Use JS var in ruby line inside js file

Question

I'm trying to use js var inside ruby line (which all are inside a js.erb file):

my_file.js.erb:

var x = 3;
var credit = "<%= CreditsController.some_method(x) %>";

I know how to replace text in js var, but don't know how to do it before running the ruby part <%= %>

Thanks!

You can't do this that way. You can't use client-side's language variables on server. — Marek Lipka
– Marek Lipka, Commented Oct 14, 2014 at 8:21

sz23 · Accepted Answer · 2014-10-14 09:19:30Z

2

That's not possible because your file my_file.js.erb will be processed into my_file.js on the server side replacing every ruby code with their outputs it provides. Finally, your navigator will execute the javascript.

As Stefan said, you could try fetching that value by an ajax call, or trying to implement that function in the javascript, if it is possible.

edited Oct 14, 2014 at 9:19

answered Oct 14, 2014 at 8:44

sz23

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thaleshcv · Accepted Answer · 2014-10-14 12:50:36Z

0

what you can do is something like:

in your CreditsController:

def some_method
  @credit = 0
end

and in your some_method.js.erb:

var credit = "<%= @credit %>";

answered Oct 14, 2014 at 12:50

thaleshcv

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