用javascript实现页面某个节点的拖拽

来源：互联网发布：rar怎么解压到mac 编辑：程序博客网时间：2024/04/26 13:03

主要利用onmousedown()、onmousemove()、onmouseup()三个事件，当鼠标按下，物体被选中，然后进行移动，可以在页面上向各个方向进行移动，当抬起鼠标时，物体停止移动

<!DOCTYPE>

<html>
<head>
<meta charset="utf-8">
<style type="text/css">
body {
padding: 0;
margin: 0;
}
#box {
width: 200px;
height:200px;
background-color:#ccc;
position: absolute;
cursor: pointer;
}
</style>
<script type="text/javascript">
window.onload = function(){
var box = document.getElementById("box");
box.onmousedown = function(e){
var e = e || window.event;
var diffX = e.clientX - box.offsetLeft;
var diffY = e.clientY - box.offsetTop;
document.onmousemove = function(e){
var e = e || window.event;
box.style.left = e.clientX - diffX + "px";
box.style.top = e.clientY - diffY + "px";
};
document.onmouseup = function(){
document.onmousemove = null;
document.onmousedown = null;
};
};

};
</script>
</head>
<body>
<div id="box"></div>
</body>
</html>

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