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role="listitem">Indonesia</a> <a class="-tw" href="/ja/documentation/components/amp-accordion/" role="listitem">日本語</a> <a class="-tw" href="/ko/documentation/components/amp-accordion/" role="listitem">한국어</a> <a class="-tw" href="/pt_br/documentation/components/amp-accordion/" role="listitem">Português</a> <a class="-tw" href="/ru/documentation/components/amp-accordion/" role="listitem">Русский</a> <a class="-tw" href="/tr/documentation/components/amp-accordion/" role="listitem">Türkçe</a> <a class="-tw" href="/zh_cn/documentation/components/amp-accordion/" role="listitem">中文</a> <a class="-tw" href="/pl/documentation/components/amp-accordion/" role="listitem">Polski</a> <a class="-tw" href="/vi/documentation/components/amp-accordion/" role="listitem">Tiếng việt</a> </div> </div> </div> </header> <label class="ap-o-burger-menu-label" on="tap:AMP.setState({mainmenuopen: !mainmenuopen, noScrollState: !noScrollState})" [class]="'ap-o-burger-menu-label ' + (mainmenuopen ? 'mainmenuopen ' : '')" for="burger-menu" tabindex="0" role="button" aria-label="Burger Menu" i-amphtml-binding> <div class="ap-a-ico ap-o-burger-menu-icon"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#menu"/></svg> </div> </label> <nav class="ap-o-burger-menu" [class]="mainmenuopen ? 'ap-o-burger-menu mainmenuopen' : 'ap-o-burger-menu'" i-amphtml-binding> <ul class="-th"> <li class="-tp"> <label class="ap-o-burger-menu-link -tw "> About </label> <input class="-td" type="checkbox" aria-label="About"> <span class="nav-icon"> <svg class="ap-a-ico"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-solid"/></svg> </span> <ul class="-th"> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/about/websites/"> AMP Websites </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/about/stories/"> Web Stories </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/about/ads/"> AMP Ads </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/about/email/"> AMP Email </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/about/how-amp-works/"> How AMP works </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/about/mission-and-vision/"> Vision & Mission </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/about/use-cases/"> Use cases </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/success-stories/"> Success Stories </a> </li> </ul> </li> <li class="-tp"> <label class="ap-o-burger-menu-link -tw active"> Documentation </label> <input class="-td" type="checkbox" aria-label="Documentation" checked> <span class="nav-icon"> <svg class="ap-a-ico"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-solid"/></svg> </span> <ul class="-th"> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/documentation/"> Get Started </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/documentation/guides-and-tutorials/"> Guides & Tutorials </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/documentation/components/"> Components </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/documentation/examples/"> Examples </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/documentation/courses/"> Courses </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/documentation/templates/"> Templates </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/documentation/tools/"> Tools </a> </li> </ul> </li> <li class="-tp"> <label class="ap-o-burger-menu-link -tw "> Community </label> <input class="-td" type="checkbox" aria-label="Community"> <span class="nav-icon"> <svg class="ap-a-ico"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-solid"/></svg> </span> <ul class="-th"> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/documentation/guides-and-tutorials/contribute/"> Contribute </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/community/roadmap/"> Roadmap </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/community/governance/"> Governance </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/community/working-groups/access-subscriptions/"> Working Groups </a> </li> </ul> </li> <li class="-tp"> <label class="ap-o-burger-menu-link -tw "> Events </label> <input class="-td" type="checkbox" aria-label="Events"> <span class="nav-icon"> <svg class="ap-a-ico"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-solid"/></svg> </span> <ul