseClient | null => {
+  const url = process.env.NEXT_PUBLIC_SUPABASE_URL;
+  const anonKey = process.env.NEXT_PUBLIC_SUPABASE_ANON_KEY;
+
+  if (!url || !anonKey) {
+    return null;
+  }
+
+  if (!browserClient) {
+    browserClient = createClient(url, anonKey);
+  }
+
+  return browserClient;
+};