Ruby on Railsframework~30 mins

Why asset management matters in Ruby on Rails - See It in Action

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Why asset management matters

📖 Scenario: You are building a simple Rails web page that includes CSS and JavaScript files. Proper asset management helps your app load faster and keeps your code organized.

🎯 Goal: Create a basic Rails view that uses the asset pipeline to include CSS and JavaScript files correctly.

📋 What You'll Learn

Create a CSS file with a background color style

Create a JavaScript file with a simple alert function

Configure the Rails view to include these assets using the asset pipeline helpers

Ensure the assets are linked properly in the HTML layout

💡 Why This Matters

🌍 Real World

Managing assets like CSS and JavaScript properly is essential for building fast, maintainable web applications with Rails.

💼 Career

Understanding Rails asset management is important for Rails developers to optimize app performance and organize frontend code.

Progress0 / 4 steps

Create CSS and JavaScript asset files

Create a CSS file named custom.css inside app/assets/stylesheets/ with the content body { background-color: #f0f0f0; }. Also create a JavaScript file named custom.js inside app/assets/javascripts/ with the content alert('Welcome to asset management!');.

Ruby on Rails

# Create custom.css and custom.js files with the specified content
# Your code here

Need a hint?

Put the CSS code in app/assets/stylesheets/custom.css and the JavaScript code in app/assets/javascripts/custom.js.

Add asset references in the application layout

Open the file app/views/layouts/application.html.erb and add the Rails helpers <%= stylesheet_link_tag 'custom', media: 'all' %> and <%= javascript_include_tag 'custom' %> inside the <head> section to include the CSS and JavaScript files.

Ruby on Rails

/* app/assets/stylesheets/custom.css */
body { background-color: #f0f0f0; }

// app/assets/javascripts/custom.js
alert('Welcome to asset management!');


# Your code here

Need a hint?

Use stylesheet_link_tag and javascript_include_tag helpers inside the <head> tag.

Create a simple view to test asset loading

Create a new view file app/views/home/index.html.erb with the content <h1>Welcome to Asset Management</h1>. Also create a controller HomeController with an index action that renders this view.

Ruby on Rails

/* app/assets/stylesheets/custom.css */
body { background-color: #f0f0f0; }

// app/assets/javascripts/custom.js
alert('Welcome to asset management!');





  AssetManagementApp
  
  

  
  


  



# Create app/views/home/index.html.erb with an h1 tag
# Create HomeController with index action
# Your code here

Need a hint?

Create the view file with the heading and a controller with an empty index method.

Set root route to home#index

In the config/routes.rb file, set the root route to home#index by adding root 'home#index'.

Ruby on Rails

/* app/assets/stylesheets/custom.css */
body { background-color: #f0f0f0; }

// app/assets/javascripts/custom.js
alert('Welcome to asset management!');





  AssetManagementApp
  
  

  
  


  



# app/views/home/index.html.erb
Welcome to Asset Management

# app/controllers/home_controller.rb
class HomeController < ApplicationController
  def index
  end
end

# Add root route in config/routes.rb
# Your code here

Need a hint?

Open config/routes.rb and add root 'home#index' inside the Rails.application.routes.draw do block.