🕷️ Crawler Inspector

URL Lookup

Direct Parameter Lookup

Raw Queries and Responses

1. Shard Calculation

Query:

Response:

Calculated Shard: 92 (from laksa098)

2. Crawled Status Check

Query:

curl -X POST \
  'http://laksa092.int.ahrefs:8124/' \
  -H 'Content-Type: text/plain' \
  -H 'X-ClickHouse-Database: crawler3' \
  -H 'Authorization: Basic YXBpOg==' \
  -d 'SELECT getAhrefsURLFromUnparsed(src_unparsed) AS found_url, ifNull(toUnixTimestamp(download_stamp), 0) AS crawl_time, ifNull(toUnixTimestamp(props_url_first_seen), 0) AS first_indexed_time, download_http_code AS http_code, src_unparsed AS src_unparsed, src_root_hash AS src_root_hash, history_drop_reason AS history_drop_reason, meta_title AS meta_title, meta_descriptions AS meta_descriptions, attrs_boilerpipe_text AS attrs_boilerpipe_text, attrs_markdown AS attrs_markdown, attrs_readable_markdown AS attrs_readable_markdown, meta_canonical AS meta_canonical FROM crawler3.page_info_local FINAL PREWHERE (src_root_hash, src_unparsed) IN ((getAhrefsRootHashFromUnparsed(getAhrefsUnparsedNoserviceFromURL(\'https://getbootstrap.com/docs/4.0/components/collapse/\')), getAhrefsUnparsedNoserviceFromURL(\'https://getbootstrap.com/docs/4.0/components/collapse/\'))) FORMAT JSONEachRow'

Response:

