How to use the chrome-launcher.Launcher.defaultFlags function in chrome-launcher

const chromeFlags = [];
let startingUrl;
let port;
let ignoreDefaultFlags;

if (args.length) {
  const providedFlags = args.filter(flag => flag.startsWith('--'));

  const portFlag = providedFlags.find(flag => flag.startsWith('--port='));
  if (portFlag) port = parseInt(portFlag.replace('--port=', ''), 10);

  const enableExtensions = !!providedFlags.find(flag => flag === '--enable-extensions');
  // The basic pattern for enabling Chrome extensions
  if (enableExtensions) {
    ignoreDefaultFlags = true;
    chromeFlags.push(...Launcher.defaultFlags().filter(flag => flag !== '--disable-extensions'));
  }

  chromeFlags.push(...providedFlags);
  startingUrl = args.find(flag => !flag.startsWith('--'));
}

launch({
  startingUrl,
  port,
  ignoreDefaultFlags,
  chromeFlags,
})
// eslint-disable-next-line no-console
.then(v => console.log(`✨  Chrome debugging port: ${v.port}`));