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Show and Hide Content Easily With details and summary HTML Tags

Vitor Paladini on September 30, 2020

Here's a neat little trick: You can use the <details> and <summary> HTML tags to create a simple accordion/collapsible UI. The only...
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Giorgos Sarigiannidis • Edited

This is a nice and simple trick which I wanted to further investigate myself too at some point. Mostly, I wanted to investigate 2 basic topics:

  • Is it semantically correct to use it as an FAQ or should the markup be different on such cases?
  • Can you apply CSS animations?

Do you happen to have any good resources on the above?

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Vitor Paladini

Hey Giorgos, great questions.

Is it semantically correct to use it as an FAQ or should the markup be different on such cases?

I'd say so, yeah! The says W3C spec says that "The rest of the element’s contents represents the additional information or controls."

A FAQ answer seems like additional information in my book.

Can you apply CSS animations?

Hmm... To a degree, but animating display and height is particularly tricky. I've found some examples but none particularly good. I'll give it a try and update the article if I find a way to do it 🙂

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Cezar Augusto

Hey @vtrpldn , nice post! Great to know about summary/details, love dynamic HTML elements.

btw is it possible (semantically?) to have the component to display in an "open" state by default? Would be cool! :)

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Vitor Paladini

Hey, Cezar. Thanks!

Yes, you can add an open attribute to it, like so: <details open> and the details box will start in an opened state

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Cezar Augusto

cool, thanks! been learning nice stuff from your posts here on DEV, keep them coming!

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Uriel Bitton

Very nice. I'm curious to know how do you make the action clickable without any JS

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Vitor Paladini

That's just how <details> + <summary> works. It is quite like how you can make a range slider with <input type="range"> 🙂

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Uriel Bitton

ahh ok nice! thanks man!

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Christian Kaisermann

Your brain is beautiful, sir!

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Vitor Paladini

Thanks for your support, Chris

You also have a magnificent cranial anatomy 🧠

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Amitsheo

Hi,

This is nice,
I have a query.

I just want to display tag content only when media is less than 600px, but more than that want to disable tag property but content should be displayed. I donot want to "display :none "

Please help me regarding this.

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Lakindu Kariyawasam

what a tutorial !
simple, but elegant trick..
thank you!

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Vitor Paladini

Glad I could help 😄

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Vitor Paladini

Thanks! ☃️

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Vitor Paladini

Thanks, Felipe! I love finding and sharing these little nuggets of webdev, let me know if you have a suggestion 😄