From 8df2621a9254ec8b06050e98494900303ebd19c2 Mon Sep 17 00:00:00 2001
From: Hing-Lung Lau <lung220@gmail.com>
Date: Thu, 31 Mar 2016 17:10:42 +0800
Subject: [PATCH] Add JavaScript version to render the hash digest.

---
 URL-signing.md | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/URL-signing.md b/URL-signing.md
index 86ae025..6edd0ff 100644
--- a/URL-signing.md
+++ b/URL-signing.md
@@ -89,4 +89,15 @@ import base64
 key = 'secret key'
 data = 'https://octodex.github.com/images/codercat.jpg'
 print base64.urlsafe_b64encode(hmac.new(key, msg=data, digestmod=hashlib.sha256).digest()) 
+```
+
+### JavaScript
+
+```javascript
+import crypto from 'crypto';
+import URLSafeBase64 from 'urlsafe-base64';
+
+let key = 'secret key';
+let data = 'https://octodex.github.com/images/codercat.jpg';
+console.log(URLSafeBase64.encode(crypto.createHmac('sha256', key).update(data).digest()));
 ```
\ No newline at end of file