function toggleListingsMinimization() {
  const body = document.getElementsByTagName("body")[0]
  if( body.classList.contains('config_minimize_newest_listings')) {
    //Un-minimize
    localStorage.setItem(
      'config_minimize_newest_listings',
      'no') 
      body.classList.remove("config_minimize_newest_listings");
  } else {
    //Minimize
    localStorage.setItem(
      'config_minimize_newest_listings',
      'yes')
      body.classList.add("config_minimize_newest_listings");
  }
}

document.getElementById('sidebar-listings-widget-minimize-button').addEventListener('click', toggleListingsMinimization);