I have some statebar

let stepState = 0;
localStorage.setItem('stepState', stepState);

after some click i add for localstorage item 1 value and refreshing page

$('.btn').click( function() {
stepStateStone = 1;
localStorage.setItem('stepState', stepState);
  window.location = "newpage.com";
}

After refreshing page my localstorage value again returning to 0

How can i save my updating localstorage after refreshing page?