window.addEventListener("load", async function() {
  document.getElementById("preloader").classList.add("fadeout");
  //  I don't actually know how promises or async works
  //  ¯\_(ツ)_/¯
  // https://stackoverflow.com/questions/951021/what-is-the-javascript-version-of-sleep
  await new Promise(r => setTimeout(r, 250))
  document.getElementById("preloader").style.display = "none";
});