拖拽效果
通过javascript实现网页中鼠标按住拖动的效果。
网页效果
微信截图_20250401160209.png
代码展示
<html lang="zh">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>鼠标托拽效果</title>
<style>
* {
margin: 0;
padding: 0;
}
html,
body {
width: 100%;
height: 100%;
}
html {
font-size: 10px;
}
.box {
width: 50rem;
height: 30rem;
background-color: red;
position: relative;
}
</style>
</head>
<body>
<div class="box" id="box"></div>
<script>
let box = document.getElementById("box");
box.onmousedown = function (e) {
let offsetX = e.offsetX;
let offsetY = e.offsetY;
console.log(offsetX, "offsetX");
console.log(offsetY, "offsetY");
document.onmousemove = function (e2) {
let clientX = e2.clientX;
let clientY = e2.clientY;
console.log(clientX, "clientX");
console.log(clientY, "clientY");
_left = clientX - offsetX;
_top = clientY - offsetY;
console.log(_left, "left");
console.log(_top, "top");
if (_left < 0) {
_left = 0;
}
if (_top < 0) {
_top = 0;
}
if (_left > document.documentElement.clientWidth - box.offsetWidth) {
_left = document.documentElement.clientWidth - box.offsetWidth;
}
if (_top > document.documentElement.clientHeight - box.offsetHeight) {
_top = document.documentElement.clientHeight - box.offsetHeight;
}
box.style.left = _left + "px";
box.style.top = _top + "px";
}
}
document.onmouseup = function () {
document.onmousemove = null;
}
</script>
</body>
</html>