Ruby on Rails 7.0.1 and Tailwind 3, tailwind classes are not being displayed in the browser
Asked Answered
N

7

9

I'm trying to set up my rails project with tailwind, but none of the actual tailwind changes are showing up in the browser. In devtools the class is displayed, but it doesn't make any change in the browser (the background is not red). RoR version is 7.0.1, Tailwindcss is 3.0.13, and Ruby is 2.7.2. I set it up following https://www.youtube.com/watch?v=JsNtLiph87Y and here is my tailwind.config:

module.exports = {
  content: [
    './app/views/**/*.html.erb',
    './app/helpers/**/*.rb',
    './app/javascript/**/*.js'
  ],
  mode: 'jit',
}

here is my Gemfile:

source "https://rubygems.org"
git_source(:github) { |repo| "https://github.com/#{repo}.git" }

ruby "2.7.2"

# Bundle edge Rails instead: gem "rails", github: "rails/rails", branch: "main"
gem "rails", "~> 7.0.1"

# The original asset pipeline for Rails [https://github.com/rails/sprockets-rails]
gem "sprockets-rails"

# Use postgresql as the database for Active Record
gem "pg", "~> 1.1"

# Use the Puma web server [https://github.com/puma/puma]
gem "puma", "~> 5.0"

# Bundle and transpile JavaScript [https://github.com/rails/jsbundling-rails]
gem "jsbundling-rails"

# Hotwire's SPA-like page accelerator [https://turbo.hotwired.dev]
gem "turbo-rails"

# Hotwire's modest JavaScript framework [https://stimulus.hotwired.dev]
gem "stimulus-rails"

# Bundle and process CSS [https://github.com/rails/cssbundling-rails]
gem "cssbundling-rails"

# Build JSON APIs with ease [https://github.com/rails/jbuilder]
gem "jbuilder"

# Use Redis adapter to run Action Cable in production
gem "redis", "~> 4.0"

# Use Kredis to get higher-level data types in Redis [https://github.com/rails/kredis]
# gem "kredis"

# Use Active Model has_secure_password [https://guides.rubyonrails.org/active_model_basics.html#securepassword]
# gem "bcrypt", "~> 3.1.7"

# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem "tzinfo-data", platforms: %i[ mingw mswin x64_mingw jruby ]

# Reduces boot times through caching; required in config/boot.rb
gem "bootsnap", require: false

# Use Sass to process CSS
# gem "sassc-rails"

# Use Active Storage variants [https://guides.rubyonrails.org/active_storage_overview.html#transforming-images]
# gem "image_processing", "~> 1.2"

group :development, :test do
  # See https://guides.rubyonrails.org/debugging_rails_applications.html#debugging-with-the-debug-gem
  gem "debug", platforms: %i[ mri mingw x64_mingw ]
end

group :development do
  # Use console on exceptions pages [https://github.com/rails/web-console]
  gem "web-console"

  # Add speed badges [https://github.com/MiniProfiler/rack-mini-profiler]
  # gem "rack-mini-profiler"

  # Speed up commands on slow machines / big apps [https://github.com/rails/spring]
  # gem "spring"
end

group :test do
  # Use system testing [https://guides.rubyonrails.org/testing.html#system-testing]
  gem "capybara"
  gem "selenium-webdriver"
  gem "webdrivers"
end

here is my application.html.erb

<!DOCTYPE html>
<html>
  <head>
    <title>Nekonomicon</title>
    <meta name="viewport" content="width=device-width,initial-scale=1">
    <%= csrf_meta_tags %>
    <%= csp_meta_tag %>

    <%= stylesheet_link_tag "application", "data-turbo-track": "reload" %>
    <%= javascript_include_tag "application", "data-turbo-track": "reload", defer: true %>
  </head>

  <body>
    <%= yield %>
  </body>
</html>

and here is the Home index page (route is home#index) index.html.erb

<div class="bg-red-500">HELP</div>

The HELP is displaying but not the background

Nguyen answered 12/1, 2022 at 16:54 Comment(1)
What version of Node are you running?Incarnate
O
24

Running rake tailwindcss:build may solve the problem, but you would not want to do that after every change of a HTML class.

What you should do instead is starting your development webserver with bin/dev (instead of rails server) which will use Foreman to not only start Puma but also make Tailwind listen for changes in your CSS and (re)build the CSS file on the fly.

Olympian answered 13/1, 2022 at 22:59 Comment(2)
Running the rake command after installing the gems worked for me.Victorie
@Victorie did this require you to do it after every change for it to be reflected in the browser?Blende
S
6

You have to rebuild your css by command:

rails tailwindcss:build 

Or try to use hotwire-livereload gem for live reloading

Serrato answered 28/1, 2022 at 23:36 Comment(2)
This does not provide an answer to the question. To critique or request clarification from an author, leave a comment below their post. - From ReviewParonymous
add option for live reloading that could fix the problemSerrato
W
2

Don't forget to add stylesheet tag to application layout if you install Tailwind manually

<%= stylesheet_link_tag "tailwind", "inter-font", "data-turbo-track": "reload" %>
Whereas answered 18/1 at 20:19 Comment(0)
D
1

in development you can use

rails tailwindcss:watch

https://github.com/rails/tailwindcss-rails#update-assets-automatically

Druse answered 24/10, 2023 at 12:2 Comment(0)
A
0

I had the same issue and the only thing that I needed to do was run:

rails tailwindcss:build

Alejoa answered 19/6, 2022 at 20:12 Comment(0)
F
0

Use Live rebuild

While you're developing your application, you want to run Tailwind in "watch" mode, so changes are automatically reflected in the generated CSS output. You can do this use this gem's Puma plugin to integrate "watch" with rails server. To use it, add this line to your puma.rb configuration:

plugin :tailwindcss if ENV.fetch("RAILS_ENV", "development") == "development"

and then running rails server will run the Tailwind watch process in the background.

Reference: Tailwind CSS for Rails

Fetch answered 31/3 at 4:36 Comment(0)
M
0

I uncovered the issues I had by setting config.assets.debug = true in config/environments/development.rb and restarting the server! It reported all issues I had with my assets which I then fixed.

More here: https://mcmap.net/q/769295/-tailwind-css-not-being-generated-in-a-rails-7-project-in-heroku

Makeweight answered 27/4 at 1:55 Comment(0)

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