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Hi! I'm Kevin

CSS can count now!

Published about 2 hours ago • 3 min read

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Hello Reader,

Monday edition of the newsletter this week, as just got back from ZurichJS last night. It was a wonderful conference in a beautiful city, and it was so nice meeting so many people. A big thank you to everyone who stopped me to say hi!

I had batched a bit of content before I left, so below is what I was up to this week and the quiz, but I don’t have any links to share this time around.

🙋‍♂️ What I’ve been up to this week

📺 CSS can count now!

video preview​

If you’ve ever built a staggered animation, you know that it can be a little annoying, but sibling-index() and sibling-count() make it so easy!

There’s a quick colour example in the middle too, where the index drives a hue rather than a delay, and then I take a look at a z-index use case as well.

⚡ :invalid sorta sucks… but there’s an alternative now

video preview​

:invalid starts matching the moment the page loads, which means an empty required field goes red before anyone has typed anything. :user-invalid waits until the person has actually interacted with it, which is what you wanted in the first place.

📝 Quiz time!

A rare quiz question with only two possible answers instead of four! If you don’t have a container-type declared anywhere on your page, but an element is using cqi units, what would it be measuring?

  • Nothing. Container query related things require a defined container.
  • The viewport. Unlike @container, container query units fallback to the viewport.

As per usual, you'll have to head on over to YouTube to take a stab at the quiz, and once you answer, you'll see if you were right or not.

​

Have a fantastic week!
Kevin

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Hi! I'm Kevin

Helping people fall in love with CSS

Weekly newsletter, where I talk about tangentially-related front-end development topics and share what I've been up to in the last week, plus any cool/fun/interesting/useful links I come across as well.

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