W3Schools Tryit Editor

<!DOCTYPE HTML>
<html>
<head>
<style>
#droptarget {
  float: left; 
  width: 200px; 
  height: 45px;
  margin: 55px;
  margin-top: 155px;
  padding: 10px;
  border: 1px solid #aaaaaa;
}
</style>
</head>
<body>

<p>This example uses the addEventListener() method to attach a "dragstart" and "drag" event to a p element, and a "dragover" and "drop" event to a div element.</p>

<p draggable="true" id="dragtarget">Drag me into the rectangle!</p>

<p style="clear:both;"><strong>Note:</strong> drag events are not supported in Internet Explorer 8 and earlier versions or Safari 5.1 and earlier versions.</p>

/* Events fired on the drag target */

drag.addEventListener("dragstart", function(event) {
  event.dataTransfer.setData("Text", event.target.id);
});

drag.addEventListener("drag", function(event) {
  document.getElementById("demo").innerHTML = "The p element is being dragged.";
});

/* Events fired on the drop target */
drop.addEventListener("dragover", function(event) {
  event.preventDefault();
  document.getElementById("demo").innerHTML = "The p element is OVER the droptarget.";
  event.target.style.border = "4px dotted purple";
});

drop.addEventListener("drop", function(event) {
  event.preventDefault();
  var data = event.dataTransfer.getData("Text");
  event.target.appendChild(document.getElementById(data));
  document.getElementById("demo").innerHTML = "The p element was dropped.";
});
</script>

</body>

</html>