class="-th"> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/events/amp-fest-2020/"> AMP Fest 2020 </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/events/amp-roadshow/"> AMP Roadshow </a> </li> </ul> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tw" href="https://blog.amp.dev">Blog</a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tw " href="/support/"> Help </a> </li> </ul> </nav> <div class="-oc"> <amp-position-observer on="enter:slideTransition.start; exit:slideTransition.start,slideTransition.reverse" intersection-ratios="1" layout="nodisplay" class="i-amphtml-layout-nodisplay" hidden="hidden" i-amphtml-layout="nodisplay"> </amp-position-observer> <amp-animation id="slideTransition" layout="nodisplay" class="i-amphtml-layout-nodisplay" hidden="hidden" i-amphtml-layout="nodisplay"> <script type="application/json">{"duration":"150ms","fill":"both","easing":"ease-out","iterations":"1","animations":[{"selector":".label-title","keyframes":[{"transform":"scale3d(0, 1, 1)"},{"transform":"scale3d(1, 1, 1)"}]}]}</script> </amp-animation> </div> <amp-user-notification class="-fv i-amphtml-layout-nodisplay" id="format-filter-hint" layout="nodisplay" hidden="hidden" i-amphtml-layout="nodisplay"> </amp-user-notification> <div class="-fd" aria-hidden="true"> <div class="-fm"> <div class="-fg">Select your format for a more streamlined experience</div> <button class="-fy" on="tap:format-filter-hint.dismiss"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#close"/></svg> </button> </div> </div> <main class="ap--main -fb"> <div class="-tf"> <input class="-od ap-a-sidebar-mobile-toggle-input-sidebar" type="checkbox" name="sidebar" id="sidebar" autocomplete="off"> <input class="-om ap-a-sidebar-desktop-toggle-input-sidebar" type="checkbox" name="sidebar-desktop" id="sidebar-desktop" autocomplete="off"> <span id="ap--sidebar-content" class="-oy"></span> <section class="ap--toc"> <div class="ap-o-toc" [class]="contentmenuopen ? 'ap-o-toc contentmenuopen' : 'ap-o-toc'" i-amphtml-binding> <label class="ap-o-toc-toggle" for="toc" on="tap:AMP.setState({contentmenuopen: !contentmenuopen})" role="contentmenutrigger" tabindex="0"> <span class="ap-o-toc-hl">Table of contents</span> <span class="nav-icon"> <svg class="ap-a-ico"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-solid"/></svg> </span> </label> <input class="-oh -of" type="checkbox" name="toc" id="toc" autocomplete="off"> <ul><li><a href="#usage">Usage</a></li> <li><a href="#example">Example</a></li> <li><a href="#attributes">Attributes</a><ul> <li><a href="#animate">animate</a></li> <li><a href="#disable-session-states">disable-session-states</a></li> <li><a href="#expanded">expanded</a></li> <li><a href="#expand-single-section">expand-single-section</a></li> <li><a href="#[data-expand]">[data-expand]</a></li> </ul> </li> <li><a href="#actions">Actions</a><ul> <li><a href="#toggle">toggle</a></li> <li><a href="#expand">expand</a></li> <li><a href="#collapse">collapse</a></li> </ul> </li> <li><a href="#events">Events</a><ul> <li><a href="#expand_1">expand</a></li> <li><a href="#collapse_1">collapse</a></li> </ul> </li> <li><a href="#styling">Styling</a></li> <li><a href="#accessibility">Accessibility</a></li> <li><a href="#validation">Validation</a></li></ul> </div> </section> <section class="-t"> <label class="-op -ol ap-a-sidebar-mobile-toggle-label-sidebar" for="sidebar" on="tap:sidebar-left.toggle" role="categoriemenutrigger" tabindex="0"> <span class="label-icon"><svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#sidebar-toggle"/></svg></span> <span class="label-title">Toggle Sidebar</span> </label> <label class="-op -og ap-a-sidebar-desktop-toggle-label-sidebar" for="sidebar-desktop" role="categoriemenutrigger-desktop" tabindex="0"> <span class="label-icon"><svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#sidebar-toggle"/></svg></span> <span class="label-title">Toggle Sidebar</span> </label> <nav class="-ou"> <a class="ap-m-breadcrumbs-crumb" href="/documentation/">Documentation</a> <span class="ap-m-breadcrumbs-divider"> <svg class="ap-a-ico -oa"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-solid"/></svg> </span> <a class="ap-m-breadcrumbs-crumb" href="/documentation/components/">Components</a> </nav> <h1> amp-accordion <div class="ap--versions"> <select