<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1">
<title></title>
<script src="jquery-3.5.1.min.js" type="text/javascript" charset="utf-8"></script>
<style type="text/css">
#box1 {
background-color: yellow;
height: 200px;
width: 200px;
}
#box2 {
background-color: red;
height: 100px;
width: 100px;
position: relative;
margin-top: 50px;
left: 50px;
}
</style>
<script type="text/javascript">
$(document).ready(function() {
// 只能获取不能设置
$("#o-left-set").click(function() {
$("#box2").offset().left = 30;
});
// 距离页面最左侧的距离 和有没有定位没有关系
$("#o-left-get").click(function() {
$("#p1").text("offset().left获取" + $("#box2").offset().left);
});
$("#p-left-get").click(function() {
$("#p2").text("position().left获取" + $("#box2").position().left);
});
$("#o-top-get").click(function() {
$("#p3").text("offset().top获取" + $("#box2").offset().top);
});
$("#p-top-get").click(function() {
$("#p4").text("position().top获取" + $("#box2").position().top);
});
});
</script>
</head>
<body>
<button type="button" id="o-left-set">offset().left设置</button>
<button type="button" id="o-left-get">offset().left获取</button>
<button type="button" id="p-left-get">position().left获取</button>
<button type="button" id="o-top-get">offset().top获取</button>
<button type="button" id="p-top-get">position().top获取</button>
<div id="box1">
<div id="box2">
</div>
</div>
<p id="p1"></p>
<p id="p2"></p>
<p id="p3"></p>
<p id="p4"></p>
</body>
</html>
