JSFiddle - React, Tailwind, and code Playground

HTML

<a href="https://jsfiddle.net/psftzxdw/" target="_blank">link</a>
<div id="ids"></div>

CSS

#ids{
  width; 200px;
}

JavaScript

var id = Math.floor(Math.random()*1000);//this have to identify a page
//console.log(id)

if (!localStorage.getItem("ids")) {

  localStorage.setItem("ids", '{"ids":[' + id + ']}')
} else {
  var ids = JSON.parse(localStorage.getItem("ids"));
  ids.ids.push(id);
  localStorage.setItem("ids", JSON.stringify(ids));
  
  document.getElementById("ids").innerHTML = ids.ids.join(" - ");
  
}