resources/script.js
function updateURL() {
  try {
    window.history.replaceState({} , null, '#' + currentPosition());
  } catch (e) {
    window.location.hash = currentPosition();
  }
}
function updateURL() {
  try {
    window.history.replaceState({} , null, '#' + currentPosition());
  } catch (e) {
    window.location.hash = currentPosition();
  }
}
Updates the current URL to include a hashtag of the current page number.