headless_chrome.rb

require 'capybara'
require 'capybara/apparition'
require 'forwardable'

Capybara.threadsafe = true

Capybara.register_driver :apparition do |app|
  Capybara::Apparition::Driver.new(app, headless: true,
                                        js_errors: false,
                                        browser_logger: nil)
end

class HeadlessChrome
  attr_reader :session

  extend Forwardable

  delegate Capybara::Session::DSL_METHODS => :session

  def initialize
    @session = Capybara::Session.new(:apparition)
  end

  def crawl(url, &block)
    session.visit(url)
    self.instance_eval &block
  end

  def network_requests
    session.driver.network_traffic
  end
end