legacy script for reloading page when user browsed back with back bjtton

reloadpage-on-back-button.js

//  this script checks if browser go back button was used to get to this page and if so reloads the page to update cart number

// deprecated
// check PerformanceNavigationTiming.type to update this soon. initial test returns nothing... and different between chrome and firefox.
// http://wpt.live/navigation-timing/nav2_test_navigation_type_backforward.html
window.addEventListener( "pageshow", function ( event ) {
  var historyTraversal = event.persisted || ( typeof window.performance != "undefined" && window.performance.navigation.type === 2 );
  if ( historyTraversal ) {
    // Handle page restore.
    window.location.reload();
  }
});