How to set a viewport size in Puppeteer?

In Puppeteer, you can set the viewport size by using the setViewport method on the Page object. Here's an example on how to set the viewport size to 1200x800:

const puppeteer = require('puppeteer');

(async () => {
  const browser = await puppeteer.launch();
  const page = await browser.newPage();

  await page.setViewport({ width: 1200, height: 800 });

  // Continue with your code...

  await browser.close();
})();

In this example, setViewport is called on the page object with an object that contains the desired width and height of the viewport. You can adjust these values to set a different viewport size for your Puppeteer script.