Replacing Images on Google Document in Order using Google Apps Script

function myFunction() {
  // Please set the file IDs of the images in your Google Drive.
  const fileIds = ["###", "###", "###", , , ,];

  // Create direct links of the images.
  const urls = fileIds.map((id) =>
    Drive.Files.get(id).thumbnailLink.replace(/\=s.+/, "=s512")
  );

  // Retrieve the original title of images and set the unique image titles using Docs API.
  const doc = DocumentApp.getActiveDocument();
  const images = doc.getBody().getImages();
  const titles = images.reduce((m, e, i) => {
    const org = e.getAltTitle();
    e.setAltTitle(`sample${i}`);
    m.set(`sample${i}`, { title: org, uri: urls[i] });
    return m;
  }, new Map());
  doc.saveAndClose();

  // Create request body of Docs API.
  const { inlineObjects } = Docs.Documents.get(doc.getId(), {
    fields: "inlineObjects",
  });
  const requests = Object.entries(inlineObjects).reduce(
    (
      ar,
      [
        imageObjectId,
        {
          inlineObjectProperties: { embeddedObject },
        },
      ]
    ) => {
      if (
        embeddedObject.hasOwnProperty("imageProperties") &&
        embeddedObject.title
      ) {
        const { uri } = titles.get(embeddedObject.title);
        ar.push({ replaceImage: { imageObjectId, uri } });
      }
      return ar;
    },
    []
  );

  // Request Docs API using the created request body.
  Docs.Documents.batchUpdate({ requests }, doc.getId());

  // Set the original titles to the images.
  const ar = [...titles];
  DocumentApp.getActiveDocument()
    .getBody()
    .getImages()
    .forEach((e, i) => e.setAltTitle(ar[i][1].title));
}