可以更换事件，当鼠标按下，图标跟着鼠标移动
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
<style>
div{
width: 100px;
height: 100px;
background-color: #f0f;
position: absolute;
left:0;
top:0;
}
</style>
</head>
<body>
<h2>鼠标绑定盒子</h2>
<div id="div"></div>
<script>
// 逻辑：1.先获取鼠标的X,Y坐标
// 2.给div进行位置赋值 left，top
let div = document.getElementById('div')
document.onmousemove = function(e){
let event = e||window.event
// console.log(event)
div.style.left = event.clientX-div.clientWidth/2+'px';
div.style.top = event.clientY-div.clientHeight/2+'px';
}
</script>
</body>
</html>