title: Puppeteer page.content() not matching the html in chromium
body: <p>When I try to run this:</p>
  <pre class="lang-js prettyprint-override"><code>const puppeteer = require('puppeteer')
  
  async function start() {
      const browser = await puppeteer.launch({headless: false, slowMo: 250})
      const page = await browser.newPage()
      await page.goto('https://www.lanuv.nrw.de/umwelt/luft/immissionen/messorte-und-werte', {waitUntil: &quot;domcontentloaded&quot;})
      console.log(await page.content())
      await browser.close()
  }
  
  start()
  </code></pre>
  <p>The <code>page.content()</code> does not match the html I can see in a browser. I´m assuming the website is JS-based and I am just getting the original (not hydrated) content of the website when it reached chromium.
  How do I get the Html content I can see in chromium? I actually do not need the entire page, just some data of it. But page.$$ was not helpful either.</p>