What elements should be replaced for localStorage?

Question

I want to create a hit counter for my Tumblr blog. But it failed to show all client numbers as I'm using localStorage. What should I replaced it with? Thank you!
CODE

var visitCount = localStorage.getItem("page_view");

if (visitCount) {
  visitCount = Number(visitCount) + 1;
  localStorage.setItem("page_view", visitCount);
} else {
  visitCount = 1;
  localStorage.setItem("page_view", 1);
}
counterContainer.innerHTML = visitCount;