A simple js script to present websites beautifully

autoScrollerPresentation.js

// Add here all scroll value you want (each scroll steps). Scroll manually and use pageYOffset to setup it
// If empty, the script will automaticly scroll by 90% of the window height
const scrollOffsets = []

function sleep(ms) {
  return new Promise(resolve => setTimeout(resolve, ms));
}

async function a() {
  const scrollElementHeight = Math.max(document.body.scrollHeight, document.body.offsetHeight,
    document.documentElement.clientHeight, document.documentElement.scrollHeight, document.documentElement.offsetHeight)
  const maxScroll = Window.scrollMaxY || scrollElementHeight - window.innerHeight - 1

  for (let index = 0; index < scrollOffsets.length; index++) {
    await sleep(3000);
    window.scrollTo({
      top: scrollOffsets[index],
      left: 0,
      behavior: 'smooth'
    })
  }

  if (pageYOffset < maxScroll) {
    for (let index = 0; window.pageYOffset < maxScroll; index++) {
      await sleep(3000);
      window.scrollBy({
        top: window.innerHeight*0.9,
        left: 0,
        behavior: 'smooth'
      })
    }
  }
}

a()