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Bootstrap/site/content/docs/5.3/components/accordion.md

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---
layout: docs
title: Accordion
description: Build vertically collapsing accordions in combination with our Collapse JavaScript plugin.
group: components
aliases:
- "/components/"
- "/docs/5.3/components/"
toc: true
---
## How it works
The accordion uses [collapse]({{< docsref "/components/collapse" >}}) internally to make it collapsible. To render an accordion that's expanded, add the `.open` class on the `.accordion`.
{{< callout info >}}
{{< partial "callouts/info-prefersreducedmotion.md" >}}
{{< /callout >}}
## Example
Click the accordions below to expand/collapse the accordion content.
{{< example >}}
<div class="accordion" id="accordionExample">
<div class="accordion-item">
<h2 class="accordion-header">
2020-11-06 16:21:57 +01:00
<button class="accordion-button" type="button" data-bs-toggle="collapse" data-bs-target="#collapseOne" aria-expanded="true" aria-controls="collapseOne">
Accordion Item #1
</button>
</h2>
<div id="collapseOne" class="accordion-collapse collapse show" data-bs-parent="#accordionExample">
<div class="accordion-body">
<strong>This is the first item's accordion body.</strong> It is shown by default, until the collapse plugin adds the appropriate classes that we use to style each element. These classes control the overall appearance, as well as the showing and hiding via CSS transitions. You can modify any of this with custom CSS or overriding our default variables. It's also worth noting that just about any HTML can go within the <code>.accordion-body</code>, though the transition does limit overflow.
</div>
</div>
</div>
<div class="accordion-item">
<h2 class="accordion-header">
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<button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseTwo" aria-expanded="false" aria-controls="collapseTwo">
Accordion Item #2
</button>
</h2>
<div id="collapseTwo" class="accordion-collapse collapse" data-bs-parent="#accordionExample">
<div class="accordion-body">
<strong>This is the second item's accordion body.</strong> It is hidden by default, until the collapse plugin adds the appropriate classes that we use to style each element. These classes control the overall appearance, as well as the showing and hiding via CSS transitions. You can modify any of this with custom CSS or overriding our default variables. It's also worth noting that just about any HTML can go within the <code>.accordion-body</code>, though the transition does limit overflow.
</div>
</div>
</div>
<div class="accordion-item">
<h2 class="accordion-header">
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<button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#collapseThree" aria-expanded="false" aria-controls="collapseThree">
Accordion Item #3
</button>
</h2>
<div id="collapseThree" class="accordion-collapse collapse" data-bs-parent="#accordionExample">
<div class="accordion-body">
<strong>This is the third item's accordion body.</strong> It is hidden by default, until the collapse plugin adds the appropriate classes that we use to style each element. These classes control the overall appearance, as well as the showing and hiding via CSS transitions. You can modify any of this with custom CSS or overriding our default variables. It's also worth noting that just about any HTML can go within the <code>.accordion-body</code>, though the transition does limit overflow.
</div>
</div>
</div>
</div>
{{< /example >}}
### Flush
2023-01-03 18:00:38 +01:00
Add `.accordion-flush` to remove some borders and rounded corners to render accordions edge-to-edge with their parent container.
Add dark mode support (#35857) * Add dark mode to docs * Minor fix: missing space indentation * Minor fix: revert utilities/z-index added-in modification * Remove prev: and next: from doc because extracted to another PR * Use .bg-body-tertiary in all Utilities > Overflow examples * fix example * Fix up spacing examples * Update box-shadow Sass variables and utilities to auto-adjust to color modes * Remove unused docs class * Refactor form styles to use CSS variable for background images on .form-check and .form-switch * Fix docs selector * Rename shortcut for clarity * Heading consistency * Reintroduce missing 4th grid item in Utilities > Spacing example * Fix bundlewatch * .bd-callout* rendering is OK so removing comments in the code * Update scss/_utilities.scss Co-authored-by: Julien Déramond <julien.deramond@orange.com> * Fix gutters example styling * Fix text colors on background utils docs * redesign and fix up position marker example, which doesn't show nicely in darkmode but at least isn't broken * fix some color utils examples * Deprecate mixin notice * Deprecate notice for list-group-item-variant() mixin * Revamp new link CSS vars * Use map-keys in some each Sass files * Remove list-group-item-variant mixin ref in sass loop desc * Display CSS vars scoped to our built-in dark mode * Revert previous commit * Fix list group variant link * Fix typo * Remove imports of alert/list-group mixins in scss/_mixins.scss * Small formatting + comments removal in scss/_content.scss * Fix alert links colors * fix dropdown border-radius mixin * fix link color and underline again, this time using CSS var override for color var and fallback value for the underline * fix colors on docs navbar for dark mode * remove two changes * missing ref * another link underline fix, just use sass vars for link decoration for now * missing color bg docs, plus move dropdown override to scss * more changes from review * fix some examples, drop unused docs navbar styles, update docs navbar color mode to use mixin * Few fixes around type - Restored CSS variable for color on headings, this time with a fallback value - In conjunction, restored and wrapped the default CSS var with a null value check - Split headings and paragraphs docs in Reboot, elaborated on them * Restyle custom details > summary element in docs * Rewrite some migration docs * fix form checks * Fix up some navbar styling, tweak docs callout * Fix select images, mostly for validation styling * Clean up some migration notes, document some new form control CSS vars, mention new variables-dark in sass docs * Update site/content/docs/5.2/components/scrollspy.md Co-authored-by: Julien Déramond <julien.deramond@orange.com> * Apply suggestions from code review Co-authored-by: Julien Déramond <julien.deramond@orange.com> * mention form control css vars in migration guide * Tweak grid and flex docs background examples * clarify some docs * fix some more things Co-authored-by: Julien Déramond <juderamond@gmail.com> Co-authored-by: Julien Déramond <julien.deramond@orange.com>
