object fit cover

body {
  margin: 0;
}
img {
  display: block;
  width: 100vw;
  height: 100vh;
  object-fit: cover;
}object-fit: contain;overflow: 'hidden',
backgroundSize : 'contain',
img {
  width: 200px;
  height: 
  400px;
  object-fit: cover;
}