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