class="ap--versions-toggle" on="change:AMP.navigateTo(url=event.value)"> <option value="../amp-accordion-v1.0/?format=websites"> 1.0 </option> <option selected value="../amp-accordion/?format=websites"> 0.1 </option> </select> </div> </h1> <div class="ap-o-component-intro">   <div class="ap-m-tip"> <div class="ap-a-ico ap-m-tip-icon"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#speech-bubble"> </use></svg> </div> <div class="ap-m-tip-content"> You can now use this component outside valid AMP documents using the <a href="https://bentojs.dev/components/bento-accordion/">Bento version of this component</a>. Learn more in the <a href="https://bentojs.dev/get-started/">Bento guide</a>. </div> </div> <div class="ap-o-component-intro-row"> <h4 class="ap-o-component-intro-headline">Description</h4> <p class="ap-o-component-intro-text">A stacked list of headers that collapse or expand content sections with user interaction.</p> </div>   <div class="ap-o-component-intro-row ap-o-component-intro-row-inline"> <h4 class="ap-o-component-intro-headline">Required Scripts</h4> <div id="amp-script" class="ap-a-copy-script"> <pre><script async custom-element="amp-accordion" src="https://cdn.ampproject.org/v0/amp-accordion-0.1.js"></script></pre> <amp-iframe width="24" height="24" layout="fixed" sandbox="allow-scripts" src="https://amp.dev/shared/copy-script/#%3Cscript%20async%20custom-element%3D%22amp-accordion%22%20src%3D%22https%3A//cdn.ampproject.org/v0/amp-accordion-0.1.js%22%3E%3C/script%3E" class="i-amphtml-layout-fixed i-amphtml-layout-size-defined" style="width:24px;height:24px;" i-amphtml-layout="fixed"> <div placeholder></div> </amp-iframe> </div> </div> <div class="ap-o-component-intro-row ap-o-component-intro-row-inline"> <h4 class="ap-o-component-intro-headline">Supported Layouts</h4> <div> <a class='ap-a-pill ap-a-pill-flat ap-a-pill-small ap-a-pill-link' href='/documentation/guides-and-tutorials/learn/amp-html-layout/layouts_demonstrated#container'>container</a> </div> </div> <div class="ap-o-component-intro-row"> <div id="examples" class="ap-m-clip"> <h4 class="ap-o-component-intro-headline">Examples</h4> <div class="ap-o-component-intro-list"> <a class='ap-o-component-intro-list-item' href='/documentation/examples/components/amp-accordion/'>amp-accordion</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/interactivity-dynamic-content/dynamic_accordion/'>Dynamic Accordion</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/e-commerce/housing/'>Housing</a> </div> </div> </div> </div> <p>Provides a way for viewers to glance at the content outline and jump to any section. This is helpful for mobile devices where even a couple of sentences into a section requires scrolling.</p> <h2 id="usage">Usage</h2> <p>The <code>amp-accordion</code> component allows you to display collapsible and expandable content sections. This component provides a way for viewers to glance at the content outline and jump to any section. Effective use reduces scrolling needs on mobile devices.</p> <p> </p> <ul> <li>An <code>amp-accordion</code> accepts one or more <code><section></code> elements as its direct children.</li> <li>Each <code><section></code> must contain exactly two direct children.</li> <li>The first child in a <code><section></code> is the heading for that section of the <code>amp-accordion</code>. It must be a heading element such as <code><h1>-<h6></code> or <code><header></code>.</li> <li>The second child in a <code><section></code> is the expandable/collapsible content. It can be any tag allowed in <a href="https://github.com/ampproject/amphtml/blob/main/docs/spec/amp-html-format.md">AMP HTML</a>.</li> <li>A click or tap on a <code><section></code> heading expands or collapses the section.</li> <li>An <code>amp-accordion</code> with a defined <code>id</code> preserves the collapsed or expanded state of each section while the user remains on your domain.</li> </ul> <p> </p> <p> </p> <h2 id="example">Example</h2> <p>The example below contains an <code>amp-accordion</code> with three sections. The <code>expanded</code> attribute on the third section expands it on page load. Include the <code>disable-session-state</code> attribute to preserve the collapsed/expanded state.