<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
div {
width: 100px;
height: 100px;
text-align: center;
line-height: 100px;
border: 1px solid red;
margin-right: 15px;
}
</style>
</head>
<body>
<div class="d1" draggable="true">div1</div>
<div draggable="true" class="d2">div2</div>
<div draggable="true" class="d3">div3</div>
<div draggable="true" class="d4">div4</div>
<div draggable="true" class="d5">div5</div>
</body>
<script>
var div = document.getElementsByTagName('div')
var container = null; // 存放拖拽元素的容器
for (let i = 0; i < div.length; i++) {
// 开始拖拽时把元素用容器存放
div[i].ondragstart = function () {
container = this;
}
// 默认当我dragover的时候会阻止我做drop操作，这里取消默认事件
div[i].ondragover = function (e) {
e.preventDefault()
}
// 当拖动结束的时候，给拖动的div所在位置的下面的div做drop事件
div[i].ondrop = function () {
if (container != null && container != this) {
let temp = document.createElement('div')
document.body.replaceChild(temp, this)
document.body.replaceChild(this, container)
document.body.replaceChild(container, temp)
}
}
}
</script>
</html>