Example

by kayenglajom

HTML

<!-- Learn about this code on MDN: https://developer.mozilla.org/en-US/docs/Web/CSS/grid-column -->

<div id="grid">
  <div id="item1"></div>
  <div id="item2"></div>
  <div id="item3"></div>
</div>

CSS

#grid {
  display: grid;
  height: 100px;
  grid-template-columns: repeat(9
 , 1fr);
  grid-template-rows: 100px;
}

#item1 {
  background-color: lime;
}

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

#item3 {
  background-color: blue;
  grid-column: span 2 / 7;
}