HTML事件屬性ondragenter
HTML事件屬性ondragenter
觸發(fā)ondragenter
屬性事件當(dāng)可拖動(dòng)元素或文本選擇輸入有效的放置目標(biāo)時(shí)。
要使元素可拖動(dòng),請(qǐng)標(biāo)記該元素與全局HTML5draggable
屬性。
默認(rèn)情況下,鏈接和圖像是可拖動(dòng)的。
在draggable源元素上觸發(fā)的事件:
- ondragstart - starting dragging
- ondrag - during the dragging
- ondragend - finish dragging
投放目標(biāo)上觸發(fā)的事件:
- ondragenter - when the dragged element enters the droppable target
- ondragover - when the dragged element is over the droppable target
- ondragleave - when the dragged element leaves the droppable target
- ondrop - when the dragged element is dropped on the droppable target
HTML5中的新功能
ondragenter
屬性是HTML5中的新特性。
句法
<element ondragenter="script">
支持的標(biāo)簽
所有HTML元素
瀏覽器兼容性
ondragenter | Yes | 9.0 | Yes | Yes | Yes |
例子
<!DOCTYPE HTML>
<html>
<head>
<style>
.droptarget {float:left;width: 100px;height: 35px;margin: 15px;padding: 10px;border: 1px solid red;
}
</style>
</head>
<body>
<div class="droptarget" ondrop="drop(event)" ondragenter="dragEnter(event)"
ondragover="allowDrop(event)">
<p ondragstart="dragStart(event)"
ondrag="dragging(event)"
draggable="true"
id="dragtarget">Drag me!</p>
</div>
<div class="droptarget"
ondrop="drop(event)" ondragover="allowDrop(event)"></div>
<script>
function dragStart(event) {
event.dataTransfer.setData("Text", event.target.id);
}
function dragEnter(event) {
console.log("enter");
}
function dragging(event) {
console.log("being dragged");
}
function allowDrop(event) {
event.preventDefault();
}
function drop(event) {
event.preventDefault();vardata = event.dataTransfer.getData("Text");
event.target.appendChild(document.getElementById(data));
console.log("dropped");
}
</script>
</body>
</html>
Click to view the demo