How to handle drag and drop functionality in native HTML
Aug 03, 2025 pm 02:36 PM
<p> Handling drag and drop in native HTML is simpler than you might think — you don't need JavaScript libraries or frameworks to get basic functionality working. With just a few HTML attributes and some JavaScript event listeners, you can enable independent drag-and-drop interactions.
<p> Here's how to implement drag and drop using only native HTML and a bit of JavaScript (which is required for full control, since pure HTML alone doesn't handle logic).
? Make an Element Draggable
<p> To make any element draggable, use thedraggable attribute:
<div draggable="true">Drag me!</div><p> By default, text elements like
<img src="/static/imghw/default1.png" data-src="https://img.php.cn/upload/article/000/000/000/175420296420819.jpeg" class="lazy" alt="How to handle drag and drop functionality in native HTML" > and <a> are draggable in most browsers, but for other elements (like <div> , <p> , etc.), you must explicitly set draggable="true" .? Set Up a Drop Zone
<p> Any element can act as a drop target. You need to listen for three main events:-
dragover– required to allow dropping (prevent default to enable drop) -
dragenter– optional, for visual feedback -
drop– where you handle the actual drop logic
<div id="drop-zone" ondragover="allowDrop(event)" ondrop="handleDrop(event)"> Drop here </div><p> And the JavaScript:
function allowDrop(event) {
event.preventDefault(); // Crucial: allows drop
}
function handleDrop(event) {
event.preventDefault();
const data = event.dataTransfer.getData("text/plain");
event.target.innerHTML = "Dropped: " data;
}?? Handle Drag Events
<p> You'll need to set upondragstart to define what data is being dragged: <div draggable="true"
ondragstart="event.dataTransfer.setData('text/plain', 'Hello World')">
Drag me!
</div><p> Or using JavaScript (cleaner for multiple elements): document.getElementById("drag-item").addEventListener("dragstart", function(e) {
e.dataTransfer.setData("text/plain", "Item 1");
});<p> ? ThedataTransferobject holds the dragged data. UsesetData(format, data)to store it.
? Full Working Example
<!DOCTYPE html>
<html>
<head>
<style>
.draggable {
padding: 10px;
background: #007cba;
color: white;
margin: 10px;
cursor: move;
}
#drop-zone {
width: 200px;
height: 100px;
border: 2px dashed #ccc;
padding: 10px;
margin: 20px 0;
}
</style>
</head>
<body>
<div class="draggable"
draggable="true"
ondragstart="event.dataTransfer.setData('text/plain', 'My draggable content')">
Drag me
</div>
<div id="drop-zone"
ondragover="event.preventDefault()"
ondrop="handleDrop(event)">
Drop here
</div>
<script>
function handleDrop(event) {
event.preventDefault();
const data = event.dataTransfer.getData("text/plain");
event.target.textContent = data;
}
</script>
</body>
</html>? Key Notes
- Always call
preventDefault()indragoveranddrop— otherwise, the drop won't work. - You can transfer different data types:
"text/plain","text/uri-list", or even custom formats. - For more complex use cases (like dragging files or multiple items), you'll expand on
dataTransfer. - Touch devices have limited native drag support — consider libraries for mobile compatibility.
<p> Basically, native HTML drag and drop isn't hard once you know the event flow:
dragstart → dragover → drop .
Just set
draggable , handle dragstart to set data, allow dragover , and process the drop.The above is the detailed content of How to handle drag and drop functionality in native HTML. For more information, please follow other related articles on the PHP Chinese website!
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