[CSS] Control Image Aspect Ratio Using CSS (object-fit)

Resize images and videos to fill their parent and maintain their aspect ratio with pure CSS. The new object-fit and object-position properties allow you to scale images and videos, much like you could with background-size and background-position.

img {
  width: 90vw;
  height: 75vh;
  border: 3px solid tomato;
}

.img-con1 img{
    object-fit: fill;
}
.img-con2 img{
  object-fit: contain;
}
.img-con3 img{      
  object-fit: cover;
}
.img-con4 img{
  object-fit: none;
}

.img-con5 img{
  object-fit: scale-down;
}

.img-con6 img{
  object-fit: fill;
  object-position: 20px 5px;
}


/* Demo styles only */
* {
  box-sizing: border-box;
}

body {
  margin: 0;
}

原文地址:https://www.cnblogs.com/Answer1215/p/6002203.html