{"found_url":"https:\/\/getbootstrap.com\/docs\/4.0\/components\/collapse\/","crawl_time":1775524029,"first_indexed_time":1503007266,"http_code":200,"src_unparsed":"com,getbootstrap!\/docs\/4.0\/components\/collapse\/ s443","src_root_hash":"4088328555173515292","history_drop_reason":null,"meta_title":"Collapse · Bootstrap","meta_descriptions":["Toggle the visibility of content across your project with a few classes and our JavaScript plugins."],"attrs_boilerpipe_text":"Toggle the visibility of content across your project with a few classes and our JavaScript plugins.\nExample\nClick the buttons below to show and hide another element via class changes:\n.collapse\nhides content\n.collapsing\nis applied during transitions\n.collapse.show\nshows content\nYou can use a link with the\nhref\nattribute, or a button with the\ndata-target\nattribute. In both cases, the\ndata-toggle=\"collapse\"\nis required.\nLink with href\nAnim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident.\n<p>\n<a\nclass=\n\"btn btn-primary\"\ndata-toggle=\n\"collapse\"\nhref=\n\"#collapseExample\"\nrole=\n\"button\"\naria-expanded=\n\"false\"\naria-controls=\n\"collapseExample\"\n>\nLink with href\n<\/a>\n<button\nclass=\n\"btn btn-primary\"\ntype=\n\"button\"\ndata-toggle=\n\"collapse\"\ndata-target=\n\"#collapseExample\"\naria-expanded=\n\"false\"\naria-controls=\n\"collapseExample\"\n>\nButton with data-target\n<\/button>\n<\/p>\n<div\nclass=\n\"collapse\"\nid=\n\"collapseExample\"\n>\n<div\nclass=\n\"card card-body\"\n>\nAnim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident.\n<\/div>\n<\/div>\nMultiple targets\nA\n<button>\nor\n<a>\ncan show and hide multiple elements by referencing them with a JQuery selector in its\nhref\nor\ndata-target\nattribute.\nMultiple\n<button>\nor\n<a>\ncan show and hide an element if they each reference it with their\nhref\nor\ndata-target\nattribute\nToggle first element\nAnim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident.\nAnim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident.\n<p>\n<a\nclass=\n\"btn btn-primary\"\ndata-toggle=\n\"collapse\"\nhref=\n\"#multiCollapseExample1\"\nrole=\n\"button\"\naria-expanded=\n\"false\"\naria-controls=\n\"multiCollapseExample1\"\n>\nToggle first element\n<\/a>\n<button\nclass=\n\"btn btn-primary\"\ntype=\n\"button\"\ndata-toggle=\n\"collapse\"\ndata-target=\n\"#multiCollapseExample2\"\naria-expanded=\n\"false\"\naria-controls=\n\"multiCollapseExample2\"\n>\nToggle second element\n<\/button>\n<button\nclass=\n\"btn btn-primary\"\ntype=\n\"button\"\ndata-toggle=\n\"collapse\"\ndata-target=\n\".multi-collapse\"\naria-expanded=\n\"false\"\naria-controls=\n\"multiCollapseExample1 multiCollapseExample2\"\n>\nToggle both elements\n<\/button>\n<\/p>\n<div\nclass=\n\"row\"\n>\n<div\nclass=\n\"col\"\n>\n<div\nclass=\n\"collapse multi-collapse\"\nid=\n\"multiCollapseExample1\"\n>\n<div\nclass=\n\"card card-body\"\n>\nAnim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident.\n<\/div>\n<\/div>\n<\/div>\n<div\nclass=\n\"col\"\n>\n<div\nclass=\n\"collapse multi-collapse\"\nid=\n\"multiCollapseExample2\"\n>\n<div\nclass=\n\"card card-body\"\n>\nAnim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident.\n<\/div>\n<\/div>\n<\/div>\n<\/div>\nAccordion example\nUsing the\ncard\ncomponent, you can extend the default collapse behavior to create an accordion.\nAnim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.\nAnim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.\nAnim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.\n<div\nid=\n\"accordion\"\n>\n<div\nclass=\n\"card\"\n>\n<div\nclass=\n\"card-header\"\nid=\n\"headingOne\"\n>\n<h5\nclass=\n\"mb-0\"\n>\n<button\nclass=\n\"btn btn-link\"\ndata-toggle=\n\"collapse\"\ndata-target=\n\"#collapseOne\"\naria-expanded=\n\"true\"\naria-controls=\n\"collapseOne\"\n>\nCollapsible Group Item #1\n<\/button>\n<\/h5>\n<\/div>\n<div\nid=\n\"collapseOne\"\nclass=\n\"collapse show\"\naria-labelledby=\n\"headingOne\"\ndata-parent=\n\"#accordion\"\n>\n<div\nclass=\n\"card-body\"\n>\nAnim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.\n<\/div>\n<\/div>\n<\/div>\n<div\nclass=\n\"card\"\n>\n<div\nclass=\n\"card-header\"\nid=\n\"headingTwo\"\n>\n<h5\nclass=\n\"mb-0\"\n>\n<button\nclass=\n\"btn btn-link collapsed\"\ndata-toggle=\n\"collapse\"\ndata-target=\n\"#collapseTwo\"\naria-expanded=\n\"false\"\naria-controls=\n\"collapseTwo\"\n>\nCollapsible Group Item #2\n<\/button>\n<\/h5>\n<\/div>\n<div\nid=\n\"collapseTwo\"\nclass=\n\"collapse\"\naria-labelledby=\n\"headingTwo\"\ndata-parent=\n\"#accordion\"\n>\n<div\nclass=\n\"card-body\"\n>\nAnim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.\n<\/div>\n<\/div>\n<\/div>\n<div\nclass=\n\"card\"\n>\n<div\nclass=\n\"card-header\"\nid=\n\"headingThree\"\n>\n<h5\nclass=\n\"mb-0\"\n>\n<button\nclass=\n\"btn btn-link collapsed\"\ndata-toggle=\n\"collapse\"\ndata-target=\n\"#collapseThree\"\naria-expanded=\n\"false\"\naria-controls=\n\"collapseThree\"\n>\nCollapsible Group Item #3\n<\/button>\n<\/h5>\n<\/div>\n<div\nid=\n\"collapseThree\"\nclass=\n\"collapse\"\naria-labelledby=\n\"headingThree\"\ndata-parent=\n\"#accordion\"\n>\n<div\nclass=\n\"card-body\"\n>\nAnim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.\n<\/div>\n<\/div>\n<\/div>\n<\/div>\nAccessibility\nBe sure to add\naria-expanded\nto the control element. This attribute explicitly conveys the current state of the collapsible element tied to the control to screen readers and similar assistive technologies. If the collapsible element is closed by default, the attribute on the control element should have a value of\naria-expanded=\"false\"\n. If you’ve set the collapsible element to be open by default using the\nshow\nclass, set\naria-expanded=\"true\"\non the control instead. The plugin will automatically toggle this attribute on the control based on whether or not the collapsible element has been opened or closed (via JavaScript, or because the user triggered another control element also tied to the same collapsbile element). If the control element’s HTML element is not a button (e.g., an\n<a>\nor\n<div>\n), the attribute\nrole=\"button\"\nshould be added to the element.\nIf your control element is targeting a single collapsible element – i.e. the\ndata-target\nattribute is pointing to an\nid\nselector – you should add the\naria-controls\nattribute to the control element, containing the\nid\nof the collapsible element. Modern screen readers and similar assistive technologies make use of this attribute to provide users with additional shortcuts to navigate directly to the collapsible element itself.\nNote that Bootstrap’s current implementation does not cover the various keyboard interactions described in the\nWAI-ARIA Authoring Practices 1.1 accordion pattern\n- you will need to include these yourself with custom JavaScript.\nUsage\nThe collapse plugin utilizes a few classes to handle the heavy lifting:\n.collapse\nhides the content\n.collapse.show\nshows the content\n.collapsing\nis added when the transition starts, and removed when it finishes\nThese classes can be found in\n_transitions.scss\n.\nVia data attributes\nJust add\ndata-toggle=\"collapse\"\nand a\ndata-target\nto the element to automatically assign control of one or more collapsible elements. The\ndata-target\nattribute accepts a CSS selector to apply the collapse to. Be sure to add the class\ncollapse\nto the collapsible element. If you’d like it to default open, add the additional class\nshow\n.\nTo add accordion-like group management to a collapsible area, add the data attribute\ndata-parent=\"#selector\"\n. Refer to the demo to see this in action.\nVia JavaScript\nEnable manually with:\n$\n(\n'.collapse'\n).\ncollapse\n()\nOptions\nOptions can be passed via data attributes or JavaScript. For data attributes, append the option name to\ndata-\n, as in\ndata-parent=\"\"\n.\nName\nType\nDefault\nDescription\nparent\nselector | jQuery object | DOM element\nfalse\nIf parent is provided, then all collapsible elements under the specified parent will be closed when this collapsible item is shown. (similar to traditional accordion behavior - this is dependent on the\ncard\nclass). The attribute has to be set on the target collapsible area.\ntoggle\nboolean\ntrue\nToggles the collapsible element on invocation\nMethods\nAsynchronous methods and transitions\nAll API methods are\nasynchronous\nand start a\ntransition\n. They return to the caller as soon as the transition is started but\nbefore it ends\n. In addition, a method call on a\ntransitioning component will be ignored\n.\nSee our JavaScript documentation for more information.\n.collapse(options)\nActivates your content as a collapsible element. Accepts an optional options\nobject\n.\n$\n(\n'#myCollapsible'\n).\ncollapse\n({\ntoggle\n:\nfalse\n})\n.collapse('toggle')\nToggles a collapsible element to shown or hidden.\nReturns to the caller before the collapsible element has actually been shown or hidden\n(i.e. before the\nshown.bs.collapse\nor\nhidden.bs.collapse\nevent occurs).\n.collapse('show')\nShows a collapsible element.\nReturns to the caller before the collapsible element has actually been shown\n(i.e. before the\nshown.bs.collapse\nevent occurs).\n.collapse('hide')\nHides a collapsible element.\nReturns to the caller before the collapsible element has actually been hidden\n(i.e. before the\nhidden.bs.collapse\nevent occurs).\n.collapse('dispose')\nDestroys an element’s collapse.\nEvents\nBootstrap’s collapse class exposes a few events for hooking into collapse functionality.\nEvent Type\nDescription\nshow.bs.collapse\nThis event fires immediately when the\nshow\ninstance method is called.