https://github.com/ai/nanoid
origin - http://www.pipiscrew.com/?p=9900 tiny-179-bytes-secure-url-friendly-unique-string-id-generator-for-javascript
https://github.com/ai/nanoid
origin - http://www.pipiscrew.com/?p=9900 tiny-179-bytes-secure-url-friendly-unique-string-id-generator-for-javascript