scope
CSS :scope Pseudo Class
The CSS :scope pseudo-class represents elements that are a reference point for selectors.
The :scope is the same as :root since, at the moment, there is not a way to explicitly establish a scoped element.
Scope element is an element forming a context for a block of styles. （Scope元素是构成样式块的上下文的元素。）
Version
Version （版本）
Selectors Level 4 （选择器级别4）
Syntax
Syntax （语法）
:scope {
css declarations;
}
Example of the :scope selector:
<!DOCTYPE html>
<html>
<head>
<title>Title of the document</title>
<style>
.container {
margin: 40px auto;
max-width: 700px;
background-color: #eeeeee;
padding: 20px;
box-shadow: 0 0 4px rgba(0, 0, 0, 0.25);
}
section {
padding: 30px;
}
:scope {
background-color: #1c87c9;
}
</style>
</head>
<body>
<h2>:scope selector example</h2>
<div class="container">
<section>
<p>
Inside the scope.
（瞄准镜内。）
</p>
</section>
</div>
</body>
</html>