html 用于嵌入宽高比为16：9的视频的纯CSS解决方案

Posted 2021-05-10

.video-container {
  position: relative;
  padding-bottom: 56.25%; /*16:9*/
  padding-top: 30px; 
  height: 0; 
  overflow: hidden;
}
 
.video-container iframe,
.video-container object,
.video-container embed {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

<div class="video-container">
  <iframe width="640" height="360" src="//www.youtube.com/embed/ukKd8W3Bvo0" frameborder="0" allowfullscreen></iframe>
</div>