Puppeteer - taking full page screenshot

puppeteer_page_screenshot.js

const puppeteer = require('puppeteer');

(async () => {
    const browser = await puppeteer.launch();
    const page = await browser.newPage();
    await page.goto('https://techmultitude.com');
    await page.setViewport({width: 320, height: 480});
    await page.waitForNavigation({'waitUntil' : 'networkidle'});
    await page.screenshot({path: 'website.png', fullPage: true});
    await browser.close();
})();