CssJsTree is a Rails plugin to allow automatic loading of css and/or javascript files using the same hierarchical structure as your controllers and views for better modularity and separation of concerns.
Say you have controller Admin::User::CommentsController, which has action show and you have the following files under your public/stylesheets folder:
- admin.css
- admin/user.css
- admin/user/comments.css
- admin/user/comments/show.css
CssJsTree will automatically include each of and only the files above that are present when rendering the corresponding view. It works with your javascript files in the same way.
CssJsTree also automatically includes css and js files that correspond to partials that get rendered for each view. It will only include each css and js once per partial. So if you have in your view something like:
...
<% 2.times do %>
<%= render :partial '/shared/foo' %>
<% end>
<%= render :partial '/shared/bar' %>
...
And you have the following files under public/javascripts:
- shared/_foo.js
- shared/_bar.js
Then the _foo.js and _bar.js files will each be included once into your view. It works the same way with your css files.
Install the plugin:
rails plugin install git@github.com:charleseff/css_js_tree.git
Then, in application_controller.rb add this line:
helper CssJsTreeHelper
and add to your layout file:
<html>
<head>
<%= css_tree %>
<%= js_tree %>
</head>
...
</html>
That's it. Now, any css files added to your public/stylesheets folder and js files added to your public/javascripts folder that follow the same hierarchical structure as your controllers, views, and partials will automatically get pulled into your view.
You can access the CssJsTree configuration by opening a CssJsTree.configure block inside your application.rb file like so:
class Application < Rails::Application
...
config.after_initialize do
CssJsTree.configure do |config|
config[:css_tree_location] = 'generated'
config[:js_tree_location] = 'tree'
...
end
end
end
This is useful when you have css files that you want to reside outside of this structure, or when you're using Sass to generate your css files.
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