</p> <p> </p><div class="ap-code-preview top-frame"> <amp-state id="orientation1" class="i-amphtml-layout-container" i-amphtml-layout="container"> <script type="application/json">true</script> </amp-state> <amp-state id="dimension1" class="i-amphtml-layout-container" i-amphtml-layout="container"> <script type="application/json">{"width":533,"height":300}</script> </amp-state> <amp-state id="example1" class="i-amphtml-layout-container" i-amphtml-layout="container"> <script type="application/json">"https://preview.amp.dev/documentation/components/amp-accordion.example.1.html"</script> </amp-state> <div class="ap-code-preview-top-preview ap-code-preview-top-preview-1"> <div class="ap-code-preview-controls"> <button [hidden]="!orientation1" class="ap-code-preview-controls-button" on="tap: AMP.setState({ orientation1: true, dimension1: { width: dimension1.height, height: dimension1.width, } })" i-amphtml-binding> <div class="ap-a-ico ap-code-preview-controls-icon"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#orientation-toggle"/></svg> </div> </button> <button class="ap-code-preview-controls-button" on="tap:AMP.setState({'example1': 'https://preview.amp.dev/documentation/components/amp-accordion.example.1.html?' + random()})"> <div class="ap-a-ico ap-code-preview-controls-icon"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#reload"/></svg> </div> </button> </div> <amp-iframe id="iframeContainer1" class="ap-code-preview-iframe i-amphtml-layout-intrinsic i-amphtml-layout-size-defined" src="https://preview.amp.dev/documentation/components/amp-accordion.example.1.html" layout="intrinsic" width="533" [width]="dimension1.width" height="300" [height]="dimension1.height" [src]="example1" sandbox="allow-scripts allow-popups allow-same-origin" frameborder="0" i-amphtml-binding i-amphtml-layout="intrinsic"><i-amphtml-sizer slot="i-amphtml-svc" class="i-amphtml-sizer"><img alt aria-hidden="true" class="i-amphtml-intrinsic-sizer" role="presentation" src="data:image/svg+xml;base64,PHN2ZyBoZWlnaHQ9IjMwMCIgd2lkdGg9IjUzMyIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiB2ZXJzaW9uPSIxLjEiLz4="></i-amphtml-sizer> <div placeholder></div> </amp-iframe> </div> <div class="-ta"><pre><span></span><span class="p"><</span><span class="nt">amp-accordion</span> <span class="na">id</span><span class="o">=</span><span class="s">"my-accordion"</span> <span class="na">disable-session-states</span><span class="p">></span> <span class="p"><</span><span class="nt">section</span><span class="p">></span> <span class="p"><</span><span class="nt">h2</span><span class="p">></span>Section 1<span class="p"></</span><span class="nt">h2</span><span class="p">></span> <span class="p"><</span><span class="nt">p</span><span class="p">></span>Content in section 1.<span class="p"></</span><span class="nt">p</span><span class="p">></span> <span class="p"></</span><span class="nt">section</span><span class="p">></span> <span class="p"><</span><span class="nt">section</span><span class="p">></span> <span class="p"><</span><span class="nt">h2</span><span class="p">></span>Section 2<span class="p"></</span><span class="nt">h2</span><span class="p">></span> <span class="p"><</span><span class="nt">div</span><span class="p">></span>Content in section 2.<span class="p"></</span><span class="nt">div</span><span class="p">></span> <span class="p"></</span><span class="nt">section</span><span class="p">></span> <span class="p"><</span><span class="nt">section</span> <span class="na">expanded</span><span class="p">></span> <span class="p"><</span><span class="nt">h2</span><span class="p">></span>Section 3<span class="p"></</span><span class="nt">h2</span><span class="p">></span> <span class="p"><</span><span class="nt">amp-img</span> <span class="na">src</span><span class="o">=</span><span class="s">"/static/inline-examples/images/squirrel.jpg"</span> <span class="na">width</span><span class="o">=</span><span class="s">"320"</span> <span class="na">height</span><span class="o">=</span><span class="s">"256"</span><span class="p">></</span><span class="nt">amp-img</span><span class="p">></span> <span class="p"></</span><span class="nt">section</span><span class="p">></span> <span class="p"></</span><span class="nt">amp-accordion</span><span class="p">></span> </pre></div> </div> <a href="https://playground.amp.dev/?url=https%3A//preview.amp.dev/documentation/components/amp-accordion.example.1.html%3Fformat%3Dwebsites" class="-n ap--playground-link"> <div class="ap-a-ico -i"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#internal"/></svg> </div> <span class="-r">Open this snippet in playground</span> </a> <h2 id="attributes">Attributes</h2> <h3 id="animate">animate</h3> <p>Include the <code>animate</code> attribute in <code><amp-accordion></code> to add a "roll down" animation when the content is expanded and "roll up" animation when collapsed.