2022-11-29 07:30:26 +01:00
{{< example class="bg-body-secondary" >}}
<div class="accordion accordion-flush" id="accordionFlushExample">
<div class="accordion-item">
<h2 class="accordion-header">
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<button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#flush-collapseOne" aria-expanded="false" aria-controls="flush-collapseOne">
Accordion Item #1
</button>
</h2>
<div id="flush-collapseOne" class="accordion-collapse collapse" data-bs-parent="#accordionFlushExample">
<div class="accordion-body">Placeholder content for this accordion, which is intended to demonstrate the <code>.accordion-flush</code> class. This is the first item's accordion body.</div>
</div>
</div>
<div class="accordion-item">
<h2 class="accordion-header">
2020-11-06 16:21:57 +01:00
<button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#flush-collapseTwo" aria-expanded="false" aria-controls="flush-collapseTwo">
Accordion Item #2
</button>
</h2>
<div id="flush-collapseTwo" class="accordion-collapse collapse" data-bs-parent="#accordionFlushExample">
<div class="accordion-body">Placeholder content for this accordion, which is intended to demonstrate the <code>.accordion-flush</code> class. This is the second item's accordion body. Let's imagine this being filled with some actual content.</div>
</div>
</div>
<div class="accordion-item">
<h2 class="accordion-header">
2020-11-06 16:21:57 +01:00
<button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#flush-collapseThree" aria-expanded="false" aria-controls="flush-collapseThree">
Accordion Item #3
</button>
</h2>
<div id="flush-collapseThree" class="accordion-collapse collapse" data-bs-parent="#accordionFlushExample">
<div class="accordion-body">Placeholder content for this accordion, which is intended to demonstrate the <code>.accordion-flush</code> class. This is the third item's accordion body. Nothing more exciting happening here in terms of content, but just filling up the space to make it look, at least at first glance, a bit more representative of how this would look in a real-world application.</div>
</div>
</div>
</div>
{{< /example >}}
### Always open
Omit the `data-bs-parent` attribute on each `.accordion-collapse` to make accordion items stay open when another item is opened.
{{< example >}}
<div class="accordion" id="accordionPanelsStayOpenExample">
<div class="accordion-item">
<h2 class="accordion-header">
<button class="accordion-button" type="button" data-bs-toggle="collapse" data-bs-target="#panelsStayOpen-collapseOne" aria-expanded="true" aria-controls="panelsStayOpen-collapseOne">
Accordion Item #1
</button>
</h2>
<div id="panelsStayOpen-collapseOne" class="accordion-collapse collapse show">
<div class="accordion-body">
<strong>This is the first item's accordion body.</strong> It is shown by default, until the collapse plugin adds the appropriate classes that we use to style each element. These classes control the overall appearance, as well as the showing and hiding via CSS transitions. You can modify any of this with custom CSS or overriding our default variables. It's also worth noting that just about any HTML can go within the <code>.accordion-body</code>, though the transition does limit overflow.
</div>
</div>
</div>
<div class="accordion-item">
<h2 class="accordion-header">
<button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#panelsStayOpen-collapseTwo" aria-expanded="false" aria-controls="panelsStayOpen-collapseTwo">
Accordion Item #2
</button>
</h2>
<div id="panelsStayOpen-collapseTwo" class="accordion-collapse collapse">
<div class="accordion-body">
<strong>This is the second item's accordion body.</strong> It is hidden by default, until the collapse plugin adds the appropriate classes that we use to style each element. These classes control the overall appearance, as well as the showing and hiding via CSS transitions. You can modify any of this with custom CSS or overriding our default variables. It's also worth noting that just about any HTML can go within the <code>.accordion-body</code>, though the transition does limit overflow.
</div>
</div>
</div>
<div class="accordion-item">
<h2 class="accordion-header">
<button class="accordion-button collapsed" type="button" data-bs-toggle="collapse" data-bs-target="#panelsStayOpen-collapseThree" aria-expanded="false" aria-controls="panelsStayOpen-collapseThree">
Accordion Item #3
</button>
</h2>
<div id="panelsStayOpen-collapseThree" class="accordion-collapse collapse">
<div class="accordion-body">
<strong>This is the third item's accordion body.</strong> It is hidden by default, until the collapse plugin adds the appropriate classes that we use to style each element. These classes control the overall appearance, as well as the showing and hiding via CSS transitions. You can modify any of this with custom CSS or overriding our default variables. It's also worth noting that just about any HTML can go within the <code>.accordion-body</code>, though the transition does limit overflow.
</div>
</div>
</div>
</div>
{{< /example >}}
## Accessibility
Please read the [collapse accessibility section]({{< docsref "/components/collapse#accessibility" >}}) for more information.
## CSS
### Variables
{{< added-in "5.2.0" >}}
As part of Bootstrap's evolving CSS variables approach, accordions now use local CSS variables on `.accordion` for enhanced real-time customization. Values for the CSS variables are set via Sass, so Sass customization is still supported, too.
{{< scss-docs name="accordion-css-vars" file="scss/_accordion.scss" >}}
### Sass variables
{{< scss-docs name="accordion-variables" file="scss/_variables.scss" >}}