在html使用類似background-size的效果

http://www.zhangxinxu.com/wordpress/2015/03/css3-object-position-object-fit/

.box { width: 160px; height: 160px; margin: 10px 0 20px; background-color: #beceeb; overflow: hidden; resize: both; }
.box > img {width: 100%; height: 100%; background-color: #cd0000;}
.fill { object-fit: fill; }
.contain { object-fit: contain; }
.cover { object-fit: cover; }
.none { object-fit: none; }
.scale-down { object-fit: scale-down; }