Puppeteer wait until page is completely loaded

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You can use page.waitForNavigation() to wait for the new page to load completely before generating a PDF:

await page.goto(fullUrl, {
  waitUntil: 'networkidle0',
});

await page.type('#username', 'scott');
await page.type('#password', 'tiger');

await page.click('#Login_Button');

await page.waitForNavigation({
  waitUntil: 'networkidle0',
});

await page.pdf({
  path: outputFileName,
  displayHeaderFooter: true,
  headerTemplate: '',
  footerTemplate: '',
  printBackground: true,
  format: 'A4',
});

If there is a certain element that is generated dynamically that you would like included in your PDF, consider using page.waitForSelector() to ensure that the content is visible:

await page.waitForSelector('#example', {
  visible: true,
});

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