完全拖动元素时，JavaScript中哪个事件发生？
ondragend 事件触发器，当元件被完全拖动。
示例
您可以尝试运行以下代码，以了解如何在JavaScript中实现ondragend 事件。
<!DOCTYPE HTML>
<html>
<head>
<style>
.drag {
float: left;
width: 100px;
height: 35px;
border: 2px dashed #876587;
margin: 15px;
padding: 10px;
}
</style>
</head>
<body>
<div class="drag" ondrop = "drop(event)" ondragover = "dropNow(event)">
<p ondragstart = "dragStart(event)" ondragend = "dragEnd(event)" draggable = "true" id = "dragtarget">Drag!</p>
</div>
<div class = "drag" ondrop = "drop(event)" ondragover = "dropNow(event)"></div>
<div id = "box"></div>
<p>Drag the left box to the right or drag the right box to the left.</p>
<script>
function dragStart(event) {
event.dataTransfer.setData("Text", event.target.id);
}
function dropNow(event) {
event.preventDefault();
}
function dragEnd(event) {
document.getElementById("box").innerHTML = "拖完了！";
}
function drop(event) {
event.preventDefault();
var data = event.dataTransfer.getData("Text");
event.target.appendChild(document.getElementById(data));
document.getElementById("box").innerHTML = "元素成功删除！";
}
</script>
</body>
</html>