I am trying to store some data into a group of PDF files using Puppeteer. But when I try to run this code my app is freezing and I assume I am doing something wrong with the async and await code. It seems to be working properly, the documents are created properly in the folder of the project, but at some point node crashes and I must reboot my PC.

 const path = require("path");
 const puppeteer = require("puppeteer");
 const fs = require('fs');

 for (let index = 0; index < documentsToPDF.length; index ++) {
        const result = await generatePDF(documentsToPDF[index]);
        await createAndSavePDFInFile(documentsToPDF[index], result);
      }

async function generatePDF(browser, numdoc) {
  const filePage = await browser.newPage();
  filePage.setDefaultNavigationTimeout(0);
  await filePage.goto(renderPath(numdoc), {
    waitUntil: "networkidle0",
  });
  return filePage.pdf({
    format: "A4",
  });
}

async function createAndSavePDFInFile(numdoc, result) {
  console.log(result);
  if(result) {
    return fs.writeFile(
      path.join(__dirname, `../results/result-${numdoc}.pdf`),
      result,
      (error, result) => {
        if(error) console.log('error', err);
        else console.log(`PDF result-${numdoc}.pdf `);
      }
    ); 
  } else {
    console.log(`numdoc `, numdoc, ' could not be saved into pdf');
  }

}

Thanks for your help, I'm new to node and I'm learning :)

EDIT:

This loop now is working fine

for (let index = 0; index < documentsToPDF.length; index += 1) {
    const browser = await puppeteer.launch(puppeteerParams);
    const result = await generatePDF(browser,documentsToPDF[index]);
    await createAndSavePDFInFile(documentsToPDF[index], result);
    browser.close();
    console.log('Exp: ', documentsToPDF[index], ' SUCCESS');
}

But can I do something like this?

   const pdfPromises = [];
  for (let index = 0; index < documentsToPDF.length; index += 1) {
    pdfPromises.push(createPdf(puppeteer, puppeteerParams, documentsToPDF[index]))
  }

await Promise.all(pdfPromises);


async function createPdf(puppeteer, puppeteerParams, numexp) {
  const browser = await puppeteer.launch(puppeteerParams);
  const result = await generatePDF(browser, numexp);
  await createAndSavePDFInFile(numexp, result);
  browser.close();
  console.log('Exp: ', numexp, ' SUCCESS');
}

I've tried and it returns this error:

MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 event listeners added. Use emitter.setMaxListeners() to increase limit.