<!DOCTYPE HTML>
<html>
<head>
<style>
.droptarget { float: left; width: 100px; height: 35px; margin: 15px; margin-right: 100px; padding: 10px; border: 1px solid #aaaaaa;
}
</style>
</head>
<body>
<p>Drag the p element back and forth between the two rectangles:</p>
<div class="droptarget" ondrop="drop(event)" ondragenter="dragEnter(event)" ondragleave="dragLeave(event)" ondragover="allowDrop(event)"> <p ondragstart="dragStart(event)" draggable="true" id="dragtarget">Drag me!</p>
</div>
<div class="droptarget" ondragenter="dragEnter(event)" ondragleave="dragLeave(event)" ondrop="drop(event)" ondragover="allowDrop(event)"></div>
<p style="clear:both;" id="demo"></p>
<script>
function dragStart(event) { event.dataTransfer.setData("Text", event.target.id);
}
function dragEnter(event) { if ( event.target.className == "droptarget" ) { event.target.style.border = "3px dotted red"; document.getElementById("demo").innerHTML = "Entered the dropzone"; }
}
function dragLeave(event) { if ( event.target.className == "droptarget" ) { event.target.style.border = ""; document.getElementById("demo").innerHTML = "Left the dropzone"; }
}
function allowDrop(event) { event.preventDefault();
}
function drop(event) { event.preventDefault(); let data = event.dataTransfer.getData("Text"); event.target.appendChild(document.getElementById(data));
}
</script>
</body>
</html>