Property grid-column

A shorthand property for the grid-column-start
and the grid-column-end properties

This property is specified as one or two
values.
If two values are given, they are
separated by /.

#grid {
  display: grid;
  height: 100px;
  grid-template-columns: repeat(6, 1fr);
  grid-template-rows: 100px;
}

#item2 {
  background-color: yellow;
  grid-column: 2 / 4;
}