@kentcdodds/tmp-remix-utils/build/server/rolling-cookie.js

This package contains simple utility functions to use with [Remix.run](https://remix.run).

export async function rollingCookie(cookie, request, responseHeaders) {
  let value = await cookie.parse(responseHeaders.get("Set-Cookie"));
  if (value !== null) return;
  value = await cookie.parse(request.headers.get("Cookie"));
  if (!value) return;
  responseHeaders.append("Set-Cookie", await cookie.serialize(value));
}