Powered by NeGD | MeitY Government of India® UX4G
Accordion
Build vertically collapsing accordions in combination with our Collapse JavaScript plugin.
How it works? #
The accordion is collapsible because collapse is used internally. Add the .open
class to the .accordion
in order to render an extended accordion.
The animation effect of this component is dependent on the prefers-reduced-motion media query. See the [reduced motion section of our accessibility documentation].
Example #
<div class="accordion" id="accordionExample">
<div class="accordion-item">
<h2 class="accordion-header" id="headingOne">
<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" aria-labelledby="headingOne" data-bs-parent="#accordionExample">
<div class="accordion-body">
<strong>The accordion body of the first item is this. Until the collapse plugin adds the relevant classes that is used to style each piece, it is displayed by default. Through CSS transitions, these classes regulate both the general appearance and the showing and concealing of elements. With custom CSS or by modifying our default variables, developers can change any of this. Almost any HTML can be placed inside the.accordion-body, however the transition does restrict overflow.
</div>
</div>
</div>
<div class="accordion-item">
<h2 class="accordion-header" id="headingTwo">
<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" aria-labelledby="headingTwo" data-bs-parent="#accordionExample">
<div class="accordion-body">
<strong> This is the body of the second item's accordion.</strong> Prior to the collapse plugin adding the relevant classes that we need to style each piece, it is by default hidden. Through CSS transitions, these classes regulate both the general appearance and the showing and concealing of elements. With custom CSS or by modifying our default variables, it is possible to change any of this. Almost any HTML can be placed inside the .accordion-body, however the transition does restrict overflow.
</div>
</div>
</div>
<div class="accordion-item">
<h2 class="accordion-header" id="headingThree">
<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" aria-labelledby="headingThree" data-bs-parent="#accordionExample">
<div class="accordion-body">
<strong>The accordion body of the third piece is this.</strong> Until the collapse plugin adds the relevant classes that needs to style each piece, it is hidden by default. The general appearance as well as the showing and concealing using CSS transitions are controlled by these classes. You can change any of this by changing our default settings or adding your own CSS. It's also important to remember that almost any HTML can be placed inside the .accordion-body, albeit the transition does restrict overflow.
</div>
</div>
</div>
</div>
RESULT
.accordion-body
, however the transition does restrict overflow.
.accordion-body
, albeit the transition does restrict overflow.
Flush #
To render accordions edge-to-edge with their parent container, add the class .accordion-flush
to eliminate the default background color, some borders
, and some rounded
corners.
<div class="accordion accordion-flush" id="accordionFlushExample"><div class="accordion-item"><h2 class="accordion-header" id="flush-headingOne"><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" aria-labelledby="flush-headingOne" 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" id="flush-headingTwo"><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" aria-labelledby="flush-headingTwo" 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" id="flush-headingThree"><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" aria-labelledby="flush-headingThree" 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>
RESULT
.accordion-flush
class.
This is the first item's accordion body.
.accordion-flush
class.
This is the second item's accordion
body. Let's imagine this being filled
with some actual content.
.accordion-flush
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.
Always Open #
Omit the data-bs-parent
attribute. To keep accordion items open when another item is opened, use the .accordion-collapse
style.
<div class="accordion" id="accordionExample">
<div class="accordion-item">
<h2 class="accordion-header" id="headingOne">
<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" aria-labelledby="headingOne" data-bs-parent="#accordionExample">
<div class="accordion-body">
<strong>The accordion body of the first item is this.</strong> Until the collapse plugin adds the relevant classes that we use to style each piece, it is displayed by default. Through CSS transitions, these classes regulate both the general appearance and the showing and concealing of elements. With custom CSS or by modifying our default variables, you can change any of this. Almost any HTML can be placed inside the.accordion-body, however the transition does restrict overflow.
</div>
</div>
</div>
<div class="accordion-item">
<h2 class="accordion-header" id="headingTwo">
<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" aria-labelledby="headingTwo" data-bs-parent="#accordionExample">
<div class="accordion-body">
<strong> This is the body of the second item's accordion.</strong> Prior to the collapse plugin adding the relevant classes that we need to style each piece, it is by default hidden. Through CSS transitions, these classes regulate both the general appearance and the showing and concealing of elements. With custom CSS or by modifying our default variables, it is possible to change any of this. Almost any HTML can be placed inside the .accordion-body, however the transition does restrict overflow.
