Hi Rahul,
Just for your information, if you want to use js intellisense in VS IDE when
editing the js code for your windows store app, make sure you have added the
<script src= .... ></script> reference for all the js files (your
own or 3rd party library) in the same html page's <head> section.
Please remember to mark the replies as answers if they help and unmark them if they provide no help.