使用场景
一般用作图形的移动，如svg画图、dom元素的拖拽。。。
测试代码
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<title>Page Title</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" type="text/css" media="screen" href="main.css" />
<script src="main.js"></script>
<style>
body {
margin: 0px;
padding: 0px;
background: black;
}
.main {
width: 500px;
height: 500px;
background: yellow;
display: flex;
margin: 250px;
padding: 20px;
}
.target {
box-sizing: border-box;
margin: 20px;
padding: 100px;
width: 100px;
height: 100px;
background: red;
}
</style>
</head>
<body>
<div class="div1">
<div class="main">
<div class="target"></div>
</div>
</div>
</body>
<script>
var test = document.getElementsByClassName('div1')[0];
test.onclick = function (e) {
console.log(e)
}
</script>
</html>
图解 event.offsetX，event.clientX，event.pageX，event.screenX属性
test.png