</div>
</div>
</div>
<div class="accordion-item">
<h2 class="accordion-header" id="headingThree">
<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" aria-labelledby="headingThree" data-bs-parent="#accordionExample">
<div class="accordion-body">
<strong>The accordion body of the third piece is this.</strong> Until the collapse plugin adds the relevant classes that needs to style each piece, it is hidden by default. The general appearance as well as the showing and concealing using CSS transitions are controlled by these classes. You can change any of this by changing our default settings or adding your own CSS. It's also important to remember that almost any HTML can be placed inside the .accordion-body, albeit the transition does restrict overflow.
</div>
</div>
</div>
</div>
RESULT
.accordion-body
, however the transition does restrict overflow.
.accordion-body
, however the transition does restrict overflow.
.accordion-body
, albeit the transition does restrict overflow.
Accessibility #
Please read the collapse accessibility section for more information.
CSS #
Variables #
Added in v1.0.1
As part of UX4G’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.
--#{$prefix}accordion-color: #{$accordion-color};
--#{$prefix}accordion-bg: #{$accordion-bg};
--#{$prefix}accordion-transition: #{$accordion-transition};
--#{$prefix}accordion-border-color: #{$accordion-border-color};
--#{$prefix}accordion-border-width: #{$accordion-border-width};
--#{$prefix}accordion-border-radius: #{$accordion-border-radius};
--#{$prefix}accordion-inner-border-radius: #{$accordion-inner-border-radius};
--#{$prefix}accordion-btn-padding-x: #{$accordion-button-padding-x};
--#{$prefix}accordion-btn-padding-y: #{$accordion-button-padding-y};
--#{$prefix}accordion-btn-color: #{$accordion-button-color};
--#{$prefix}accordion-btn-bg: #{$accordion-button-bg};
--#{$prefix}accordion-btn-icon: #{escape-svg($accordion-button-icon)};
--#{$prefix}accordion-btn-icon-width: #{$accordion-icon-width};
--#{$prefix}accordion-btn-icon-transform: #{$accordion-icon-transform};
--#{$prefix}accordion-btn-icon-transition: #{$accordion-icon-transition};
--#{$prefix}accordion-btn-active-icon: #{escape-svg($accordion-button-active-icon)};
--#{$prefix}accordion-btn-focus-border-color: #{$accordion-button-focus-border-color};
--#{$prefix}accordion-btn-focus-box-shadow: #{$accordion-button-focus-box-shadow};
--#{$prefix}accordion-body-padding-x: #{$accordion-body-padding-x};
--#{$prefix}accordion-body-padding-y: #{$accordion-body-padding-y};
--#{$prefix}accordion-active-color: #{$accordion-button-active-color};
--#{$prefix}accordion-active-bg: #{$accordion-button-active-bg};
Sass variables #
$accordion-padding-y: 1rem;
$accordion-padding-x: 1.25rem;
$accordion-color: $body-color; // Sass variable because of $accordion-button-icon
$accordion-bg: $body-bg;
$accordion-border-width: $border-width;
$accordion-border-color: var(--#{$prefix}border-color);
$accordion-border-radius: $border-radius;
$accordion-inner-border-radius: subtract($accordion-border-radius, $accordion-border-width);
$accordion-body-padding-y: $accordion-padding-y;
$accordion-body-padding-x: $accordion-padding-x;
$accordion-button-padding-y: $accordion-padding-y;
$accordion-button-padding-x: $accordion-padding-x;
$accordion-button-color: $accordion-color;
$accordion-button-bg: var(--#{$prefix}accordion-bg);
$accordion-transition: $btn-transition, border-radius .15s ease;
$accordion-button-active-bg: tint-color($component-active-bg, 90%);
$accordion-button-active-color: shade-color($primary, 10%);
$accordion-button-focus-border-color: $input-focus-border-color;
$accordion-button-focus-box-shadow: $btn-focus-box-shadow;
$accordion-icon-width: 1.25rem;
$accordion-icon-color: $accordion-button-color;
$accordion-icon-active-color: $accordion-button-active-color;
$accordion-icon-transition: transform .2s ease-in-out;
$accordion-icon-transform: rotate(-180deg);
$accordion-button-icon: url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='#{$accordion-icon-color}'><path fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/></svg>");
$accordion-button-active-icon: url("data:image/svg+xml,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='#{$accordion-icon-active-color}'><path fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/></svg>");