Extract the RSC payload from the HTML of a Next.js site

read-rsc-payload.js

(() => {
  const env = { self: {} };
  const chunks = Array.from(document.body.querySelectorAll("script"))
    .filter((s) => !!s.textContent && s.textContent.includes("self.__next_f"))
    .forEach((s) => new Function("self", s.textContent)(env.self));
  return env.self.__next_f
    .filter((c) => c[0] === 1)
    .map((c) => c[1])
    .join("");
})();