flex容器常用的四个属性 -

flex-flow: 设置主轴的方向和项目在主轴的换行方式
justify-content: 项目在主轴的对齐方式
align-items: 项目在交叉轴上的对齐方式
align-content: 设置项目在多行容器中的对齐方式

代码实例:

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>实例演示:flex容器常用的四个属性</title>
    <style>
      * {
        box-sizing: border-box;
      }
      .container {
        height: 15em;
        border: 1px solid coral;
        padding: 1em;
        margin: 1em;
        display: flex;
      }
      .container > .item {
        width: 8em;
        background-color: lightyellow;
        border: 1px solid chocolate;
      }
      .container {
        flex-flow: row nowrap;
        flex-flow: row wrap;
      }
      /* .container {
        flex-flow: column nowrap;
        flex-flow: column wrap;
        flex-flow: column wrap-reverse;
        height: 8em;
      } */
      .container {
        justify-content: flex-start;
        justify-content: flex-end;
        justify-content: flex-end;
        justify-content: center;
        justify-content: space-between;
        justify-content: space-around;
        justify-content: space-evenly;
      }
      .container {
        flex-flow: row nowrap;
        align-items: stretch;
        align-items: flex-start;
        align-items: flex-end;
        align-items: center;
      }
      /.container {
        flex-flow: row wrap;
        align-content: stretch;
        align-content: flex-end;
        align-content: flex-start;
        align-content: center;
        align-content: space-around;
        align-content: space-between;
        align-content: space-evenly;
      }
    </style>
  </head>
  <body>
    <div class="container">
      <div class="item">item1</div>
      <div class="item">item2</div>
      <div class="item">item3</div>
      <div class="item">item4</div>
      <div class="item">item5</div>
      <div class="item">item6</div>
      <div class="item">item7</div>
      <div class="item">item8</div>
    </div>
  </body>
</html>