\nshown.bs.collapse\nThis event is fired when a collapse element has been made visible to the user (will wait for CSS transitions to complete).\nhide.bs.collapse\nThis event is fired immediately when the\nhide\nmethod has been called.\nhidden.bs.collapse\nThis event is fired when a collapse element has been hidden from the user (will wait for CSS transitions to complete).\n$\n(\n'#myCollapsible'\n).\non\n(\n'hidden.bs.collapse'\n,\nfunction\n()\n{\n\/\/ do something…\n})","attrs_markdown":"[Skip to main content](https:\/\/getbootstrap.com\/docs\/4.0\/components\/collapse\/#content)\n\n[There's a newer version of Bootstrap\\!](https:\/\/getbootstrap.com\/)\n\n- [Home](https:\/\/getbootstrap.com\/)\n- [Documentation](https:\/\/getbootstrap.com\/docs\/4.0\/getting-started\/introduction\/)\n- [Examples](https:\/\/getbootstrap.com\/docs\/4.0\/examples\/)\n- [Expo](https:\/\/expo.getbootstrap.com\/)\n- [Blog](https:\/\/blog.getbootstrap.com\/)\n\n- [v4.0](https:\/\/getbootstrap.com\/docs\/4.0\/components\/collapse\/)\n  [Latest (v4.1.x)](https:\/\/getbootstrap.com\/docs\/4.1\/) [v4.0.0](https:\/\/getbootstrap.com\/docs\/4.0\/)\n  \n  [v4 Alpha 6](https:\/\/v4-alpha.getbootstrap.com\/) [v3.3.7](https:\/\/getbootstrap.com\/docs\/3.3\/) [v2.3.2](https:\/\/getbootstrap.com\/2.3.2\/)\n\n[Download](https:\/\/github.com\/twbs\/bootstrap\/archive\/v4.0.0.zip)\n\n[Getting started](https:\/\/getbootstrap.com\/docs\/4.0\/getting-started\/introduction\/)\n\n- [Introduction](https:\/\/getbootstrap.com\/docs\/4.0\/getting-started\/introduction\/)\n- [Download](https:\/\/getbootstrap.com\/docs\/4.0\/getting-started\/download\/)\n- [Contents](https:\/\/getbootstrap.com\/docs\/4.0\/getting-started\/contents\/)\n- [Browsers & devices](https:\/\/getbootstrap.com\/docs\/4.0\/getting-started\/browsers-devices\/)\n- [JavaScript](https:\/\/getbootstrap.com\/docs\/4.0\/getting-started\/javascript\/)\n- [Theming](https:\/\/getbootstrap.com\/docs\/4.0\/getting-started\/theming\/)\n- [Build tools](https:\/\/getbootstrap.com\/docs\/4.0\/getting-started\/build-tools\/)\n- [Webpack](https:\/\/getbootstrap.com\/docs\/4.0\/getting-started\/webpack\/)\n- [Accessibility](https:\/\/getbootstrap.com\/docs\/4.0\/getting-started\/accessibility\/)\n\n[Layout](https:\/\/getbootstrap.com\/docs\/4.0\/layout\/overview\/)\n\n- [Overview](https:\/\/getbootstrap.com\/docs\/4.0\/layout\/overview\/)\n- [Grid](https:\/\/getbootstrap.com\/docs\/4.0\/layout\/grid\/)\n- [Media object](https:\/\/getbootstrap.com\/docs\/4.0\/layout\/media-object\/)\n- [Utilities for layout](https:\/\/getbootstrap.com\/docs\/4.0\/layout\/utilities-for-layout\/)\n\n[Content](https:\/\/getbootstrap.com\/docs\/4.0\/content\/reboot\/)\n\n- [Reboot](https:\/\/getbootstrap.com\/docs\/4.0\/content\/reboot\/)\n- [Typography](https:\/\/getbootstrap.com\/docs\/4.0\/content\/typography\/)\n- [Code](https:\/\/getbootstrap.com\/docs\/4.0\/content\/code\/)\n- [Images](https:\/\/getbootstrap.com\/docs\/4.0\/content\/images\/)\n- [Tables](https:\/\/getbootstrap.com\/docs\/4.0\/content\/tables\/)\n- [Figures](https:\/\/getbootstrap.com\/docs\/4.0\/content\/figures\/)\n\n[Components](https:\/\/getbootstrap.com\/docs\/4.0\/components\/alerts\/)\n\n- [Alerts](https:\/\/getbootstrap.com\/docs\/4.0\/components\/alerts\/)\n- [Badge](https:\/\/getbootstrap.com\/docs\/4.0\/components\/badge\/)\n- [Breadcrumb](https:\/\/getbootstrap.com\/docs\/4.0\/components\/breadcrumb\/)\n- [Buttons](https:\/\/getbootstrap.com\/docs\/4.0\/components\/buttons\/)\n- [Button group](https:\/\/getbootstrap.com\/docs\/4.0\/components\/button-group\/)\n- [Card](https:\/\/getbootstrap.com\/docs\/4.0\/components\/card\/)\n- [Carousel](https:\/\/getbootstrap.com\/docs\/4.0\/components\/carousel\/)\n- [Collapse](https:\/\/getbootstrap.com\/docs\/4.0\/components\/collapse\/)\n- [Dropdowns](https:\/\/getbootstrap.com\/docs\/4.0\/components\/dropdowns\/)\n- [Forms](https:\/\/getbootstrap.com\/docs\/4.0\/components\/forms\/)\n- [Input group](https:\/\/getbootstrap.com\/docs\/4.0\/components\/input-group\/)\n- [Jumbotron](https:\/\/getbootstrap.com\/docs\/4.0\/components\/jumbotron\/)\n- [List group](https:\/\/getbootstrap.com\/docs\/4.0\/components\/list-group\/)\n- [Modal](https:\/\/getbootstrap.com\/docs\/4.0\/components\/modal\/)\n- [Navs](https:\/\/getbootstrap.com\/docs\/4.0\/components\/navs\/)\n- [Navbar](https:\/\/getbootstrap.com\/docs\/4.0\/components\/navbar\/)\n- [Pagination](https:\/\/getbootstrap.com\/docs\/4.0\/components\/pagination\/)\n- [Popovers](https:\/\/getbootstrap.com\/docs\/4.0\/components\/popovers\/)\n- [Progress](https:\/\/getbootstrap.com\/docs\/4.0\/components\/progress\/)\n- [Scrollspy](https:\/\/getbootstrap.com\/docs\/4.0\/components\/scrollspy\/)\n- [Tooltips](https:\/\/getbootstrap.com\/docs\/4.0\/components\/tooltips\/)\n\n[Utilities](https:\/\/getbootstrap.com\/docs\/4.0\/utilities\/borders\/)\n\n- [Borders](https:\/\/getbootstrap.com\/docs\/4.0\/utilities\/borders\/)\n- [Clearfix](https:\/\/getbootstrap.com\/docs\/4.0\/utilities\/clearfix\/)\n- [Close icon](https:\/\/getbootstrap.com\/docs\/4.0\/utilities\/close-icon\/)\n- [Colors](https:\/\/getbootstrap.com\/docs\/4.0\/utilities\/colors\/)\n- [Display](https:\/\/getbootstrap.com\/docs\/4.0\/utilities\/display\/)\n- [Embed](https:\/\/getbootstrap.com\/docs\/4.0\/utilities\/embed\/)\n- [Flex](https:\/\/getbootstrap.com\/docs\/4.0\/utilities\/flex\/)\n- [Float](https:\/\/getbootstrap.com\/docs\/4.0\/utilities\/float\/)\n- [Image replacement](https:\/\/getbootstrap.com\/docs\/4.0\/utilities\/image-replacement\/)\n- [Position](https:\/\/getbootstrap.com\/docs\/4.0\/utilities\/position\/)\n- [Screenreaders](https:\/\/getbootstrap.com\/docs\/4.0\/utilities\/screenreaders\/)\n- [Sizing](https:\/\/getbootstrap.com\/docs\/4.0\/utilities\/sizing\/)\n- [Spacing](https:\/\/getbootstrap.com\/docs\/4.0\/utilities\/spacing\/)\n- [Text](https:\/\/getbootstrap.com\/docs\/4.0\/utilities\/text\/)\n- [Vertical align](https:\/\/getbootstrap.com\/docs\/4.0\/utilities\/vertical-align\/)\n- [Visibility](https:\/\/getbootstrap.com\/docs\/4.0\/utilities\/visibility\/)\n\n[Extend](https:\/\/getbootstrap.com\/docs\/4.0\/extend\/approach\/)\n\n- [Approach](https:\/\/getbootstrap.com\/docs\/4.0\/extend\/approach\/)\n- [Icons](https:\/\/getbootstrap.com\/docs\/4.0\/extend\/icons\/)\n\n[Migration](https:\/\/getbootstrap.com\/docs\/4.0\/migration\/)\n\n[About](https:\/\/getbootstrap.com\/docs\/4.0\/about\/overview\/)\n\n- [Overview](https:\/\/getbootstrap.com\/docs\/4.0\/about\/overview\/)\n- [Brand](https:\/\/getbootstrap.com\/docs\/4.0\/about\/brand\/)\n- [License](https:\/\/getbootstrap.com\/docs\/4.0\/about\/license\/)\n- [Translations](https:\/\/getbootstrap.com\/docs\/4.0\/about\/translations\/)\n\n- [Example](https:\/\/getbootstrap.com\/docs\/4.0\/components\/collapse\/#example)\n- [Multiple targets](https:\/\/getbootstrap.com\/docs\/4.0\/components\/collapse\/#multiple-targets)\n- [Accordion example](https:\/\/getbootstrap.com\/docs\/4.0\/components\/collapse\/#accordion-example)\n- [Accessibility](https:\/\/getbootstrap.com\/docs\/4.0\/components\/collapse\/#accessibility)\n- [Usage](https:\/\/getbootstrap.com\/docs\/4.0\/components\/collapse\/#usage)\n  - [Via data attributes](https:\/\/getbootstrap.com\/docs\/4.0\/components\/collapse\/#via-data-attributes)\n  - [Via JavaScript](https:\/\/getbootstrap.com\/docs\/4.0\/components\/collapse\/#via-javascript)\n  - [Options](https:\/\/getbootstrap.com\/docs\/4.0\/components\/collapse\/#options)\n  - [Methods](https:\/\/getbootstrap.com\/docs\/4.0\/components\/collapse\/#methods)\n    - [Asynchronous methods and transitions](https:\/\/getbootstrap.com\/docs\/4.0\/components\/collapse\/#asynchronous-methods-and-transitions)\n    - [.collapse(options)](https:\/\/getbootstrap.com\/docs\/4.0\/components\/collapse\/#collapseoptions)\n    - [.collapse('toggle')](https:\/\/getbootstrap.com\/docs\/4.0\/components\/collapse\/#collapsetoggle)\n    - [.collapse('show')](https:\/\/getbootstrap.com\/docs\/4.0\/components\/collapse\/#collapseshow)\n    - [.collapse('hide')](https:\/\/getbootstrap.com\/docs\/4.0\/components\/collapse\/#collapsehide)\n    - [.collapse('dispose')](https:\/\/getbootstrap.com\/docs\/4.0\/components\/collapse\/#collapsedispose)\n  - [Events](https:\/\/getbootstrap.com\/docs\/4.0\/components\/collapse\/#events)\n\n# Collapse\nToggle the visibility of content across your project with a few classes and our JavaScript plugins.\n\n## Example\nClick the buttons below to show and hide another element via class changes:\n\n- `.collapse` hides content\n- `.collapsing` is applied during transitions\n- `.collapse.show` shows content\n\nYou can use a link with the `href` attribute, or a button with the `data-target` attribute. In both cases, the `data-toggle=\"collapse\"` is required.\n\n[Link with href](https:\/\/getbootstrap.com\/docs\/4.0\/components\/collapse\/#collapseExample)  Button with data-target\n\nAnim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident.\n\nCopy\n```\n<p>\n  <a class=\"btn btn-primary\" data-toggle=\"collapse\" href=\"#collapseExample\" role=\"button\" aria-expanded=\"false\" aria-controls=\"collapseExample\">\n    Link with href\n  <\/a>\n  <button class=\"btn btn-primary\" type=\"button\" data-toggle=\"collapse\" data-target=\"#collapseExample\" aria-expanded=\"false\" aria-controls=\"collapseExample\">\n    Button with data-target\n  <\/button>\n<\/p>\n<div class=\"collapse\" id=\"collapseExample\">\n  <div class=\"card card-body\">\n    Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident.