Shadow DOM support for Capybara

The capybara-shadowdom gem adds basic support for the Shadow DOM to Capybara.

Installation

Add this line to your application's Gemfile:

gem 'capybara-shadowdom'

And then execute:

$ bundle install

Or install it yourself as:

$ gem install capybara-shadowdom

Usage

Require it in spec_helper.rb:

require 'capybara/shadowdom'

Given the custom element:

<awesome-element>
  <!-- #shadow-root start -->
  <span>Hello shadow world!</span>

  <input type="text" id="user_name">
  <!-- #shadow-root end -->
</awesome-element>

You will be able to do:

within custom_element.shadow_root do
  # Displays "Hello shadow world!":
  puts page.text

  # Asserts the text within the element:
  assert_text "Hello shadow world!"

  # Input elements within the shadow DOM will also be accessible:
  fill_in "#user_name", with: "awesome@example.org"
end

Works also for RSpec:

expect(page).to have_text("Hello shadow world!")

Browser Support

• Supported Selenium versions: 3.0 and above
• Supported Ruby versions: 2.7 and above

Supported drivers:

Driver	Browser	Support	Description
Selenium	IE11	N/A	Shadow DOM is not supported.
Selenium	Edge	✅
Selenium	Firefox	❌	Fails with Cyclic object value.
Selenium	Chrome	✅
Selenium	Safari	✅
cuprite	Embedded Chromium	✅
apparition	Embedded Chromium	❌	shadowRoot node can not be retrieved.

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake test to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and the created tag, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/yuki24/capybara-shadowdom. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the code of conduct.

License

The gem is available as open source under the terms of the MIT License.

Code of Conduct

Everyone interacting in the Capybara::Shadowdom project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.