const fs = require('fs');
const content = fs.readFileSync('D:/cumin/ghaymah_dns_net_sec_tests/ghaymah_bundle.js', 'utf8');

const idx = content.indexOf('t(D.port),expose:D.exposePort');
if (idx !== -1) {
  console.log(content.substring(idx - 600, idx + 100));
}