[RUBY] How to deploy Bootstrap on Rails

How to deploy Bootstrap in Ruby


Install Bootstrap with gem


gem 'bootstrap', '~> 4.3.1'
gem 'jquery-rails'


bundle install

Create SCSS file


mv app/assets/stylesheets/application.css app/assets/stylesheets/application.scss


 * This is a manifest file that'll be compiled into application.css, which will include all the files
 * listed below.
 * Any CSS and SCSS file within this directory, lib/assets/stylesheets, or any plugin's
 * vendor/assets/stylesheets directory can be referenced here using a relative path.
 * You're free to add application-wide styles to this file and they'll appear at the bottom of the
 * compiled file so the styles you add here take precedence over styles defined in any other CSS/SCSS
 * files in this directory. Styles in this file should be added after the last require_* statement.
 * It is generally better to create a new file per style scope.
 *= require_tree .<(Deleted)
 *= require_self <(deleted)
@import "bootstrap";<(Addition)

Modify JS file


#Added the following three
//= require jquery3
//= require popper
//= require bootstrap

#Original code
//= require rails-ujs
//= require activestorage
//= require turbolinks

Restart Rails (Puma)


#Install the required packages for Rails
RUN apt-get update -qq && apt-get install -y nodejs
RUN curl -sL https://deb.nodesource.com/setup_10.x | bash - \
    && apt-get install -y nodejs

#In the description of the official website below, node.The version of js is low and bootstrap cannot be used
# RUN apt-get update -qq && apt-get install -y nodejs

How to use Bootstrap (template)


<!DOCTYPE html>
    <%= csrf_meta_tags %>
    <%= csp_meta_tag %>

    <%= stylesheet_link_tag 'application', media: 'all', 'data-turbolinks-track': 'reload' %>
    <%= javascript_include_tag 'application', 'data-turbolinks-track': 'reload' %>

    <div class="d-flex flex-column flex-md-row align-items-center p-3 px-md-4 mb-3 bg-white border-bottom shadow-sm">
      <h5 class="my-0 mr-md-auto font-weight-normal">Company name</h5>
      <nav class="my-2 my-md-0 mr-md-3">
        <a class="p-2 text-dark" href="#">Features</a>
        <a class="p-2 text-dark" href="#">Enterprise</a>
        <a class="p-2 text-dark" href="#">Support</a>
        <a class="p-2 text-dark" href="#">Pricing</a>
      <a class="btn btn-outline-primary" href="#">Sign up</a>
    <p class="notice"><%= notice %></p>
    <p class="alert"><%= alert %></p>
    <%= yield %>

It will be like this!


That's all from the scene!

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