W3Schools Tryit Editor

<!DOCTYPE HTML>
<html>
<head>
<style>
.droptarget {
  float: left; 
  width: 100px; 
  height: 35px;
  margin: 15px;
  padding: 10px;
  border: 1px solid #aaaaaa;
}
</style>
</head>
<body>
<h1>HTML DOM Events</h1>
<h2>The ondragstart Event</h2>

<p>This example uses the HTML DOM to assign "ondragstart", "ondragend", "ondragover" and "ondrop" events to the document object.</p>

<p>Drag the p element back and forth between the two rectangles:</p>

document.ondragend = function(event) {
  document.getElementById("demo").innerHTML = "Finished dragging the p element.";
};

/* Events fired on the drop target */
document.ondragover = function(event) {
  event.preventDefault();
};

document.ondrop = function(event) {
  event.preventDefault();
  if ( event.target.className == "droptarget" ) {
    var data = event.dataTransfer.getData("Text");
    event.target.appendChild(document.getElementById(data));
  }
};
</script>

</body>

</html>

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<!DOCTYPE HTML><html><head><style>.droptarget {  float: left;   width: 100px;   height: 35px;  margin: 15px;  padding: 10px;  border: 1px solid #aaaaaa;}</style></head><body><h1>HTML DOM Events</h1><h2>The ondragstart Event</h2>​<p>This example uses the HTML DOM to assign "ondragstart", "ondragend", "ondragover" and "ondrop" events to the document object.</p>​<p>Drag the p element back and forth between the two rectangles:</p>​<div class="droptarget">  <p draggable="true" id="dragtarget">Drag me!</p></div>​<div class="droptarget"></div>​<p id="demo"></p>​<script>/* Events fired on the drag target */document.ondragstart = function(event) {  event.dataTransfer.setData("Text", event.target.id);  document.getElementById("demo").innerHTML = "Started to drag the p element.";};​document.ondragend = function(event) {  document.getElementById("demo").innerHTML = "Finished dragging the p element.";};​/* Events fired on the drop target */document.ondragover = function(event) {  event.preventDefault();};