const request = require('superagent');

const checkItemInStock = async () => {
  const {text: html} = await request.get(
    'https://www.bowflex.com/selecttech/552/100131.html'
  );
  const inStock = html.toLowerCase().indexOf('out of stock') === -1;

  return {inStock};
};

checkItemInStock().then(console.log).catch(console.log);