Draggable DIV, scrollable DIV

drag div:

https://www.w3schools.com/howto/howto_js_draggable.asp

scrollable div:

window.onscroll = function (e) {
  var vertical_position = 0;
  if (pageYOffset)//usual
    vertical_position = pageYOffset;
  else if (document.documentElement.clientHeight)//ie
    vertical_position = document.documentElement.scrollTop;
  else if (document.body)//ie quirks
    vertical_position = document.body.scrollTop;

  var your_div = document.getElementById('some_div');
  your_div.style.top = (vertical_position + 200) + 'px';//200 is arbitrary.. just to show you could now position it how you want
}

https://stackoverflow.com/questions/5616335/moving-div-with-scroll

https://www.w3schools.com/cssref/css3_pr_mediaquery.asp