Accordion
An accordion is a vertical list of items, including text, tables, or images, in expandable tabs, one item per tab. The default behavior expands the first item with other items collapsed and displays the items in the order they are entered. The accordion can also be displayed as a numbered list, and the default behavior can be altered to "collapse all" on page load. Users can expand or contract an accordion with one click.
Usage
Use alerts to communicate deadlines, changes to important information, and emergencies. But use them sparingly—if users become accustomed to seeing an alert frequently, they may become desensitized to it.
Examples
Simple Accordion
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
Sunt in culpa qui officia deserunt mollit anim id est laborum.

Accordions can also be used as a numbered list.
Accordions can also be used as a numbered list.
Numeric Accordion
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.7.1/jquery.min.js"></script>
<script>
(function($){
$(document).ready(function() {
$('button.accordion').click(function() {
this.classList.toggle("active");
var expanded = 'false';
if ($(this).hasClass('active')) {
expanded = 'true';
}
$(this).attr('aria-expanded', expanded);
$(this).next().slideToggle(200, function() {
$(this).toggleClass("show");
});
$(this).parents(".cu-accordion:eq(0)").find(".accordion-expand-all-option").removeClass("active");
$(this).parents(".cu-accordion:eq(0)").find(".accordion-collapse-all-option").removeClass("active");
});
$(".accordion-expand-all-option").click(function() {
$(this).addClass("active");
$(this).parents(".cu-accordion:eq(0)").find('.accordion-collapse-all-option').removeClass("active");
$.each($(this).parents(".cu-accordion:eq(0)").find("button.accordion"), function() {
this.classList.add("active");
$(this).attr('aria-expanded', 'true');
$(this).next().slideDown(200, function() {
$(this).addClass("show");
});
});
});
$('.accordion-collapse-all-option').click(function() {
$(this).addClass("active");
$('.accordion-expand-all-option').removeClass("active");
$.each($(this).parents(".cu-accordion:eq(0)").find("button.accordion"), function() {
this.classList.remove("active");
$(this).attr('aria-expanded', 'false');
$(this).next().slideUp(200, function() {
$(this).removeClass("show");
});
});
});
$(".cu-accordion[data-collapse=1]").each(function() {
$(this).find('.accordion-collapse-all-option').click();
});
});
})(jQuery);
</script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.6.0/css/all.min.css" integrity="sha512-Kc323vGBEqzTmouAECnVceyQqyqdsSiqLQISBL29aUW4U/M7pSPA/gEUZQqv1cwx4OnYxTxve5UMg5GT6L4JJg==" crossorigin="anonymous" referrerpolicy="no-referrer" />
<style type="text/css">
button.accordion {
background: none;
border: none;
color: #0e5a90;
cursor: pointer;
font-size: 1.5em;
outline: none;
padding: 5px 0;
text-align: left;
transition: .4s;
width: 100%;
}
button.accordion .accordion-icon {
color: #555;
float: left;
font-size: .7em;
min-width: 2.5em;
text-align: center;
transition: all .2s;
vertical-align: middle;
}
button.accordion.active .accordion-icon {
transform: rotate(90deg);
}
button.accordion h3 {
align-items: baseline;
display: flex;
font-family: 'Proxima Nova', san-serif;
font-size: 1em;
font-weight: 300;
margin: 0;
color: #555555;
}
.cu-accordion-item {
border-bottom: 1px solid #ebebeb;
margin-bottom: 24px;
padding: 10px 0;
}
div.accordion {
display: none;
margin: 5px 0 0 2.5em;
padding: 5px 0;
}
div.accordion.show {
display: block;
}
.accordion-checkboxes {
display: flex;
float: right;
margin: 0 0 10px;
}
.accordion-checkboxes button {
background-color: #fff;
background-image: none;
border: 1px solid #ccc;
border-radius: 4px;
color: #333;
cursor: pointer;
display: inline-block;
font-size: 14px;
font-weight: normal;
line-height: 1.42857143;
margin-bottom: 0;
padding: 6px 12px;
text-align: center;
touch-action: manipulation;
user-select: none;
vertical-align: middle;
white-space: nowrap;
}
.accordion-checkboxes button.active {
background-color: #e6e6e6;
border-color: #adadad;
box-shadow: inset 0 3px 5px rgba(0, 0, 0, 0.125);
color: #333;
}
.accordion-checkboxes button:first-child:not(:last-child):not(.dropdown-toggle) {
border-bottom-right-radius: 0;
border-top-right-radius: 0;
margin-right: -1px;
}
.accordion-checkboxes button:last-child:not(:first-child) {
border-bottom-left-radius: 0;
border-top-left-radius: 0;
}
</style>
<div class="cu-accordion" data-collapse="0">
<div class="accordion-checkboxes" id="accordion-checkboxes-691" role="group">
<button class="accordion-expand-all-option" name="accordion-expand" type="button">Expand all</button>
<button class="accordion-collapse-all-option" name="accordion-collapse" type="button">Collapse all</button>
</div>
<h2 class="accordion-title">Simple Accordion</h2>
<div class="cu-accordion-content">
<div class="cu-accordion-item anchored" id="cu_accordion_item-661">
<button class="accordion active show">
<h3>
<i class="accordion-icon fa-solid fa-chevron-right"></i>
Item 1
</h3>
</button>
<div class="accordion active show">
<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam.</p>
</div>
</div>
<div class="cu-accordion-item anchored" id="cu_accordion_item-667">
<button class="accordion">
<h3>
<i class="accordion-icon fa-solid fa-chevron-right"></i>
Item 2
</h3>
</button>
<div class="accordion">
<p>Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
</div>
</div>
<div class="cu-accordion-item anchored" id="cu_accordion_item-688">
<button class="accordion">
<h3>
<i class="accordion-icon fa-solid fa-chevron-right"></i>
Item 3
</h3>
</button>
<div class="accordion">
<p>Sunt in culpa qui officia deserunt mollit anim id est laborum.</p>
<figure class="field field--name-field-cu-image field--type-image field--label-hidden image-with-borders image-wrapper cap-bot" id="bar-graph-of-favorite-types-of-movies-682"><img alt="Bar graph of favorite types of movies" class="img-responsive" data-entity-type="" data-entity-uuid="" height="394" src="https://visualidentity.columbia.edu/sites/default/files/styles/cu_crop/public/private/favortie%20type%20of%20movies%20graph.png?itok=akfKKKP-" typeof="foaf:Image" width="600" /></figure>
<p>Accordions can also be used as a numbered list.</p>
</div>
</div>
</div>
</div>