# Question: How do I mix Ruby and Javascript in application.js

**URL:** <https://www.ruby-forum.com/t/question-how-do-i-mix-ruby-and-javascript-in-application-js/187102>\
**Category:** Rails\
**Created:** [April 17, 2010, 2:20am UTC](https://www.ruby-forum.com/t/question-how-do-i-mix-ruby-and-javascript-in-application-js/187102 "2010-04-17T02:20:50Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![jose](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/e274bd/32.png) [@jose](https://www.ruby-forum.com/u/jose)\
**Post date:** [April 17, 2010, 2:20am UTC](https://www.ruby-forum.com/t/question-how-do-i-mix-ruby-and-javascript-in-application-js/187102/1 "2010-04-17T02:20:50Z")

</div>

How can I get rails to process and serve application.js.erb instead of  
application.js?

I want to mix Ruby and Javascript code in the file. I am building  
Javascript arrays from data that i keep in a Rails model and the  
arrays are static.

---

<div class="post-metadata">

**Author:** ![jose](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/j/e274bd/32.png) [@jose](https://www.ruby-forum.com/u/jose)\
**Post date:** [April 17, 2010, 1:46pm UTC](https://www.ruby-forum.com/t/question-how-do-i-mix-ruby-and-javascript-in-application-js/187102/2 "2010-04-17T13:46:10Z")

</div>

Create application.js.erb and put it in views/js/

then you  
render :partial =\> ‘js/application.js.erb’, :locals =\> {:data =\>  
@your\_data}

and use variable ‘data’ in your partial like