Answers for "scroll to bottom if not already at bottom javascript"

javascript detect scroll to bottom of page

function scrolled(e) {
  if (myDiv.offsetHeight + myDiv.scrollTop >= myDiv.scrollHeight) {
    scrolledToBottom(e);
  }
}

javascript auto scroll on bottom

const scrollToTop = () => {
  const scrollTopButton = document.getElementById('scrollTopButton');

  scrollTopButton.addEventListener('click', () => {
    window.scrollTo(0, document.body.scrollHeight);
  });
};