ERB in Javascript

rubyonrails-talk
#1

Hi,

I would like to use some ERB in my javascript files.

How can I do this?

#2

Check out Dan Webb's MinusMOR plugin...

http://www.danwebb.net/2006/11/24/minusmor-released

be sure to read the background as well...
http://www.danwebb.net/2006/11/17/rjs-minus-r

Peter

#3

eggie5 wrote:

I would like to use some ERB in my javascript files.

How can I do this?

Someone might know a better way than writing a partial rhtml file, putting a <script> tag in it, and filling this with JavaScript and <%%> tags...

#4

msnapper wrote:

Check out Dan Webb's MinusMOR plugin...

http://www.danwebb.net/2006/11/24/minusmor-released

Kewt!

Can I use it inside a :update do |page| block ?

#5

eggie5 wrote:
> I would like to use some ERB in my javascript files.
>
> How can I do this?

Someone might know a better way than writing a partial rhtml file,
putting a <script> tag in it, and filling this with JavaScript and <%%>
tags...

Well, yes, there is a better way. It mainly lets you avoid the script tag
and refer to the JS with a normal javascript_include_tag call (which means
easy caching). Here's a toy example:

### script_controller

class ScriptController < ApplicationController
  def foo_js
    @necessary_data = Foo.get_that_necessary_data
    render :layout => false, :type => 'text/javascript'
  end
end

### foo_js.rhtml
<%# eruby_subtype=js -%>
MyCacheOfNecessaryData = <%= @necessary_data.to_json %>;

(Note that the eruby_subtype line is a hint to vim 7.1 and later to get
syntax of the file right.)

Naturally, the majority of your JS will be static code and should be served
as such, but when you have some data that needs to be available to the
client-side JS, this is a useful idiom.

  Phlip

--Greg