<style>
*{
margin: 0px;
padding: 0px;
}
.div1,.div2{
width: 200px;
height: 200px;
}
.div1{
background-color: aqua;
}
.div2{
background-color: lavenderblush;
}
.outer{
position: relative;
}
</style>
</head>
<body>
<div class="div1"></div>
<div class="outer">
<div class="div2"></div>
</div>
<script src="jquery-3.3.1.min.js"></script><!--不加此句$不识别-->
<script>
offset相对于视口的偏移量
console.log($(".div1").offset().top)//offset有2个属性。top和。left
position相对于已经定位的父的偏移量
console.log($(".div1").position().top)//position也是.top和.left
console.log($(".div2").position().top)//position也是.top和.left，outer加了position relative所以positionwwei 0
$(".div1").height("1000px")
</script>
</body>
</html>
