node js puppeteer metadata - node.js

Question

I am new to Puppeteer, and I am trying to extract meta data from a Web site using Node.JS and Puppeteer. I just can't seem to get the syntax right. The code below works perfectly extracting the Title tag, using two different methods, as well as text from a paragraph tag. How would I extract the content text for the meta data with the name of "description" for example?
meta name="description" content="Stack Overflow is the largest, etc"
I would be seriously grateful for any suggestions! I can't seem to find any examples of this anywhere (5 hours of searching and code hacking later). My sample code:
const puppeteer = require('puppeteer');
async function main() {
const browser = await puppeteer.launch({headless: false});
const page = await browser.newPage();
await page.goto('https://stackoverflow.com/', {waitUntil: 'networkidle2'});
const pageTitle1 = await page.evaluate(() => document.querySelector('title').textContent);
const pageTitle2 = await page.title();
const innerText = await page.evaluate(() => document.querySelector('p').innerText);
console.log(pageTitle1);
console.log(pageTitle2);
console.log(innerText);
};
main();

Answer 1

You need a deep tutorial for CSS selectors MDN CSS Selectors.
Something that I highly recommend is testing your selectors on the console directly in the page you will apply the automation, this will save hours of running-stop your system. Try this:
document.querySelectorAll("head > meta[name='description']")[0].content;
Now for puppeteer, you need to copy that selector and past on puppeteer function also I like more this notation:
await page.$eval("head > meta[name='description']", element => element.content);
Any other question or problem just comment.

Answer 2

For anyone struggling to get the OG tags in Puppeteer , here is the solution.
let dom2 = await page.evaluate(() => {
return document.head.querySelector('meta[property="og:description"]').getAttribute("content");
});
console.log(dom2);

Answer 3

If you prefer to avoid $eval, you can do:
const descriptionTag = await page.$('meta[name="description"]');
const description = await descriptionTag?.getAttribute('content');