Function setAmpOptInCookie_

tools/experiments/experiments.js:281–305

* Opts in to / out of the pre-release channels or a specific RTV by setting the * __Host-AMP_OPT_IN cookie. * @param {string} cookieState One of the AMP_OPT_IN_COOKIE enum values, or a * 15-digit RTV.

(cookieState)

 *   15-digit RTV.
 */
function setAmpOptInCookie_(cookieState) {
  let validUntil = 0;
  if (RTV_PATTERN.test(cookieState)) {
    validUntil = Date.now() + RTV_COOKIE_MAX_AGE_MS;
  } else if (cookieState != AMP_OPT_IN_COOKIE.DISABLED) {
    validUntil = Date.now() + COOKIE_MAX_AGE_MS;
  }
  const cookieOptions = {
    allowOnProxyOrigin: true,
    // Make sure the cookie is available for the script loads coming from
    // other domains. Chrome's default of LAX would otherwise prevent it
    // from being sent.
    sameSite: SameSite_Enum.NONE,
    secure: true,
  };
  setCookie(
    window,
    '__Host-AMP_OPT_IN',
    cookieState,
    validUntil,
    cookieOptions
  );
  // Reflect default experiment state.
  self.location.reload();
}

/**
 * Toggles the experiment.