HTML ondragstart Attribute: This attribute is defined as it fires when the user starts dragging an element. Links and images are draggable by default and do not need the draggable attribute. There are many event attributes that are used, and can occur, in the different stages of a drag and drop operation:
Events fired on the draggable target (the source element)
- ondragstart – fires when the user starts to drag an element
- ondrag – fires when an element is being dragged
- ondragend – fires when the user has finished dragging the element
HTML ondragstart Attribute
This attribute can be applied to all the HTML elements.
Events fired on the drop target
- ondragenter – fires when the dragged element enters the drop target
- ondragover – fires when the dragged element is over the drop target
- ondragleave – fires when the dragged element leaves the drop target
- ondrop – fires when the dragged element is dropped on the drop target
Browser Support
- Chrome-4.0
- Firefox-3.5
- Internet Explorer-9.0
- Safari-6.0
- Opera-12.0
Example: for <p> element
<!DOCTYPE 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" ondrop="drop(event)" ondragover="allowDrop(event)">
<p ondragstart="dragStart(event)" ondragend="dragEnd(event)" draggable="true" id="dragtarget">Drag me!</p>
</div>
<div class="droptarget" ondrop="drop(event)" ondragover="allowDrop(event)"></div>
<p style="clear:both;"></p>
<p id="demo"></p>
<script>
function dragStart(event) {
event.dataTransfer.setData("Text", event.target.id);
document.getElementById("demo").innerHTML = "Started to drag the p element";
}
function dragEnd(event) {
document.getElementById("demo").innerHTML = "Finished dragging the p element.";
}
function allowDrop(event) {
event.preventDefault();
}
function drop(event) {
event.preventDefault();
var data = event.dataTransfer.getData("Text");
event.target.appendChild(document.getElementById(data));
}
</script>
</body>
</html>
Output:
