Function isExperimentOn_

tools/experiments/experiments.js:259–273

* Returns whether the experiment is on or off. * @param {string} id * @return {boolean}

(id)

 * @return {boolean}
 */
function isExperimentOn_(id) {
  const optInCookieValue = getCookie(window, '__Host-AMP_OPT_IN');
  switch (id) {
    case EXPERIMENTAL_CHANNEL_ID:
      return optInCookieValue == AMP_OPT_IN_COOKIE.EXPERIMENTAL;
    case BETA_CHANNEL_ID:
      return optInCookieValue == AMP_OPT_IN_COOKIE.BETA;
    case NIGHTLY_CHANNEL_ID:
      return optInCookieValue == AMP_OPT_IN_COOKIE.NIGHTLY;
    case RTV_CHANNEL_ID:
      return RTV_PATTERN.test(optInCookieValue);
    default:
      return isExperimentOn(window, /*OK*/ id);
  }
}

/**
 * Opts in to / out of the pre-release channels or a specific RTV by setting the