I can has() new CSS Selector?!

In this Hasty Treat, Scott and Wes talk about new CSS selectors :has, :where, and :is.

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Show Notes

• 00:25 Welcome
• 01:19 Sponsor: MagicBell
• 02:31 Sponsor: LogRocket
• 03:40 Don't say stupid
• 05:03 :Has
• MDN :Has

// Finds all p tags that have an anchor tag as a child
p:has(a) {}
// Can find children of parent as well
// Finds the button of a paragraph that contains an a tag 
p:has(a) button {}
// Finds all p tags that don't have an anchor tag as a child
p:not(:has(a)) {}
// Finds all p tags where a is a direct sibling
p:has(> a) {}
// would find <p><a>Hi</a></p>
// would not find <p><span><a>hi</a></span></p>

• 06:13 Jargon check
• 11:01 Some examples
• 13:25 Nest navigations
• 13:51 Can I use it?
• 15:52 Is and Where
• MDN :where

In the past we would write

header p:hover,
main p:hover,
footer p:hover {
  color: red;
  cursor: pointer;
}

:where is essentially a short had for making this easier considering the 2nd half of these selectors is the same. Will make your css dryer

:where(header, main, footer) p:hover {}

Also super handy in avoiding css blocks being ignored for unsupported features.

// Doesn't work
div:has(p), div:some_new_selector(p)

// Will still work for :has if has is supported
:where(div:has(p), div:some_new_selector(p))

• When to use :Where

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