[This does not work for some reason] Use puppeteer to get nodes containing text

get-text.js

function matchNodes(text) {

  try {

    const filter = {
      acceptNode: function(node){
        if(node.nodeValue.toLowerCase().includes(text)){
          return NodeFilter.FILTER_ACCEPT
        }

        return NodeFilter.FILTER_REJECT
      }
    }

    const nodes = []
    const rootElement = document.body
    const walker = document.createTreeWalker(rootElement, NodeFilter.SHOW_TEXT, filter, false)

    while(walker.nextNode()) {
      nodes.push(walker.currentNode.parentNode)
    }
    console.log(nodes) // This will contain nodes
    return nodes
  }
  catch(e) {
    console.error(e)
    return e
  }

}

const puppeteer = require('puppeteer');

(async () => {
  const browser = await puppeteer.launch();
  const page = await browser.newPage();
  await page.goto('http://www.greenmatters.com')
  const nodes = await page.evaluate(matchNodes, 'news')
  console.log('nodes', nodes) // This will be undefined
  await browser.close();
})();