CSS Grid Implicit vs Explicit Tracks

CSS Grid Implicit vs Explicit Tracks Wes Bos

HTML

<link rel="stylesheet" href="https://cdn.rawgit.com/wesbos/css-grid/master/assets/style.css">
<div class="container">
  <div class="item">1</div>
  <div class="item">2</div>
  <div class="item">3</div>
  <div class="item">4</div>
  <div class="item">5</div>
  <div class="item">6</div>
  <div class="item">7</div>
  <div class="item">8</div>
</div>

CSS

.container {
  display: grid;
  grid-gap: 20px;
  grid-template-columns: 200px 400px;
  grid-template-rows: 50px 100px;
  grid-auto-rows: 100px;
  grid-auto-columns: 100px;
}