实例演示四种上下文选择器的使用场景
实例演示四种上下文选择器的四种使用场景
1.父[]子选择器
>
程序
<!DOCTYPE html>
<html lang="zh-CN">
<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>实例演示上下文选择器的四种使用场景</title>
</head>
<body>
<ul class="list">
<li class="item">item1</li>
<li class="item">item2</li>
<li class="item">item3</li>
<li class="item">item4</li>
<li class="item">item5</li>
<li class="item">item6</li>
</ul>
<style>
.list > .item {
border: 1px solid #000;
}
</style>
</body>
</html>
web显示
2.后代选择器
空格
程序
<ul class="list">
<ul class="list">
<li class="item">item1</li>
<li class="item">item2</li>
<li class="item">
item3
<ul>
<li class="item">item3-1</li>
<li class="item">item3-2</li>
<li class="item">item3-3</li>
<li class="item">item3-4</li>
<li class="item">item3-5</li>
</ul>
</li>
<li class="item">item4</li>
<li class="item">item5</li>
<li class="item">item6</li>
</ul>
</ul>
<style>
.list .item {
border: 1px solid #000;
}
</style>
</body>
</html>
web页面
3.兄弟
+
程序:
<li class="item four">item4</li>
<li class="item">item5</li>
<li class="item">item6</li>
</ul>
</ul>
<style>
.list > .item.four +.item{
background-color: blueviolet ;
}
</style>
</body>
</html>
或
</li>
<li class="item four">item4</li>
<li class="item">item5</li>
<li class="item">item6</li>
</ul>
</ul>
<style>
.list > .item.four + *{
background-color: blueviolet ;
}
</style>
</body>
</html>
web页面
4同级的所有
~
<body>
<ul class="list">
<ul class="list">
<li class="item">item1</li>
<li class="item">item2</li>
<li class="item three">item3</li>
<li class="item ">item4</li>
<li class="item">item5</li>
<li class="item">item6</li>
</ul>
</ul>
<style>
.list > .item.three ~ *{
background-color: blueviolet ;
}
</style>
</body>
</html>
程序: