What the how the, where the..

<%= javascript_include_tag :defaults %>

this little evil line is pulling in 3 additional JavaScript that I could essentially give less then a damn about. In fact I would like to use that to redefine some defaults on a per page basis. However I can't seem to figure out where those defaults are defined.

Ive been on google and bing looking for answers but I yield none. I keep ing up with a document or 3 that explain using it, but not how I can use it.

What the how the, where the..

<%= javascript_include_tag :defaults %>

this little evil line is pulling in 3 additional JavaScript that I could essentially give less then a damn about. In fact I would like to use that to redefine some defaults on a per page basis. However I can't seem to figure out where those defaults are defined.

Ive been on google and bing looking for answers but I yield none. I keep ing up with a document or 3 that explain using it, but not how I can use it.

• javascript
• ruby-on-rails

Share Improve this question Follow edited Oct 1, 2011 at 9:38 rdvdijk 4,3982828 silver badges3030 bronze badges asked Oct 1, 2011 at 7:37 chrischris 37k5353 gold badges147147 silver badges256256 bronze badges

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2 Answers 2

Sorted by: Reset to default 11

Use the Rails API documentation for this.

If the application is not using the asset pipeline, to include the default JavaScript expansion pass :defaults as source. By default, :defaults loads jQuery, and that can be overridden in config/application.rb:

config.action_view.javascript_expansions[:defaults] = %w(foo.js bar.js)

When using :defaults, if an application.js file exists in public/javascripts it will be included as well at the end.

For rails 6 may use javascript_pack_tag 'application', 'data-turbolinks-track': 'reload'