The :is() Function

Pseudo-class

Selects any element that can be selected by one of the selectors in the given selector list.

Syntax for :is()

	Syntax
Selectors Level 4	:is( <forgiving-selector-list> )

Notes

• :is() and :where() are similar but :is() counts towards the specificity of the overall selector while :where() has a specificity of 0.

Recommended Links

• CanIUse.com: Search ":is()" (compatibility information)
• CanIEmail.com: Search ":is()" (email client compatibility information)
• Selectors Level 4: :is()
• MDN: :is() (:matches(), :any())

Search Engine Links (for more information)

• Bing "CSS is function"
• Google "CSS is function"