Wait for AJAX

bad.rb

def wait_for_ajax(timeout: Capybara.default_max_wait_time)
  Timeout.timeout(timeout) do # Bad.
    loop until finished_all_ajax_requests?
  end
end

def finished_all_ajax_requests?
  !page.evaluate_script '(window.jQuery || {}).active'
end

good.rb

def wait_for_ajax(timeout: Capybara.default_max_wait_time)
  max_time = Capybara::Helpers.monotonic_time + timeout
  while Capybara::Helpers.monotonic_time < max_time
    return if finished_all_ajax_requests?
    sleep 0.1
  end
  raise 'AJAX timeout exceeded'
end

def finished_all_ajax_requests?
  !page.evaluate_script '(window.jQuery || {}).active'
end