class Capybara::Selenium::IENode

def disabled?
  # super
  # optimize to one script call
  driver.evaluate_script <<~JS.delete("\n"), self
    arguments[0].msMatchesSelector('
      :disabled,
      select:disabled *,
      optgroup:disabled *,
      fieldset[disabled],
      fieldset[disabled] > *:not(legend),
      fieldset[disabled] > *:not(legend) *,
      fieldset[disabled] > legend:nth-of-type(n+2),
      fieldset[disabled] > legend:nth-of-type(n+2) *
    ')
  JS
end