:is()

The :is() pseudo-class takes a forgiving selector list and matches any element that can be selected by one of the selectors in that list. It works like the CSS :is() selector and is useful for writing compact selectors.

Syntax

:is(<forgiving-selector-list>)

The selector list is forgiving — any invalid selectors in the list are silently ignored rather than causing the entire selector to fail.

Examples

Compact selector lists

Without :is():

$ vlt query ':root > [name=react], :root > [name=vue], :root > [name=svelte]'

With :is():

$ vlt query ':root > :is([name=react], [name=vue], [name=svelte])'

Both queries produce the same result — direct dependencies named react, vue, or svelte.

Forgiving behavior

Invalid selectors in the list are ignored:

$ vlt query ':is([name=react], :nonexistent, [name=vue])'

This still matches react and vue — the :nonexistent pseudo-class is silently skipped.

See also

• :not() — negation pseudo-class
• :has() — dependency matching