function scrollListener() {
  /* add passive listener
  const scrollHandler = document.addEventListener("scroll", (ev) => {
    docStyle.setProperty("--scrolly", document.body.scrollTop)
  }, {passive: true})
  */
}
/*
 * Listen to scroll-y, update css --scrolly variable
 */
Listen to scroll-y, update css --scrolly variable
Listen to scroll - y update css -- scrolly variable
function scrollListener() {
}
function scrollListener ( ) { }
Listen to scroll-y, update css --scrolly variable
Listen to scroll - y update css -- scrolly variable
/* add passive listener
  const scrollHandler = document.addEventListener("scroll", (ev) => {
    docStyle.setProperty("--scrolly", document.body.scrollTop)
  }, {passive: true})
  */