How to capture a full-page screenshot in Puppeteer?

To capture a full-page screenshot in Puppeteer, you can use the following code snippet:

const puppeteer = require('puppeteer');

(async () => {
  const browser = await puppeteer.launch();
  const page = await browser.newPage();
  await page.goto('https://www.example.com');
  
  const screenshot = await page.screenshot({ 
    fullPage: true,
    path: 'fullpage.png'
  });

  console.log('Screenshot captured and saved as fullpage.png');
  
  await browser.close();
})();

In this code snippet, we launch a Puppeteer browser instance, navigate to a webpage, and then use the page.screenshot() method to capture a full-page screenshot with the fullPage: true option. The screenshot is then saved to a file named "fullpage.png". Finally, we close the browser instance.