今天偶然发现 绝对定位子元素撑起了父元素的滚动高度,觉得很奇怪
上代码 ``
```<style>
.fathserDiv{
width: 100px;
height: 100px;
position: relative;
background-color: red;
}
.child{
position: absolute;
height: 300px;
width: 200px;
background-color: blue;
}
</style>
</head>
<body>
<div class="fathserDiv">
<div class="child">
</div>
</div>
</body>
```