HTML5 History API (https://larry-price.com/blog/2015/07/19/muck-with-history-using-the-html5-history-api/)

history.html

<div id="content" style="margin-bottom: 1.5em;">Welcome</div>
<button id="continue" onclick="nextPage()">
  Continue
</button>
<script type="text/javascript" async>
  function nextPage() {
    var content = document.getElementById("content"),
        nextPage = 1;
    if (content.innerHTML === "Welcome") {
      updatePageContent(nextPage);
    } else {
      nextPage = parseInt(content.innerHTML.slice(5))+1;
      updatePageContent(nextPage);
    }

    history.pushState(nextPage, null, "?page=" + nextPage);
  }

  function updatePageContent(pageNumber) {
    var content = document.getElementById("content");
    if (pageNumber === 0) {
      content.innerHTML = "Welcome";
    } else {
      content.innerHTML = "Page " + pageNumber;
    }
  }

  window.onpopstate = function(event) {
    updatePageContent(event.state);
  }

  window.onload = function() {
    var currentPage = parseInt(window.location.search.slice(6)) || 0;
    updatePageContent(currentPage);
    history.replaceState(currentPage, null, window.location.search);
  }
</script>