<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>拖拽盒子</title>
<style>
body {
height: 100%;
}
div {
position: absolute;
left: 0;
right: 0;
width: 200px;
height: 200px;
background-color: lightskyblue;
}
</style>
</head>
<body>
<div></div>
<script>
var div = document.querySelector('div');
div.addEventListener('mousedown', function (e) {
var x = e.pageX - div.offsetLeft;
var y = e.pageY - div.offsetTop;
document.addEventListener('mousemove', move);
function move(e1) {
div.style.left = (e1.pageX - x) + 'px';
div.style.top = (e1.pageY - y) + 'px';
}
document.addEventListener('mouseup', function () {
document.removeEventListener('mousemove', move);
});
});
</script>
</body>
</html>