persist turbolinks position in vanilla js

persist-turbolinks.js

Turbolinks.scroll = {}

document.addEventListener('click', function(e) {
  var el = e.target;
  if (el.getAttribute('data-turbolinks-scroll') !== 'false') return;
  Turbolinks.scroll.top = window.scrollY || document.documentElement.scrollTop || document.documentElement.scrollTop;
});

document.addEventListener('turbolinks:load', function() {
  if (Turbolinks.scroll.top) {
    window.scrollY = document.documentElement.scrollTop = document.body.scrollTop = Turbolinks.scroll.top;
  }
  Turbolinks.scroll = {};
});