效果展示
屏幕截图 2025-03-28 200737.png
代码演示
<html lang="zh">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>鼠标拖拽效果</title>
<style>
#box{
width: 300px;
height: 200px;
background-color: red;
position: absolute;
}
</style>
</head>
<body>
<div id="box"></div>
<script>
let box = document.getElementById("box")
box.onmousedown = function(e) {
let ox = e.offsetX
let oy = e.offsetX
// 在浏览器中获取宽高document
document.onmousemove = function(e2) {
let cx = e2.clientX
let cy = e2.clientY
let _left = cx - ox
let _top = cy - oy
//边界判断
if(_left<0){
_left = 0
}
if(_top<0){
_top = 0
}
if(_top>document.documentElement.clientHeight-box.offsetHeight){
_top = document.documentElement.clientHeight-box.offsetHeight
}
if(_left>document.documentElement.clientWidth-box.offsetWidth){
_left = document.documentElement.clientWidth-box.offsetWidth
}
box.style.left = _left+"px"
box.style.top = _top+"px"
}
}
document.onmouseup = function() {
document.onmousemove = null
}
</script>
</body>
