How to get the distance from the top for an element?

Question

I want to know how to use JavaScript to get the distance of an element from the top of the page not the parent element.

Answer 1

Here is some interesting code for you :)

window.addEventListener('load', function() {
  //get the element
  var elem = document.getElementById('test');
  //get the distance scrolled on body (by default can be changed)
  var distanceScrolled = document.body.scrollTop;
  //create viewport offset object
  var elemRect = elem.getBoundingClientRect();
  //get the offset from the element to the viewport
  var elemViewportOffset = elemRect.top;
  //add them together
  var totalOffset = distanceScrolled + elemViewportOffset;
  //log it, (look at the top of this example snippet)
  document.getElementById('log').innerHTML = totalOffset;
});

#test {
  width: 100px;
  height: 100px;
  background: red;
  margin-top: 100vh;
}
#log {
  position: fixed;
  top: 0;
  left: 0;
  display: table;
  background: #333;
  color: #fff;
}
html,
body {
  height: 2000px;
  height: 200vh;
}

<div id="log"></div>
<div id="test"></div>