CSS嵌套

 

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>css嵌套</title>
  </head>

  <body>
    <style>
      /* div {
        width: 300px;
        height: 300px;
        border: 1px solid #ccc;
        .bb {
          color: red;
        }
        #bb {
          background-color: bisque;
        }
      } */

      /* div {
        width: 300px;
        height: 300px;
        border: 1px solid #ccc;
        &:hover h2 {
          color: red;
        }
      } */

      /* div {
        width: 300px;
        height: 300px;
        border: 1px solid #ccc;
        &:has(h2:hover) {
          background: red;
        }
      } */
    </style>
    <!-- <div>
      <h2 class="bb" id="bb">hello world</h2>
    </div>
    <h2 class="bb" id="bb">你好世界</h2> -->

    <style>
      div {
        width: 300px;
        height: 300px;
        border: 1px solid #ccc;
        /* &:has(i:hover) {
          background: red;
        } */
        &:has(i) {
          background: red;
        }
      }
    </style>
    <div>
      <h2 class="bb" id="bb">
        <p>
          啊啊
          <span>
            牛逼啊
            <i>hello world</i>
          </span>
        </p>
      </h2>
    </div>
    <h2 class="bb" id="bb">你好世界</h2>
  </body>
</html>

 

posted @ 2023-10-12 15:08  web_cnblogs  阅读(16)  评论(0)    收藏  举报