Objective function
Code
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
div {
width: 200px;
height: 200px;
margin: 100px auto;
background-color: tomato;
}
</style>
</head>
<body>
<div></div>
<script>
var div = document.querySelector('div');
div.addEventListener('mousemove', function (e) {
var x = e.pageX - div.offsetLeft;
var y = e.pageY - div.offsetTop;
div.innerHTML = '鼠标的横坐标：' + x + '<br>鼠标的纵坐标：' + y;
});
</script>
</body>
</html>
