next.js/examples/cms-payload/payload/utilities/regenerateStaticPage.ts

import { AfterChangeHook } from "payload/dist/collections/config/types";

export const regenerateStaticPage: AfterChangeHook<any> = async ({
  req: { payload },
  doc,
}) => {
  let path = `/${doc.slug}`;

  if (path === "/home") {
    path = "/";
  }

  try {
    const res = await fetch(
      `${process.env.PAYLOAD_PUBLIC_CMS_URL}/api/regenerate?secret=${process.env.PAYLOAD_PRIVATE_REGENERATION_SECRET}&path=${path}`,
    );
    if (res.ok) {
      payload.logger.info(`Now regenerating path '${path}'`);
    } else {
      payload.logger.info(`Error regenerating path '${path}'`);
    }
  } catch (err) {
    payload.logger.info(`Error hitting regeneration route for '${path}'`);
  }
};