CSS 网格未按预期工作(网格区域)

Question

有人能帮我弄清楚为什么下面的CSS Grid示例不能按预期工作吗？这是 Codepen 的链接：

.cards {
  margin: 0;
  padding: 1em;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  grid-gap: 20px;
  grid-template-areas:
    "a a b"
    "c d d"
    "c e e";
}
.card {
  background-color: #1E88E5;
  padding: 2em;
  color: #FFFFFF;
  line-height: 1.4;
  border-radius: 4px;
}
.card1 { grid-area: "a"; }
.card2 { grid-area: "b"; background-color: #4CAF50; }
.card3 { grid-area: "c"; background-color: #FFCA28; }
.card4 { grid-area: "d"; background-color: #F06292; }
.card5 { grid-area: "e"; background-color: #FF8A80; }

由于某种原因，网格区域结构不正确。可能我忘记了什么，但我无法弄清楚到底是什么。任何帮助，不胜感激。谢谢！

Answer 1

只需从grid-area值中删除引号：

.card1 { grid-area: a; }
.card2 { grid-area: b; background-color: #4CAF50; }
.card3 { grid-area: c; background-color: #FFCA28; }
.card4 { grid-area: d; background-color: #F06292; }
.card5 { grid-area: e; background-color: #FF8A80; }

body {
  text-align: center;
}
.wrap {
  max-width: 70em;
  text-align: left;
  margin: 0 auto;
}
.cards {
  margin: 0;
  padding: 1em;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  grid-gap: 20px;
  grid-template-areas:
    "a a b"
    "c d d"
    "c e e";
}
.card {
  background-color: #1E88E5;
  padding: 2em;
  color: #FFFFFF;
  line-height: 1.4;
  border-radius: 4px;
  
  h3 {
    margin-top: 0;
  }
}
.card1 { grid-area: a; }
.card2 { grid-area: b; background-color: #4CAF50; }
.card3 { grid-area: c; background-color: #FFCA28; }
.card4 { grid-area: d; background-color: #F06292; }
.card5 { grid-area: e; background-color: #FF8A80; }

<div class="wrap">
  <div class="cards">
    <div class="card card1"><h3>Card 1</h3>Leverage agile frameworks to provide a robust synopsis for high level overviews. Iterative approaches to corporate strategy foster collaborative thinking to further the overall value proposition. Organically grow the holistic world view of disruptive innovation via workplace diversity and empowerment.</div>
    <div class="card card2"><h3>Card 2</h3>Bring to the table win-win survival strategies to ensure proactive domination. At the end of the day, going forward, a new normal that has evolved from generation X is on the runway heading towards a streamlined cloud solution.</div>
    <div class="card card3"><h3>Card 3</h3>At the end of the day, going forward, a new normal that has evolved from generation X is on the runway heading towards a streamlined cloud solution. User generated content in real-time will have multiple touchpoints for offshoring. Capitalize on low hanging fruit to identify a ballpark value added activity to beta test.</div>
    <div class="card card4"><h3>Card 4</h3>Override the digital divide with additional clickthroughs from DevOps. Nanotechnology immersion along the information highway will close the loop on focusing solely on the bottom line. At the end of the day, going forward, a new normal that has evolved from generation X is on the runway heading towards a streamlined cloud solution.</div>
    <div class="card card5"><h3>Card 5</h3>Organically grow the holistic world view of disruptive innovation via workplace diversity and empowerment. Bring to the table win-win survival strategies to ensure proactive domination.</div>
  </div>
</div>