//..

(async () => {
    //..

    console.log('Taking a screenshot...');

    // Navigate to target URL and wait until network idle
    await page.goto('https://www.example.com', { waitUntil: 'networkidle' });

    // Take a screenshot and save to screenshot.png
    await page.screenshot({ path: 'screenshot.png', fullPage: true });

    console.log('Screenshot saved as screenshot.png');
    await browser.close();
})();