Update PDF title (meta data)

index.js

/*
  To run the project:
  yarn install
  node index.js
*/

import { PDFDocument } from 'pdf-lib';
import { promises } from 'fs';
import { parse } from 'path';

const filePath = './path-and-file-name.pdf';
const newTitle = 'new title';

async function EditMetaData() {
    const fileData = await promises.readFile(filePath);
    const pdfDoc = await PDFDocument.load(fileData);

    pdfDoc.setTitle(newTitle);
    const pdfBytes = await pdfDoc.save();

    const fileName = parse(filePath).name;
    const fileExtension = parse(filePath).ext;
    await promises.writeFile(`./${fileName}-edited${fileExtension}`, pdfBytes)
};

EditMetaData();

package.json

{
  "name": "edit-pdf",
  "version": "1.0.0",
  "main": "index.js",
  "license": "MIT",
  "dependencies": {
    "pdf-lib": "^1.17.1"
  },
  "type": "module"
}