浮动元素将父级高度撑开

撑开父级

<div class="parent">
   <div class="child"></div>
</div>
    ```
    .parent{
        background: red;
        overflow: auto;//注意要用这个
    }
    .child{
        height: 100px;
        background: #000;
        width:100px;
        float:right;
    }

标签：浮动,parent,父级,float,100px,撑开,background
来源： https://blog.csdn.net/weixin_41254345/article/details/100594025