hr标签如何做成这种效果？

Question

Answer 1

<hr class="hr">.hr{&nbsp; &nbsp; position: relative;}.hr:after{&nbsp; &nbsp; content: "";&nbsp; &nbsp; position: absolute;&nbsp; &nbsp; top: 0;left: 0;right: 0;bottom: 0;&nbsp; &nbsp; margin: auto;&nbsp; &nbsp; display: block;&nbsp; &nbsp; border: 1px solid #ccc;&nbsp; &nbsp; height: 10px;&nbsp; &nbsp; width: 10px;&nbsp; &nbsp; background-color: #fff;}