function elementInViewport(myElement) {
  const myElementHeight = myElement.offsetHeight;
  const myElementWidth = myElement.offsetWidth;

  const bounding = myElement.getBoundingClientRect();

  if (
    bounding.top >= -myElementHeight &&
    bounding.left >= -myElementWidth &&
    bounding.right <=
      (window.innerWidth || document.documentElement.clientWidth) +
        myElementWidth &&
    bounding.bottom <=
      (window.innerHeight || document.documentElement.clientHeight) +
        myElementHeight
  ) {
    return true;
  } else {
    return false;
  }
}