[CSS3] Using CSS Combinators to Identify Siblings and Descendants in CSS

开发者治博技术 2022年11月21日

0 收藏 734 点赞 3,136 浏览 869 个字

CSS combinators allows us to reference the DOM relationship between two or more elements in CSS.

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width">
  <title>Combinators</title>
</head>
<body>
  <section>
    <h1>H1 Content</h1>
    <h2>H2 Content</h2>
    <p>sub text subtext</p>
    <a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >Call to Action</a>
    <p>
      paragraph description paragraph description paragraph description paragraph description <a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >link in paragraph</a>
    </p>
    <a href="#" rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >Call to Action</a>
  </section>
</body>
</html>

section {
  border: 1px solid #ccc;
  width: 500px;
  padding-bottom: 10px;
}/* All the h1 inside section */
section h1 {
  background-color: #000;
  color: #fff;
  margin:;
  padding: 10px 5px;
}/* All a tags as direct child in section */
section > a {
  color: red;
}/*only descendants a tag of the section*/
section p > a {
  color: #000;
}/* the p tag next to h2 tag*/
section h2 + p {
  font-style: italic;
  margin-top: -15px;
}/* All the siblings after h1*/
section h1 ~ * {
  margin-left: 15px;
}