\n  <\/div>\n<\/div>\n```\n## Multiple targets\nA `<button>` or `<a>` can show and hide multiple elements by referencing them with a JQuery selector in its `href` or `data-target` attribute. Multiple `<button>` or `<a>` can show and hide an element if they each reference it with their `href` or `data-target` attribute\n\n[Toggle first element](https:\/\/getbootstrap.com\/docs\/4.0\/components\/collapse\/#multiCollapseExample1) Toggle second element Toggle both elements\n\nAnim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident.\n\nAnim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident.\n\nCopy\n```\n<p>\n  <a class=\"btn btn-primary\" data-toggle=\"collapse\" href=\"#multiCollapseExample1\" role=\"button\" aria-expanded=\"false\" aria-controls=\"multiCollapseExample1\">Toggle first element<\/a>\n  <button class=\"btn btn-primary\" type=\"button\" data-toggle=\"collapse\" data-target=\"#multiCollapseExample2\" aria-expanded=\"false\" aria-controls=\"multiCollapseExample2\">Toggle second element<\/button>\n  <button class=\"btn btn-primary\" type=\"button\" data-toggle=\"collapse\" data-target=\".multi-collapse\" aria-expanded=\"false\" aria-controls=\"multiCollapseExample1 multiCollapseExample2\">Toggle both elements<\/button>\n<\/p>\n<div class=\"row\">\n  <div class=\"col\">\n    <div class=\"collapse multi-collapse\" id=\"multiCollapseExample1\">\n      <div class=\"card card-body\">\n        Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident.\n      <\/div>\n    <\/div>\n  <\/div>\n  <div class=\"col\">\n    <div class=\"collapse multi-collapse\" id=\"multiCollapseExample2\">\n      <div class=\"card card-body\">\n        Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident.\n      <\/div>\n    <\/div>\n  <\/div>\n<\/div>\n```\n## Accordion example\nUsing the [card](https:\/\/getbootstrap.com\/docs\/4.0\/components\/card\/) component, you can extend the default collapse behavior to create an accordion.\n\n##### Collapsible Group Item \\#1\nAnim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.\n\n##### Collapsible Group Item \\#2\nAnim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.\n\n##### Collapsible Group Item \\#3\nAnim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.\n\nCopy\n```\n<div id=\"accordion\">\n  <div class=\"card\">\n    <div class=\"card-header\" id=\"headingOne\">\n      <h5 class=\"mb-0\">\n        <button class=\"btn btn-link\" data-toggle=\"collapse\" data-target=\"#collapseOne\" aria-expanded=\"true\" aria-controls=\"collapseOne\">\n          Collapsible Group Item #1\n        <\/button>\n      <\/h5>\n    <\/div>\n\n    <div id=\"collapseOne\" class=\"collapse show\" aria-labelledby=\"headingOne\" data-parent=\"#accordion\">\n      <div class=\"card-body\">\n        Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.\n      <\/div>\n    <\/div>\n  <\/div>\n  <div class=\"card\">\n    <div class=\"card-header\" id=\"headingTwo\">\n      <h5 class=\"mb-0\">\n        <button class=\"btn btn-link collapsed\" data-toggle=\"collapse\" data-target=\"#collapseTwo\" aria-expanded=\"false\" aria-controls=\"collapseTwo\">\n          Collapsible Group Item #2\n        <\/button>\n      <\/h5>\n    <\/div>\n    <div id=\"collapseTwo\" class=\"collapse\" aria-labelledby=\"headingTwo\" data-parent=\"#accordion\">\n      <div class=\"card-body\">\n        Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.\n      <\/div>\n    <\/div>\n  <\/div>\n  <div class=\"card\">\n    <div class=\"card-header\" id=\"headingThree\">\n      <h5 class=\"mb-0\">\n        <button class=\"btn btn-link collapsed\" data-toggle=\"collapse\" data-target=\"#collapseThree\" aria-expanded=\"false\" aria-controls=\"collapseThree\">\n          Collapsible Group Item #3\n        <\/button>\n      <\/h5>\n    <\/div>\n    <div id=\"collapseThree\" class=\"collapse\" aria-labelledby=\"headingThree\" data-parent=\"#accordion\">\n      <div class=\"card-body\">\n        Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.\n      <\/div>\n    <\/div>\n  <\/div>\n<\/div>\n```\n## Accessibility\nBe sure to add `aria-expanded` to the control element. This attribute explicitly conveys the current state of the collapsible element tied to the control to screen readers and similar assistive technologies. If the collapsible element is closed by default, the attribute on the control element should have a value of `aria-expanded=\"false\"`. If you’ve set the collapsible element to be open by default using the `show` class, set `aria-expanded=\"true\"` on the control instead. The plugin will automatically toggle this attribute on the control based on whether or not the collapsible element has been opened or closed (via JavaScript, or because the user triggered another control element also tied to the same collapsbile element). If the control element’s HTML element is not a button (e.g., an `<a>` or `<div>`), the attribute `role=\"button\"` should be added to the element.\n\nIf your control element is targeting a single collapsible element – i.e. the `data-target` attribute is pointing to an `id` selector – you should add the `aria-controls` attribute to the control element, containing the `id` of the collapsible element. Modern screen readers and similar assistive technologies make use of this attribute to provide users with additional shortcuts to navigate directly to the collapsible element itself.\n\nNote that Bootstrap’s current implementation does not cover the various keyboard interactions described in the [WAI-ARIA Authoring Practices 1.1 accordion pattern](https:\/\/www.w3.org\/TR\/wai-aria-practices-1.1\/#accordion) - you will need to include these yourself with custom JavaScript.\n\n## Usage\nThe collapse plugin utilizes a few classes to handle the heavy lifting:\n\n- `.collapse` hides the content\n- `.collapse.show` shows the content\n- `.collapsing` is added when the transition starts, and removed when it finishes\n\nThese classes can be found in `_transitions.scss`.\n\n### Via data attributes\nJust add `data-toggle=\"collapse\"` and a `data-target` to the element to automatically assign control of one or more collapsible elements. The `data-target` attribute accepts a CSS selector to apply the collapse to. Be sure to add the class `collapse` to the collapsible element. If you’d like it to default open, add the additional class `show`.\n\nTo add accordion-like group management to a collapsible area, add the data attribute `data-parent=\"#selector\"`. Refer to the demo to see this in action.\n\n### Via JavaScript\nEnable manually with:\n\nCopy\n```\n$('.collapse').collapse()\n```\n### Options\nOptions can be passed via data attributes or JavaScript. For data attributes, append the option name to `data-`, as in `data-parent=\"\"`.\n\n| Name | Type | Default | Description |\n|---|---|---|---|\n| parent | selector \\| jQuery object \\| DOM element | false | If parent is provided, then all collapsible elements under the specified parent will be closed when this collapsible item is shown. (similar to traditional accordion behavior - this is dependent on the `card` class). The attribute has to be set on the target collapsible area. |\n| toggle | boolean | true | Toggles the collapsible element on invocation |\n### Methods\n#### Asynchronous methods and transitions\nAll API methods are **asynchronous** and start a **transition**. They return to the caller as soon as the transition is started but **before it ends**. In addition, a method call on a **transitioning component will be ignored**.\n\n[See our JavaScript documentation for more information.](https:\/\/getbootstrap.com\/docs\/4.0\/getting-started\/javascript\/)\n#### `.collapse(options)`\nActivates your content as a collapsible element. Accepts an optional options `object`.\n\nCopy\n```\n$('#myCollapsible').collapse({\n  toggle: false\n})\n```\n#### `.collapse('toggle')`\nToggles a collapsible element to shown or hidden. **Returns to the caller before the collapsible element has actually been shown or hidden** (i.e. before the `shown.bs.collapse` or `hidden.bs.collapse` event occurs).\n\n#### `.collapse('show')`\nShows a collapsible element. **Returns to the caller before the collapsible element has actually been shown** (i.e. before the `shown.bs.collapse` event occurs).\n\n#### `.collapse('hide')`\nHides a collapsible element. **Returns to the caller before the collapsible element has actually been hidden** (i.e. before the `hidden.bs.collapse` event occurs).\n\n#### `.collapse('dispose')`\nDestroys an element’s collapse.\n\n### Events\nBootstrap’s collapse class exposes a few events for hooking into collapse functionality.\n\n| Event Type | Description |\n|---|---|\n| show.bs.collapse | This event fires immediately when the `show` instance method is called. |\n| shown.bs.collapse | This event is fired when a collapse element has been made visible to the user (will wait for CSS transitions to complete). |\n| hide.bs.collapse | This event is fired immediately when the `hide` method has been called. |\n| hidden.bs.collapse | This event is fired when a collapse element has been hidden from the user (will wait for CSS transitions to complete). |\n\nCopy\n```\n$('#myCollapsible').on('hidden.bs.collapse', function () {\n  \/\/ do something…\n})\n```","attrs_readable_markdown":"Toggle the visibility of content across your project with a few classes and our JavaScript plugins.\n\n## Example\nClick the buttons below to show and hide another element via class changes:\n\n- `.collapse` hides content\n- `.collapsing` is applied during transitions\n- `.collapse.show` shows content\n\nYou can use a link with the `href` attribute, or a button with the `data-target` attribute. In both cases, the `data-toggle=\"collapse\"` is required.\n\n[Link with href](https:\/\/getbootstrap.com\/docs\/4.0\/components\/collapse\/#collapseExample)\n\nAnim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident.