Assignment 7

Drag and Drop

by vzufelt

HTML

<html>
<head>
<style>
.droptarget {
  float: left; 
  width: 100px; 
  height: 35px;
  margin: 15px;
  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">
  <p draggable="true" id="dragtarget">Horde</p>
</div>

<div class="droptarget"></div>

<div class="droptarget2">
  <p draggable="true" id="dragtarget2">Alliance</p>
</div>

<div class="droptarget2"></div>

<br><br><p id="demo"></p>

<script>
</script>

</body>
</html>

JavaScript

document.addEventListener("dragstart", function(event) {
 
  event.dataTransfer.setData("Text", event.target.id);
 
  document.getElementById("demo").innerHTML = "Started to drag the p element.";

  event.target.style.opacity = "0.4";
});

document.addEventListener("drag", function(event) {
  document.getElementById("demo").style.color = "red";
});

document.addEventListener("dragend", function(event) {
  document.getElementById("demo").innerHTML = "Finished dragging the p element.";
  event.target.style.opacity = "1";
});

document.addEventListener("dragenter", function(event) {
  if ( event.target.className == "droptarget" ) {
    event.target.style.border = "3px dotted red";
  }
});

document.addEventListener("dragover", function(event) {
  event.preventDefault();
});

document.addEventListener("dragleave", function(event) {
  if ( event.target.className == "droptarget" ) {
    event.target.style.border = "";
  }
});

document.addEventListener("drop", function(event) {
  event.preventDefault();
  if ( event.target.className == "droptarget" ) {
    document.getElementById("demo").style.color = "";
    event.target.style.border = "";
    var data = event.dataTransfer.getData("Text");
    event.target.appendChild(document.getElementById(data));
  }
});