纯css3实现响应式布局grid网格布局

 今天学习了一下 grid 布局，不得不感叹它比 flex 布局更加强大，也更加的灵活。下面用 grid 实现了一个响应式布局。有错误的地方欢迎大家指正。

效果图：

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>css3 实现响应式布局 </title>
    <style>
      .item1 {
        background-color: aqua;
        grid-area: header;
      }
      .item2 {
        background-color: blueviolet;
        grid-area: nav;
      }
      .item3 {
        background-color: chocolate;
        grid-area: content;
      }
      .item4 {
        background-color: darkseagreen;
        grid-area: footer;
      }

      .container {
        width: 100%;
        min-height: 300px;
        display: grid;
        grid-template-columns: 1fr;
        /* fr 单位代表网格容器中可用空间的一等份。*/
        grid-template-rows: 50px auto 1fr 50px;
        grid-template-areas: "header" "nav" "content" "footer";
        grid-gap:10px;
      }
      @media (min-width: 300px) {
        .container {
          grid-template-columns: auto 1fr;
          grid-template-rows: 50px auto 50px;
          grid-template-areas: "nav header" "nav content" "nav footer";
        }
      }

      @media (min-width: 400px){
          .container{
              grid-template-columns: auto 1fr;
              grid-template-rows: 50px auto 50px;
              grid-template-areas: "header header" "nav content" "footer footer";
          }
      }
    </style>
  </head>
  <body>
    <section class="container">
      <div class="item1">header</div>
      <div class="item2">nav</div>
      <div class="item3">content</div>
      <div class="item4">footer</div>
    </section>
  </body>
</html>

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