\n```\n<p>\n  <a class=\"btn btn-primary\" data-toggle=\"collapse\" href=\"#collapseExample\" role=\"button\" aria-expanded=\"false\" aria-controls=\"collapseExample\">\n    Link with href\n  <\/a>\n  <button class=\"btn btn-primary\" type=\"button\" data-toggle=\"collapse\" data-target=\"#collapseExample\" aria-expanded=\"false\" aria-controls=\"collapseExample\">\n    Button with data-target\n  <\/button>\n<\/p>\n<div class=\"collapse\" id=\"collapseExample\">\n  <div class=\"card card-body\">\n    Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident.\n  <\/div>\n<\/div>\n```\n## Multiple targets\nA `<button>` or `<a>` can show and hide multiple elements by referencing them with a JQuery selector in its `href` or `data-target` attribute. Multiple `<button>` or `<a>` can show and hide an element if they each reference it with their `href` or `data-target` attribute\n\n[Toggle first element](https:\/\/getbootstrap.com\/docs\/4.0\/components\/collapse\/#multiCollapseExample1)\n\nAnim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident.\n\nAnim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident.\n```\n<p>\n  <a class=\"btn btn-primary\" data-toggle=\"collapse\" href=\"#multiCollapseExample1\" role=\"button\" aria-expanded=\"false\" aria-controls=\"multiCollapseExample1\">Toggle first element<\/a>\n  <button class=\"btn btn-primary\" type=\"button\" data-toggle=\"collapse\" data-target=\"#multiCollapseExample2\" aria-expanded=\"false\" aria-controls=\"multiCollapseExample2\">Toggle second element<\/button>\n  <button class=\"btn btn-primary\" type=\"button\" data-toggle=\"collapse\" data-target=\".multi-collapse\" aria-expanded=\"false\" aria-controls=\"multiCollapseExample1 multiCollapseExample2\">Toggle both elements<\/button>\n<\/p>\n<div class=\"row\">\n  <div class=\"col\">\n    <div class=\"collapse multi-collapse\" id=\"multiCollapseExample1\">\n      <div class=\"card card-body\">\n        Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident.\n      <\/div>\n    <\/div>\n  <\/div>\n  <div class=\"col\">\n    <div class=\"collapse multi-collapse\" id=\"multiCollapseExample2\">\n      <div class=\"card card-body\">\n        Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident.\n      <\/div>\n    <\/div>\n  <\/div>\n<\/div>\n```\n## Accordion example\nUsing the [card](https:\/\/getbootstrap.com\/docs\/4.0\/components\/card\/) component, you can extend the default collapse behavior to create an accordion.\n\nAnim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.\n\nAnim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.\n\nAnim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.\n```\n<div id=\"accordion\">\n  <div class=\"card\">\n    <div class=\"card-header\" id=\"headingOne\">\n      <h5 class=\"mb-0\">\n        <button class=\"btn btn-link\" data-toggle=\"collapse\" data-target=\"#collapseOne\" aria-expanded=\"true\" aria-controls=\"collapseOne\">\n          Collapsible Group Item #1\n        <\/button>\n      <\/h5>\n    <\/div>\n\n    <div id=\"collapseOne\" class=\"collapse show\" aria-labelledby=\"headingOne\" data-parent=\"#accordion\">\n      <div class=\"card-body\">\n        Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.\n      <\/div>\n    <\/div>\n  <\/div>\n  <div class=\"card\">\n    <div class=\"card-header\" id=\"headingTwo\">\n      <h5 class=\"mb-0\">\n        <button class=\"btn btn-link collapsed\" data-toggle=\"collapse\" data-target=\"#collapseTwo\" aria-expanded=\"false\" aria-controls=\"collapseTwo\">\n          Collapsible Group Item #2\n        <\/button>\n      <\/h5>\n    <\/div>\n    <div id=\"collapseTwo\" class=\"collapse\" aria-labelledby=\"headingTwo\" data-parent=\"#accordion\">\n      <div class=\"card-body\">\n        Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.\n      <\/div>\n    <\/div>\n  <\/div>\n  <div class=\"card\">\n    <div class=\"card-header\" id=\"headingThree\">\n      <h5 class=\"mb-0\">\n        <button class=\"btn btn-link collapsed\" data-toggle=\"collapse\" data-target=\"#collapseThree\" aria-expanded=\"false\" aria-controls=\"collapseThree\">\n          Collapsible Group Item #3\n        <\/button>\n      <\/h5>\n    <\/div>\n    <div id=\"collapseThree\" class=\"collapse\" aria-labelledby=\"headingThree\" data-parent=\"#accordion\">\n      <div class=\"card-body\">\n        Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS.\n      <\/div>\n    <\/div>\n  <\/div>\n<\/div>\n```\n## Accessibility\nBe sure to add `aria-expanded` to the control element. This attribute explicitly conveys the current state of the collapsible element tied to the control to screen readers and similar assistive technologies. If the collapsible element is closed by default, the attribute on the control element should have a value of `aria-expanded=\"false\"`. If you’ve set the collapsible element to be open by default using the `show` class, set `aria-expanded=\"true\"` on the control instead. The plugin will automatically toggle this attribute on the control based on whether or not the collapsible element has been opened or closed (via JavaScript, or because the user triggered another control element also tied to the same collapsbile element). If the control element’s HTML element is not a button (e.g., an `<a>` or `<div>`), the attribute `role=\"button\"` should be added to the element.\n\nIf your control element is targeting a single collapsible element – i.e. the `data-target` attribute is pointing to an `id` selector – you should add the `aria-controls` attribute to the control element, containing the `id` of the collapsible element. Modern screen readers and similar assistive technologies make use of this attribute to provide users with additional shortcuts to navigate directly to the collapsible element itself.\n\nNote that Bootstrap’s current implementation does not cover the various keyboard interactions described in the [WAI-ARIA Authoring Practices 1.1 accordion pattern](https:\/\/www.w3.org\/TR\/wai-aria-practices-1.1\/#accordion) - you will need to include these yourself with custom JavaScript.\n\n## Usage\nThe collapse plugin utilizes a few classes to handle the heavy lifting:\n\n- `.collapse` hides the content\n- `.collapse.show` shows the content\n- `.collapsing` is added when the transition starts, and removed when it finishes\n\nThese classes can be found in `_transitions.scss`.\n\n### Via data attributes\nJust add `data-toggle=\"collapse\"` and a `data-target` to the element to automatically assign control of one or more collapsible elements. The `data-target` attribute accepts a CSS selector to apply the collapse to. Be sure to add the class `collapse` to the collapsible element. If you’d like it to default open, add the additional class `show`.\n\nTo add accordion-like group management to a collapsible area, add the data attribute `data-parent=\"#selector\"`. Refer to the demo to see this in action.\n\n### Via JavaScript\nEnable manually with:\n```\n$('.collapse').collapse()\n```\n### Options\nOptions can be passed via data attributes or JavaScript. For data attributes, append the option name to `data-`, as in `data-parent=\"\"`.\n\n| Name | Type | Default | Description |\n|---|---|---|---|\n| parent | selector \\| jQuery object \\| DOM element | false | If parent is provided, then all collapsible elements under the specified parent will be closed when this collapsible item is shown. (similar to traditional accordion behavior - this is dependent on the `card` class). The attribute has to be set on the target collapsible area. |\n| toggle | boolean | true | Toggles the collapsible element on invocation |\n### Methods\n#### Asynchronous methods and transitions\nAll API methods are **asynchronous** and start a **transition**. They return to the caller as soon as the transition is started but **before it ends**. In addition, a method call on a **transitioning component will be ignored**.\n\n[See our JavaScript documentation for more information.](https:\/\/getbootstrap.com\/docs\/4.0\/getting-started\/javascript\/)\n#### `.collapse(options)`\nActivates your content as a collapsible element. Accepts an optional options `object`.\n```\n$('#myCollapsible').collapse({\n  toggle: false\n})\n```\n#### `.collapse('toggle')`\nToggles a collapsible element to shown or hidden. **Returns to the caller before the collapsible element has actually been shown or hidden** (i.e. before the `shown.bs.collapse` or `hidden.bs.collapse` event occurs).\n\n#### `.collapse('show')`\nShows a collapsible element. **Returns to the caller before the collapsible element has actually been shown** (i.e. before the `shown.bs.collapse` event occurs).\n\n#### `.collapse('hide')`\nHides a collapsible element. **Returns to the caller before the collapsible element has actually been hidden** (i.e. before the `hidden.bs.collapse` event occurs).\n\n#### `.collapse('dispose')`\nDestroys an element’s collapse.\n\n### Events\nBootstrap’s collapse class exposes a few events for hooking into collapse functionality.\n\n| Event Type | Description |\n|---|---|\n| show.bs.collapse | This event fires immediately when the `show` instance method is called. |\n| shown.bs.collapse | This event is fired when a collapse element has been made visible to the user (will wait for CSS transitions to complete). |\n| hide.bs.collapse | This event is fired immediately when the `hide` method has been called. |\n| hidden.bs.collapse | This event is fired when a collapse element has been hidden from the user (will wait for CSS transitions to complete). |\n```\n$('#myCollapsible').on('hidden.bs.collapse', function () {\n  \/\/ do something…\n})\n```","meta_canonical":null}

