puppeteer.js

'use strict';

const puppeteer = require('puppeteer');
const Push = require( 'pushover-notifications' );
 
const p = new Push( {
  user: '',
  token: '',
});
 

(async function main() {
  try {

    const browser = await puppeteer.launch({args: ['--no-sandbox']});
    const [page] = await browser.pages();

    await page.goto('https://www.razer.com/gb-en/comparisons/blade-15');
    
    let divselector = "#comparison > div > div > div:nth-child(4) > div > div.text-center.col-sm-3.col-xs-6.counter-3.col-hidden > div";

    const cart = await page.$eval(divselector, el => el.textContent.trim().substr(0,17));
    console.log(cart);
    if (cart !== "AVAILABLE IN JULY") {
      p.send({
        message: 'text has changed: ' + cart,	// required
        title: "puppeteer message",
        sound: 'magic',
        device: 'devicename',
        priority: 1
      })
    }

    await browser.close();

  } catch (err) {
    console.error(err);
  }
})();