[RUBY] How to adapt Bootstrap

  1. Type the bootstrap code in the gemfile gem 'bootstrap', '~>4.4.1' gem 'jquery-rails'

  2. Type the following code in lines 13-19 of application.js

//= require rails-ujs //= require activestorage //= require turbolinks //= require_tree . //= require jquery3 //= require popper //= require bootstrap-sprockets

  1. Type the following code in the first line of application.css @import "bootstrap";

  2. Change application.css to application.scss

  3. Write css under @import

If you get the following error RuntimeError in StaticPages#contact <%= stylesheet_link_tag 'application', media: 'all', 'data-turbolinks-track': 'reload' %>

Type the following code in the last line of the boot.rb folder ENV['EXECJS_RUNTIME'] = 'Node'

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