3. Robots.txt Check

Query:

Response:

4. Spam/Ban Check

Query:

Response:

5. Seen Status Check

ℹ️ Skipped - page is already crawled

📄

INDEXABLE

✅

CRAWLED

1 day ago

🤖

ROBOTS ALLOWED

Page Info Filters

Filter	Status	Condition	Details
HTTP status	PASS	`download_http_code = 200`	HTTP 200
Age cutoff	PASS	`download_stamp > now() - 6 MONTH`	0 months ago
History drop	PASS	`isNull(history_drop_reason)`	No drop reason
Spam/ban	PASS	`fh_dont_index != 1 AND ml_spam_score = 0`	ml_spam_score=0
Canonical	PASS	`meta_canonical IS NULL OR = '' OR = src_unparsed`	Not set

Page Details

Property	Value
URL	https://getbootstrap.com/docs/4.0/components/collapse/
Last Crawled	2026-04-07 01:07:09 (1 day ago)
First Indexed	2017-08-17 22:01:06 (8 years ago)
HTTP Status Code	200
Meta Title	Collapse · Bootstrap
Meta Description	Toggle the visibility of content across your project with a few classes and our JavaScript plugins.
Meta Canonical	null
Boilerpipe Text	Toggle the visibility of content across your project with a few classes and our JavaScript plugins. Example Click the buttons below to show and hide another element via class changes: .collapse hides content .collapsing is applied during transitions .collapse.show shows content You can use a link with the href attribute, or a button with the data-target attribute. In both cases, the data-toggle="collapse" is required. Link with href Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. <p> <a class= "btn btn-primary" data-toggle= "collapse" href= "#collapseExample" role= "button" aria-expanded= "false" aria-controls= "collapseExample" > Link with href </a> <button class= "btn btn-primary" type= "button" data-toggle= "collapse" data-target= "#collapseExample" aria-expanded= "false" aria-controls= "collapseExample" > Button with data-target </button> </p> <div class= "collapse" id= "collapseExample" > <div class= "card card-body" > Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. </div> </div> Multiple targets A <button> or <a> can show and hide multiple elements by referencing them with a JQuery selector in its href or data-target attribute. Multiple <button> or <a> can show and hide an element if they each reference it with their href or data-target attribute Toggle first element Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. <p> <a class= "btn btn-primary" data-toggle= "collapse" href= "#multiCollapseExample1" role= "button" aria-expanded= "false" aria-controls= "multiCollapseExample1" > Toggle first element </a> <button class= "btn btn-primary" type= "button" data-toggle= "collapse" data-target= "#multiCollapseExample2" aria-expanded= "false" aria-controls= "multiCollapseExample2" > Toggle second element </button> <button class= "btn btn-primary" type= "button" data-toggle= "collapse" data-target= ".multi-collapse" aria-expanded= "false" aria-controls= "multiCollapseExample1 multiCollapseExample2" > Toggle both elements </button> </p> <div class= "row" > <div class= "col" > <div class= "collapse multi-collapse" id= "multiCollapseExample1" > <div class= "card card-body" > Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. </div> </div> </div> <div class= "col" > <div class= "collapse multi-collapse" id= "multiCollapseExample2" > <div class= "card card-body" > Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. </div> </div> </div> </div> Accordion example Using the card component, you can extend the default collapse behavior to create an accordion. Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS. Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS. Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS. <div id= "accordion" > <div class= "card" > <div class= "card-header" id= "headingOne" > <h5 class= "mb-0" > <button class= "btn btn-link" data-toggle= "collapse" data-target= "#collapseOne" aria-expanded= "true" aria-controls= "collapseOne" > Collapsible Group Item #1 </button> </h5> </div> <div id= "collapseOne" class= "collapse show" aria-labelledby= "headingOne" data-parent= "#accordion" > <div class= "card-body" > Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS. </div> </div> </div> <div class= "card" > <div class= "card-header" id= "headingTwo" > <h5 class= "mb-0" > <button class= "btn btn-link collapsed" data-toggle= "collapse" data-target= "#collapseTwo" aria-expanded= "false" aria-controls= "collapseTwo" > Collapsible Group Item #2 </button> </h5> </div> <div id= "collapseTwo" class= "collapse" aria-labelledby= "headingTwo" data-parent= "#accordion" > <div class= "card-body" > Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS. </div> </div> </div> <div class= "card" > <div class= "card-header" id= "headingThree" > <h5 class= "mb-0" > <button class= "btn btn-link collapsed" data-toggle= "collapse" data-target= "#collapseThree" aria-expanded= "false" aria-controls= "collapseThree" > Collapsible Group Item #3 </button> </h5> </div> <div id= "collapseThree" class= "collapse" aria-labelledby= "headingThree" data-parent= "#accordion" > <div class= "card-body" > Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS. </div> </div> </div> </div> Accessibility Be sure to add aria-expanded to the control element. This attribute explicitly conveys the current state of the collapsible element tied to the control to screen readers and similar assistive technologies. If the collapsible element is closed by default, the attribute on the control element should have a value of aria-expanded="false" . If you’ve set the collapsible element to be open by default using the show class, set aria-expanded="true" on the control instead. The plugin will automatically toggle this attribute on the control based on whether or not the collapsible element has been opened or closed (via JavaScript, or because the user triggered another control element also tied to the same collapsbile element). If the control element’s HTML element is not a button (e.g., an <a> or <div> ), the attribute role="button" should be added to the element. If your control element is targeting a single collapsible element – i.e. the data-target attribute is pointing to an id selector – you should add the aria-controls attribute to the control element, containing the id of the collapsible element. Modern screen readers and similar assistive technologies make use of this attribute to provide users with additional shortcuts to navigate directly to the collapsible element itself. Note that Bootstrap’s current implementation does not cover the various keyboard interactions described in the WAI-ARIA Authoring Practices 1.1 accordion pattern - you will need to include these yourself with custom JavaScript. Usage The collapse plugin utilizes a few classes to handle the heavy lifting: .collapse hides the content .collapse.show shows the content .collapsing is added when the transition starts, and removed when it finishes These classes can be found in _transitions.scss . Via data attributes Just add data-toggle="collapse" and a data-target to the element to automatically assign control of one or more collapsible elements. The data-target attribute accepts a CSS selector to apply the collapse to. Be sure to add the class collapse to the collapsible element. If you’d like it to default open, add the additional class show . To add accordion-like group management to a collapsible area, add the data attribute data-parent="#selector" . Refer to the demo to see this in action. Via JavaScript Enable manually with: $ ( '.collapse' ). collapse () Options Options can be passed via data attributes or JavaScript. For data attributes, append the option name to data- , as in data-parent="" . Name Type Default Description parent selector \| jQuery object \| DOM element false If parent is provided, then all collapsible elements under the specified parent will be closed when this collapsible item is shown. (similar to traditional accordion behavior - this is dependent on the card class). The attribute has to be set on the target collapsible area. toggle boolean true Toggles the collapsible element on invocation Methods Asynchronous methods and transitions All API methods are asynchronous and start a transition . They return to the caller as soon as the transition is started but before it ends . In addition, a method call on a transitioning component will be ignored . See our JavaScript documentation for more information. .collapse(options) Activates your content as a collapsible element. Accepts an optional options object . $ ( '#myCollapsible' ). collapse ({ toggle : false }) .collapse('toggle') Toggles a collapsible element to shown or hidden. Returns to the caller before the collapsible element has actually been shown or hidden (i.e. before the shown.bs.collapse or hidden.bs.collapse event occurs). .collapse('show') Shows a collapsible element. Returns to the caller before the collapsible element has actually been shown (i.e. before the shown.bs.collapse event occurs). .collapse('hide') Hides a collapsible element. Returns to the caller before the collapsible element has actually been hidden (i.e. before the hidden.bs.collapse event occurs). .collapse('dispose') Destroys an element’s collapse. Events Bootstrap’s collapse class exposes a few events for hooking into collapse functionality. Event Type Description show.bs.collapse This event fires immediately when the show instance method is called. shown.bs.collapse This event is fired when a collapse element has been made visible to the user (will wait for CSS transitions to complete). hide.bs.collapse This event is fired immediately when the hide method has been called. hidden.bs.collapse This event is fired when a collapse element has been hidden from the user (will wait for CSS transitions to complete). $ ( '#myCollapsible' ). on ( 'hidden.bs.collapse' , function () { // do something… })
Markdown	[Skip to main content](https://getbootstrap.com/docs/4.0/components/collapse/#content) [There's a newer version of Bootstrap\!](https://getbootstrap.com/) - [Home](https://getbootstrap.com/) - [Documentation](https://getbootstrap.com/docs/4.0/getting-started/introduction/) - [Examples](https://getbootstrap.com/docs/4.0/examples/) - [Expo](https://expo.getbootstrap.com/) - [Blog](https://blog.getbootstrap.com/) - [v4.0](https://getbootstrap.com/docs/4.0/components/collapse/) [Latest (v4.1.x)](https://getbootstrap.com/docs/4.1/) [v4.0.0](https://getbootstrap.com/docs/4.0/) [v4 Alpha 6](https://v4-alpha.getbootstrap.com/) [v3.3.7](https://getbootstrap.com/docs/3.3/) [v2.3.2](https://getbootstrap.com/2.3.2/) [Download](https://github.com/twbs/bootstrap/archive/v4.0.0.zip) [Getting started](https://getbootstrap.com/docs/4.0/getting-started/introduction/) - [Introduction](https://getbootstrap.com/docs/4.0/getting-started/introduction/) - [Download](https://getbootstrap.com/docs/4.0/getting-started/download/) - [Contents](https://getbootstrap.com/docs/4.0/getting-started/contents/) - [Browsers & devices](https://getbootstrap.com/docs/4.0/getting-started/browsers-devices/) - [JavaScript](https://getbootstrap.com/docs/4.0/getting-started/javascript/) - [Theming](https://getbootstrap.com/docs/4.0/getting-started/theming/) - [Build tools](https://getbootstrap.com/docs/4.0/getting-started/build-tools/) - [Webpack](https://getbootstrap.com/docs/4.0/getting-started/webpack/) - [Accessibility](https://getbootstrap.com/docs/4.0/getting-started/accessibility/) [Layout](https://getbootstrap.com/docs/4.0/layout/overview/) - [Overview](https://getbootstrap.com/docs/4.0/layout/overview/) - [Grid](https://getbootstrap.com/docs/4.0/layout/grid/) - [Media object](https://getbootstrap.com/docs/4.0/layout/media-object/) - [Utilities for layout](https://getbootstrap.com/docs/4.0/layout/utilities-for-layout/) [Content](https://getbootstrap.com/docs/4.0/content/reboot/) - [Reboot](https://getbootstrap.com/docs/4.0/content/reboot/) - [Typography](https://getbootstrap.com/docs/4.0/content/typography/) - [Code](https://getbootstrap.com/docs/4.0/content/code/) - [Images](https://getbootstrap.com/docs/4.0/content/images/) - [Tables](https://getbootstrap.com/docs/4.0/content/tables/) - [Figures](https://getbootstrap.com/docs/4.0/content/figures/) [Components](https://getbootstrap.com/docs/4.0/components/alerts/) - [Alerts](https://getbootstrap.com/docs/4.0/components/alerts/) - [Badge](https://getbootstrap.com/docs/4.0/components/badge/) - [Breadcrumb](https://getbootstrap.com/docs/4.0/components/breadcrumb/) - [Buttons](https://getbootstrap.com/docs/4.0/components/buttons/) - [Button