flex实现多行多列-内容单行或者2行-超过2行显示省略号

一个学生问到的问题

效果

代码

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <style>
    * {
      margin: 0px;
      padding: 0px;
    }
    ul {
      width: 600px;
      height: 200px;
      background-color: pink;

      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-around;
    }
    li {
      list-style: none;
      height: 60px;
      line-height: 20px;
      padding: 10px;
      width: 180px;
      box-sizing: border-box;
      /* border: 2px blue solid; */
      background-color: #dfdfdf;
      border-radius: 30px;
      text-align: center;
      display: flex;
      align-items: center;
    }

    .box {
      display: table;
      width: 160px;
      /* border: 2px blue dashed; */
    }
    .wrap {
      letter-spacing: 0;
      overflow: hidden;
      display: -webkit-box;
      text-overflow: ellipsis;
      -webkit-line-clamp: 2;   
      -webkit-box-orient: vertical;
      font-size:12px;
    }
  </style>
  <body>
    <ul>
      <li>
        <div class="box">
          <div class="wrap">我是文字随便几行我可以自动折行,水平居中多了不显示多了不显示多了不显示</div>
        </div>
      </li>
      <li>
        <div class="box">
          <div class="wrap">水平居中</div>
        </div>
      </li>
      <li>
        <div class="box">
          <div class="wrap">我是文字随便几行我可以自动折行,水平居中</div>
        </div>
      </li>
      <li>
        <div class="box">
          <div class="wrap">我是文字随便几行我可以自动折行,水平居中</div>
        </div>
      </li>
      <li>
        <div class="box">
          <div class="wrap">我是文字随便几行我可以自动折行,水平居中</div>
        </div>
      </li>
      <li>
        <div class="box">
          <div class="wrap">我是文字随便几行我可以自动折行,水平居中</div>
        </div>
      </li>
      <li>
        <div class="box">
          <div class="wrap">我是文字随便几行我可以自动折行,水平居中</div>
        </div>
      </li>
      <li>
        <div class="box">
          <div class="wrap">我是文字随便几行我可以自动折行,水平居中</div>
        </div>
      </li>
      <li>
        <div class="box">
          <div class="wrap">我是文字随便几行我可以自动折行,水平居中</div>
        </div>
      </li>
    </ul>
  </body>
</html>