:has-slotted

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

The :has-slottedCSSpseudo-class matches when the content of a <slot> element is not empty or not using the default value (see Using templates and slots for more information).

Note: Even a single whitespace text node is sufficient to make :has-slotted apply.

This only works when used inside CSS placed within a shadow DOM.

css
/* Selects the content of a <slot> element that has content that is not default */ :has-slotted { color: green; } /* Selects the content of a <slot> element that has no content or default */ :not(:has-slotted) { color: red; }

Syntax

css
:has-slotted { /* ... */ }

Examples

This example has two <slot> elements, one of which has been assigned some content and the other has not.

HTML

html
<p> <template shadowrootmode="open"> <style> :has-slotted { color: rebeccapurple; } </style> <slot name="one">Placeholder 1</slot> <slot name="two">Placeholder 2</slot> </template> <span slot="one">Slotted content</span> </p>

Result

The <slot> element that has been assigned content matched the :has-slotted pseudo-class and has the color value of rebeccapurple applied.

Specifications

Specification
CSS Scoping Module Level 1
# the-has-slotted-pseudo

Browser compatibility

See also