From 8ce1d7887ee9e8727b9d1c3d97a4ecf4788bd37d Mon Sep 17 00:00:00 2001
From: Alfi Maulana <alfi.maulana.f@gmail.com>
Date: Thu, 11 Sep 2025 10:08:46 +0700
Subject: [PATCH] feat: use `Uint8Array.fromBase64` if available

Signed-off-by: Alfi Maulana <alfi.maulana.f@gmail.com>
---
 lib/index.ts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/index.ts b/lib/index.ts
index 46bec6a..61965fa 100644
--- a/lib/index.ts
+++ b/lib/index.ts
@@ -35,6 +35,11 @@ function b64DecodeUnicode(str: string) {
 }
 
 function base64UrlDecode(str: string) {
+  if ("fromBase64" in Uint8Array && typeof Uint8Array.fromBase64 === "function") {
+    const bytes = Uint8Array.fromBase64(str, { alphabet: "base64url" }) as Uint8Array;
+    return new TextDecoder().decode(bytes);
+  }
+
   let output = str.replace(/-/g, "+").replace(/_/g, "/");
   switch (output.length % 4) {
     case 0: