@charset "utf-8";
div {
  width: 400px;
  height: 400px;
  margin: 0 auto;
  float: left;
  border: 1px solid #f00;
}
div img {
  width: 100%;
  height: 100%;
}
.box1 {
  width: 200px;
  object-fit: fill;
}
.box2 {
  width: 200px;
  object-fit: cover;
}
.box3 {
  width: 200px;
  object-fit: contain;
}