group](https://getbootstrap.com/docs/4.0/components/button-group/) - [Card](https://getbootstrap.com/docs/4.0/components/card/) - [Carousel](https://getbootstrap.com/docs/4.0/components/carousel/) - [Collapse](https://getbootstrap.com/docs/4.0/components/collapse/) - [Dropdowns](https://getbootstrap.com/docs/4.0/components/dropdowns/) - [Forms](https://getbootstrap.com/docs/4.0/components/forms/) - [Input group](https://getbootstrap.com/docs/4.0/components/input-group/) - [Jumbotron](https://getbootstrap.com/docs/4.0/components/jumbotron/) - [List group](https://getbootstrap.com/docs/4.0/components/list-group/) - [Modal](https://getbootstrap.com/docs/4.0/components/modal/) - [Navs](https://getbootstrap.com/docs/4.0/components/navs/) - [Navbar](https://getbootstrap.com/docs/4.0/components/navbar/) - [Pagination](https://getbootstrap.com/docs/4.0/components/pagination/) - [Popovers](https://getbootstrap.com/docs/4.0/components/popovers/) - [Progress](https://getbootstrap.com/docs/4.0/components/progress/) - [Scrollspy](https://getbootstrap.com/docs/4.0/components/scrollspy/) - [Tooltips](https://getbootstrap.com/docs/4.0/components/tooltips/) [Utilities](https://getbootstrap.com/docs/4.0/utilities/borders/) - [Borders](https://getbootstrap.com/docs/4.0/utilities/borders/) - [Clearfix](https://getbootstrap.com/docs/4.0/utilities/clearfix/) - [Close icon](https://getbootstrap.com/docs/4.0/utilities/close-icon/) - [Colors](https://getbootstrap.com/docs/4.0/utilities/colors/) - [Display](https://getbootstrap.com/docs/4.0/utilities/display/) - [Embed](https://getbootstrap.com/docs/4.0/utilities/embed/) - [Flex](https://getbootstrap.com/docs/4.0/utilities/flex/) - [Float](https://getbootstrap.com/docs/4.0/utilities/float/) - [Image replacement](https://getbootstrap.com/docs/4.0/utilities/image-replacement/) - [Position](https://getbootstrap.com/docs/4.0/utilities/position/) - [Screenreaders](https://getbootstrap.com/docs/4.0/utilities/screenreaders/) - [Sizing](https://getbootstrap.com/docs/4.0/utilities/sizing/) - [Spacing](https://getbootstrap.com/docs/4.0/utilities/spacing/) - [Text](https://getbootstrap.com/docs/4.0/utilities/text/) - [Vertical align](https://getbootstrap.com/docs/4.0/utilities/vertical-align/) - [Visibility](https://getbootstrap.com/docs/4.0/utilities/visibility/) [Extend](https://getbootstrap.com/docs/4.0/extend/approach/) - [Approach](https://getbootstrap.com/docs/4.0/extend/approach/) - [Icons](https://getbootstrap.com/docs/4.0/extend/icons/) [Migration](https://getbootstrap.com/docs/4.0/migration/) [About](https://getbootstrap.com/docs/4.0/about/overview/) - [Overview](https://getbootstrap.com/docs/4.0/about/overview/) - [Brand](https://getbootstrap.com/docs/4.0/about/brand/) - [License](https://getbootstrap.com/docs/4.0/about/license/) - [Translations](https://getbootstrap.com/docs/4.0/about/translations/) - [Example](https://getbootstrap.com/docs/4.0/components/collapse/#example) - [Multiple targets](https://getbootstrap.com/docs/4.0/components/collapse/#multiple-targets) - [Accordion example](https://getbootstrap.com/docs/4.0/components/collapse/#accordion-example) - [Accessibility](https://getbootstrap.com/docs/4.0/components/collapse/#accessibility) - [Usage](https://getbootstrap.com/docs/4.0/components/collapse/#usage) - [Via data attributes](https://getbootstrap.com/docs/4.0/components/collapse/#via-data-attributes) - [Via JavaScript](https://getbootstrap.com/docs/4.0/components/collapse/#via-javascript) - [Options](https://getbootstrap.com/docs/4.0/components/collapse/#options) - [Methods](https://getbootstrap.com/docs/4.0/components/collapse/#methods) - [Asynchronous methods and transitions](https://getbootstrap.com/docs/4.0/components/collapse/#asynchronous-methods-and-transitions) - [.collapse(options)](https://getbootstrap.com/docs/4.0/components/collapse/#collapseoptions) - [.collapse('toggle')](https://getbootstrap.com/docs/4.0/components/collapse/#collapsetoggle) - [.collapse('show')](https://getbootstrap.com/docs/4.0/components/collapse/#collapseshow) - [.collapse('hide')](https://getbootstrap.com/docs/4.0/components/collapse/#collapsehide) - [.collapse('dispose')](https://getbootstrap.com/docs/4.0/components/collapse/#collapsedispose) - [Events](https://getbootstrap.com/docs/4.0/components/collapse/#events) # Collapse Toggle the visibility of content across your project with a few classes and our JavaScript plugins. ## Example Click the buttons below to show and hide another element via class changes: - `.collapse` hides content - `.collapsing` is applied during transitions - `.collapse.show` shows content You can use a link with the `href` attribute, or a button with the `data-target` attribute. In both cases, the `data-toggle="collapse"` is required. [Link with href](https://getbootstrap.com/docs/4.0/components/collapse/#collapseExample) Button with data-target Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Copy ``` <p> <a class="btn btn-primary" data-toggle="collapse" href="#collapseExample" role="button" aria-expanded="false" aria-controls="collapseExample"> Link with href </a> <button class="btn btn-primary" type="button" data-toggle="collapse" data-target="#collapseExample" aria-expanded="false" aria-controls="collapseExample"> Button with data-target </button> </p> <div class="collapse" id="collapseExample"> <div class="card card-body"> Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. </div> </div> ``` ## Multiple targets A `<button>` or `<a>` can show and hide multiple elements by referencing them with a JQuery selector in its `href` or `data-target` attribute. Multiple `<button>` or `<a>` can show and hide an element if they each reference it with their `href` or `data-target` attribute [Toggle first element](https://getbootstrap.com/docs/4.0/components/collapse/#multiCollapseExample1) Toggle second element Toggle both elements Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Copy ``` <p> <a class="btn btn-primary" data-toggle="collapse" href="#multiCollapseExample1" role="button" aria-expanded="false" aria-controls="multiCollapseExample1">Toggle first element</a> <button class="btn btn-primary" type="button" data-toggle="collapse" data-target="#multiCollapseExample2" aria-expanded="false" aria-controls="multiCollapseExample2">Toggle second element</button> <button class="btn btn-primary" type="button" data-toggle="collapse" data-target=".multi-collapse" aria-expanded="false" aria-controls="multiCollapseExample1 multiCollapseExample2">Toggle both elements</button> </p> <div class="row"> <div class="col"> <div class="collapse multi-collapse" id="multiCollapseExample1"> <div class="card card-body"> Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. </div> </div> </div> <div class="col"> <div class="collapse multi-collapse" id="multiCollapseExample2"> <div class="card card-body"> Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. </div> </div> </div> </div> ``` ## Accordion example Using the [card](https://getbootstrap.com/docs/4.0/components/card/) component, you can extend the default collapse behavior to create an accordion. ##### Collapsible Group Item \#1 Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS. ##### Collapsible Group Item \#2 Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS. ##### Collapsible Group Item \#3 Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS. Copy ``` <div id="accordion"> <div class="card"> <div class="card-header" id="headingOne"> <h5 class="mb-0"> <button class="btn btn-link" data-toggle="collapse" data-target="#collapseOne" aria-expanded="true" aria-controls="collapseOne"> Collapsible Group Item #1 </button> </h5> </div> <div id="collapseOne" class="collapse show" aria-labelledby="headingOne" data-parent="#accordion"> <div class="card-body"> Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS. </div> </div> </div> <div class="card"> <div class="card-header" id="headingTwo"> <h5 class="mb-0"> <button class="btn btn-link collapsed" data-toggle="collapse" data-target="#collapseTwo" aria-expanded="false" aria-controls="collapseTwo"> Collapsible Group Item #2 </button> </h5> </div> <div id="collapseTwo" class="collapse" aria-labelledby="headingTwo" data-parent="#accordion"> <div class="card-body"> Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS. </div> </div> </div> <div class="card"> <div class="card-header" id="headingThree"> <h5 class="mb-0"> <button class="btn btn-link collapsed" data-toggle="collapse" data-target="#collapseThree" aria-expanded="false" aria-controls="collapseThree"> Collapsible Group Item #3 </button> </h5> </div> <div id="collapseThree" class="collapse" aria-labelledby="headingThree" data-parent="#accordion"> <div class="card-body"> Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS. </div> </div> </div> </div> ``` ## Accessibility Be sure to add `aria-expanded` to the control element. This attribute explicitly conveys the current state of the collapsible element tied to the control to screen readers and similar assistive technologies. If the collapsible element is closed by default, the attribute on the control element should have a value of `aria-expanded="false"`. If you’ve set the collapsible element to be open by default using the `show` class, set `aria-expanded="true"` on the control instead. The plugin will automatically toggle this attribute on the control based on whether or not the collapsible element has been opened or closed (via JavaScript, or because the user triggered another control element also tied to the same collapsbile element). If the control element’s HTML element is not a button (e.g., an `<a>` or `<div>`), the attribute `role="button"` should be added to the element. If your control element is targeting a single collapsible element – i.e. the `data-target` attribute is pointing to an `id` selector – you should add the `aria-controls` attribute to the control element, containing the `id` of the collapsible element. Modern screen readers and similar assistive technologies make use of this attribute to provide users with additional shortcuts to navigate directly to the collapsible element itself. Note that Bootstrap’s current implementation does not cover the various keyboard interactions described in the [WAI-ARIA Authoring Practices 1.1 accordion pattern](https://www.w3.org/TR/wai-aria-practices-1.1/#accordion) - you will need to include these yourself with custom JavaScript. ## Usage The collapse plugin utilizes a few classes to handle the heavy lifting: - `.collapse` hides the content - `.collapse.show` shows the content - `.collapsing` is added when the transition starts, and removed when it finishes These classes can be found in `_transitions.scss`. ### Via data attributes Just add `data-toggle="collapse"` and a `data-target` to the element to automatically assign control of one or more collapsible elements. The `data-target` attribute accepts a CSS selector to apply the collapse to. Be sure to add the class `collapse` to the collapsible element. If you’d like it to default open, add the additional class `show`. To add accordion-like group management to a collapsible area, add the data attribute `data-parent="#selector"`. Refer to the demo to see this in action. ### Via JavaScript Enable manually with: Copy ``` $('.collapse').collapse() ``` ### Options Options can be passed via data attributes or JavaScript. For data attributes, append the option name to `data-`, as in `data-parent=""`. \| Name \| Type \| Default \| Description \| \|---\|---\|---\|---\| \| parent \| selector \\| jQuery object \\| DOM element \| false \| If parent is provided, then all collapsible elements under the specified parent will be closed when this collapsible item is shown. (similar to traditional accordion behavior - this is dependent on the `card` class). The attribute has to be set on the target collapsible area. \| \| toggle \| boolean \| true \| Toggles the collapsible element on invocation \| ### Methods #### Asynchronous methods and transitions All API methods are asynchronous and start a transition. They return to the caller as soon as the transition is started but before it ends. In addition, a method call on a transitioning component will be ignored. [See our JavaScript documentation for more information.](https://getbootstrap.com/docs/4.0/getting-started/javascript/) #### `.collapse(options)` Activates your content as a collapsible element. Accepts an optional options `object`. Copy ``` $('#myCollapsible').collapse({ toggle: false }) ``` #### `.collapse('toggle')` Toggles a collapsible element to shown or hidden. Returns to the caller before the collapsible element has actually been shown or hidden (i.e. before the `shown.bs.collapse` or `hidden.bs.collapse` event occurs). #### `.collapse('show')` Shows a collapsible element. Returns to the caller before the collapsible element has actually been shown (i.e. before the `shown.bs.collapse` event occurs). #### `.collapse('hide')` Hides a collapsible element. Returns to the caller before the collapsible element has actually been hidden (i.e. before the `hidden.bs.collapse` event occurs). #### `.collapse('dispose')` Destroys an element’s collapse. ### Events Bootstrap’s collapse class exposes a few events for hooking into collapse functionality. \| Event Type \| Description \| \|---\|---\| \| show.bs.collapse \| This event fires immediately when the `show` instance method is called. \| \| shown.bs.collapse \| This event is fired when a collapse element has been made visible to the user (will wait for CSS transitions to complete). \| \| hide.bs.collapse \| This event is fired immediately when the `hide` method has been called. \| \| hidden.bs.collapse \| This event is fired when a collapse element has been hidden from the user (will wait for CSS transitions to complete). \| Copy ``` $('#myCollapsible').on('hidden.bs.collapse', function () { // do something… }) ```
Readable Markdown	Toggle the visibility of content across your project with a few classes and our JavaScript plugins. ## Example Click the buttons below to show and hide another element via class changes: - `.collapse` hides content - `.collapsing` is applied during transitions - `.collapse.show` shows content You can use a link with the `href` attribute, or a button with the `data-target` attribute. In both cases, the `data-toggle="collapse"` is required. [Link with href](https://getbootstrap.com/docs/4.0/components/collapse/#collapseExample) Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. ``` <p> <a class="btn btn-primary" data-toggle="collapse" href="#collapseExample" role="button" aria-expanded="false" aria-controls="collapseExample"> Link with href </a> <button class="btn btn-primary" type="button" data-toggle="collapse" data-target="#collapseExample" aria-expanded="false" aria-controls="collapseExample"> Button with data-target </button> </p> <div class="collapse" id="collapseExample"> <div class="card card-body"> Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. </div> </div> ``` ## Multiple targets A `<button>` or `<a>` can show and hide multiple elements by referencing them with a JQuery selector in its `href` or `data-target` attribute. Multiple `<button>` or `<a>` can show and hide an element if they each reference it with their `href` or `data-target` attribute [Toggle first element](https://getbootstrap.com/docs/4.0/components/collapse/#multiCollapseExample1) Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. ``` <p> <a class="btn btn-primary" data-toggle="collapse" href="#multiCollapseExample1" role="button" aria-expanded="false" aria-controls="multiCollapseExample1">Toggle first element</a> <button class="btn btn-primary" type="button" data-toggle="collapse" data-target="#multiCollapseExample2" aria-expanded="false" aria-controls="multiCollapseExample2">Toggle second element</button> <button class="btn btn-primary" type="button" data-toggle="collapse" data-target=".multi-collapse" aria-expanded="false" aria-controls="multiCollapseExample1 multiCollapseExample2">Toggle both elements</button> </p> <div class="row"> <div class="col"> <div class="collapse multi-collapse" id="multiCollapseExample1"> <div class="card card-body"> Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. </div> </div> </div> <div class="col"> <div class="collapse multi-collapse" id="multiCollapseExample2"> <div class="card card-body"> Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. </div> </div> </div> </div> ``` ## Accordion example Using the [card](https://getbootstrap.com/docs/4.0/components/card/) component, you can extend the default collapse behavior to create an accordion. Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS. Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS. Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS. ``` <div id="accordion"> <div class="card"> <div class="card-header" id="headingOne"> <h5 class="mb-0"> <button class="btn btn-link" data-toggle="collapse" data-target="#collapseOne" aria-expanded="true" aria-controls="collapseOne"> Collapsible Group Item #1 </button> </h5> </div> <div id="collapseOne" class="collapse show" aria-labelledby="headingOne" data-parent="#accordion"> <div class="card-body"> Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS. </div> </div> </div> <div class="card"> <div class="card-header" id="headingTwo"> <h5 class="mb-0"> <button class="btn btn-link collapsed" data-toggle="collapse" data-target="#collapseTwo" aria-expanded="false" aria-controls="collapseTwo"> Collapsible Group Item #2 </button> </h5> </div> <div id="collapseTwo" class="collapse" aria-labelledby="headingTwo" data-parent="#accordion"> <div class="card-body"> Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS. </div> </div> </div> <div class="card"> <div class="card-header" id="headingThree"> <h5 class="mb-0"> <button class="btn btn-link collapsed" data-toggle="collapse" data-target="#collapseThree" aria-expanded="false" aria-controls="collapseThree"> Collapsible Group Item #3 </button> </h5> </div> <div id="collapseThree" class="collapse" aria-labelledby="headingThree" data-parent="#accordion"> <div class="card-body"> Anim pariatur cliche reprehenderit, enim eiusmod high life accusamus terry richardson ad squid. 3 wolf moon officia aute, non cupidatat skateboard dolor brunch. Food truck quinoa nesciunt laborum eiusmod. Brunch 3 wolf moon tempor, sunt aliqua put a bird on it squid single-origin coffee nulla assumenda shoreditch et. Nihil anim keffiyeh helvetica, craft beer labore wes anderson cred nesciunt sapiente ea proident. Ad vegan excepteur butcher vice lomo. Leggings occaecat craft beer farm-to-table, raw denim aesthetic synth nesciunt you probably haven't heard of them accusamus labore sustainable VHS. </div> </div> </div> </div> ``` ## Accessibility Be sure to add `aria-expanded` to the control element. This attribute explicitly conveys the current state of the collapsible element tied to the control to screen readers and similar assistive technologies. If the collapsible element is closed by default, the attribute on the control element should have a value of `aria-expanded="false"`. If you’ve set the collapsible element to be open by default using the `show` class, set `aria-expanded="true"` on the control instead. The plugin will automatically toggle this attribute on the control based on whether or not the collapsible element has been opened or closed (via JavaScript, or because the user triggered another control element also tied to the same collapsbile element). If the control element’s HTML element is not a button (e.g., an `<a>` or `<div>`), the attribute `role="button"` should be added to the element. If your control element is targeting a single collapsible element – i.e. the `data-target` attribute is pointing to an `id` selector – you should add the `aria-controls` attribute to the control element, containing the `id` of the collapsible element. Modern screen readers and similar assistive technologies make use of this attribute to provide users with additional shortcuts to navigate directly to the collapsible element itself. Note that Bootstrap’s current implementation does not cover the various keyboard interactions described in the [WAI-ARIA Authoring Practices 1.1 accordion pattern](https://www.w3.org/TR/wai-aria-practices-1.1/#accordion) - you will need to include these yourself with custom JavaScript. ## Usage The collapse plugin utilizes a few classes to handle the heavy lifting: - `.collapse` hides the content - `.collapse.show` shows the content - `.collapsing` is added when the transition starts, and removed when it finishes These classes can be found in `_transitions.scss`. ### Via data attributes Just add `data-toggle="collapse"` and a `data-target` to the element to automatically assign control of one or more collapsible elements. The `data-target` attribute accepts a CSS selector to apply the collapse to. Be sure to add the class `collapse` to the collapsible element. If you’d like it to default open, add the additional class `show`. To add accordion-like group management to a collapsible area, add the data attribute `data-parent="#selector"`. Refer to the demo to see this in action. ### Via JavaScript Enable manually with: ``` $('.collapse').collapse() ``` ### Options Options can be passed via data attributes or JavaScript. For data attributes, append the option name to `data-`, as in `data-parent=""`. \| Name \| Type \| Default \| Description \| \|---\|---\|---\|---\| \| parent \| selector \\| jQuery object \\| DOM element \| false \| If parent is provided, then all collapsible elements under the specified parent will be closed when this collapsible item is shown. (similar to traditional accordion behavior - this is dependent on the `card` class). The attribute has to be set on the target collapsible area. \| \| toggle \| boolean \| true \| Toggles the collapsible element on invocation \| ### Methods #### Asynchronous methods and transitions All API methods are asynchronous and start a transition. They return to the caller as soon as the transition is started but before it ends. In addition, a method call on a transitioning component will be ignored. [See our JavaScript documentation for more information.](https://getbootstrap.com/docs/4.0/getting-started/javascript/) #### `.collapse(options)` Activates your content as a collapsible element. Accepts an optional options `object`. ``` $('#myCollapsible').collapse({ toggle: false }) ``` #### `.collapse('toggle')` Toggles a collapsible element to shown or hidden. Returns to the caller before the collapsible element has actually been shown or hidden (i.e. before the `shown.bs.collapse` or `hidden.bs.collapse` event occurs). #### `.collapse('show')` Shows a collapsible element. Returns to the caller before the collapsible element has actually been shown (i.e. before the `shown.bs.collapse` event occurs). #### `.collapse('hide')` Hides a collapsible element. Returns to the caller before the collapsible element has actually been hidden (i.e. before the `hidden.bs.collapse` event occurs). #### `.collapse('dispose')` Destroys an element’s collapse. ### Events Bootstrap’s collapse class exposes a few events for hooking into collapse functionality. \| Event Type \| Description \| \|---\|---\| \| show.bs.collapse \| This event fires immediately when the `show` instance method is called. \| \| shown.bs.collapse \| This event is fired when a collapse element has been made visible to the user (will wait for CSS transitions to complete). \| \| hide.bs.collapse \| This event is fired immediately when the `hide` method has been called. \| \| hidden.bs.collapse \| This event is fired when a collapse element has been hidden from the user (will wait for CSS transitions to complete). \| ``` $('#myCollapsible').on('hidden.bs.collapse', function () { // do something… }) ```
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