Hello sudhanshu,
You should search in google regarding dust.js there are about 1,21,00,000 results (0.33 seconds).
There are many resources like github abd tutorials also availble.
I gave you some of reference links just take a look.
https://github.com/linkedin/dustjs/wiki/Dust-Tutorial
http://www.remwebdevelopment.com/blog/javascript/learning-about-dustjs-47.html
I hope you got my point.
Regards,
Nirav Prabtani (Senior Web Developer)
Email : niravjprabtani@gmail.com
blog : niravprabtani.blogspot.in