CSS Grid not working in ie11 despite prefixes

Answer 1

IE does not have auto-flow of grid elements. You need to assign a specific grid position to each grid element, otherwise each non-placed element ends up stacked in 1,1.

.container {
  width: 100%;
  display: -ms-grid;
  display: grid;
  -ms-grid-columns: 1fr auto 1fr;
  grid-template-columns: 1fr auto 1fr;
}

.item1 {
  text-align: center;
  background: red;
  color: white;
  padding: 20px;
  -ms-grid-column: 1;
}

.item2 {
  text-align: center;
  background: green;
  color: white;
  padding: 20px;
  -ms-grid-column: 2;
}

.item3 {
  text-align: center;
  background: blue;
  color: white;
  padding: 20px;
  -ms-grid-column: 3;
}

<div class="container">

  <div class="item1">
    Item 1
  </div>

  <div class="item2">
    Item 2
  </div>

  <div class="item3">
    Item 3
  </div>

</div>