:scope

The :scope CSS pseudo-class represents elements that are a reference point for selectors to match against.

/* Selects a scoped element */
:scope {
  background-color: lime;
}

Currently, when used in a stylesheet, :scope is the same as :root, since there is not at this time a way to explicitly establish a scoped element. When used from a DOM API such as querySelector(), querySelectorAll(), matches(), or Element.closest(), :scope matches the element on which the method was called.

Syntax

:scope

Examples

Identity match

In this simple example, we demonstrate that using the :scope pseudo-class from the Element.matches() method matches the element on which it's called.

JavaScript

const paragraph = document.getElementById("para");
const output = document.getElementById("output");

if (paragraph.matches(":scope")) {
  output.textContent = "Yep, the element is its own scope as expected!";
}

HTML

<p id="para">
  This is a paragraph. It is not an interesting paragraph. Sorry about that.
</p>
<p id="output"></p>

Result

Direct children

A situation where the :scope pseudo-class prove to be useful is when you need to get direct descendant of an already retrieved Element.

JavaScript

const context = document.getElementById("context");
const selected = context.querySelectorAll(":scope > div");

document.getElementById("results").innerHTML = Array.prototype.map
  .call(selected, (element) => `#${element.getAttribute("id")}`)
  .join(", ");

HTML

<div id="context">
  <div id="element-1">
    <div id="element-1.1"></div>
    <div id="element-1.2"></div>
  </div>
  <div id="element-2">
    <div id="element-2.1"></div>
  </div>
</div>
<p>
  Selected elements ids :
  <span id="results"></span>
</p>

Result

Specifications

Specification
Selectors Level 4
# the-scope-pseudo

Browser compatibility

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See also