</p><div class="ap-code-preview top-frame"> <amp-state id="orientation2" class="i-amphtml-layout-container" i-amphtml-layout="container"> <script type="application/json">true</script> </amp-state> <amp-state id="dimension2" class="i-amphtml-layout-container" i-amphtml-layout="container"> <script type="application/json">{"width":533,"height":300}</script> </amp-state> <amp-state id="example2" class="i-amphtml-layout-container" i-amphtml-layout="container"> <script type="application/json">"https://preview.amp.dev/documentation/components/amp-accordion.example.2.html"</script> </amp-state> <div class="ap-code-preview-top-preview ap-code-preview-top-preview-2"> <div class="ap-code-preview-controls"> <button [hidden]="!orientation2" class="ap-code-preview-controls-button" on="tap: AMP.setState({ orientation2: true, dimension2: { width: dimension2.height, height: dimension2.width, } })" i-amphtml-binding> <div class="ap-a-ico ap-code-preview-controls-icon"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#orientation-toggle"/></svg> </div> </button> <button class="ap-code-preview-controls-button" on="tap:AMP.setState({'example2': 'https://preview.amp.dev/documentation/components/amp-accordion.example.2.html?' + random()})"> <div class="ap-a-ico ap-code-preview-controls-icon"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#reload"/></svg> </div> </button> </div> <amp-iframe id="iframeContainer2" class="ap-code-preview-iframe i-amphtml-layout-intrinsic i-amphtml-layout-size-defined" src="https://preview.amp.dev/documentation/components/amp-accordion.example.2.html" layout="intrinsic" width="533" [width]="dimension2.width" height="300" [height]="dimension2.height" [src]="example2" sandbox="allow-scripts allow-popups allow-same-origin" frameborder="0" i-amphtml-binding i-amphtml-layout="intrinsic"><i-amphtml-sizer slot="i-amphtml-svc" class="i-amphtml-sizer"><img alt aria-hidden="true" class="i-amphtml-intrinsic-sizer" role="presentation" src="data:image/svg+xml;base64,PHN2ZyBoZWlnaHQ9IjMwMCIgd2lkdGg9IjUzMyIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiB2ZXJzaW9uPSIxLjEiLz4="></i-amphtml-sizer> <div placeholder></div> </amp-iframe> </div> <div class="-ta"><pre><span></span><span class="p"><</span><span class="nt">amp-accordion</span> <span class="na">animate</span><span class="p">></span> <span class="p"><</span><span class="nt">section</span><span class="p">></span> <span class="p"><</span><span class="nt">h2</span><span class="p">></span>Section 1<span class="p"></</span><span class="nt">h2</span><span class="p">></span> <span class="p"><</span><span class="nt">p</span><span class="p">></span>Content in section 1.<span class="p"></</span><span class="nt">p</span><span class="p">></span> <span class="p"></</span><span class="nt">section</span><span class="p">></span> <span class="p"><</span><span class="nt">section</span><span class="p">></span> <span class="p"><</span><span class="nt">h2</span><span class="p">></span>Section 2<span class="p"></</span><span class="nt">h2</span><span class="p">></span> <span class="p"><</span><span class="nt">div</span><span class="p">></span>Content in section 2.<span class="p"></</span><span class="nt">div</span><span class="p">></span> <span class="p"></</span><span class="nt">section</span><span class="p">></span> <span class="p"><</span><span class="nt">section</span><span class="p">></span> <span class="p"><</span><span class="nt">h2</span><span class="p">></span>Section 3<span class="p"></</span><span class="nt">h2</span><span class="p">></span> <span class="p"><</span><span class="nt">amp-img</span> <span class="na">src</span><span class="o">=</span><span class="s">"/static/inline-examples/images/squirrel.jpg"</span> <span class="na">width</span><span class="o">=</span><span class="s">"320"</span> <span class="na">height</span><span class="o">=</span><span class="s">"256"</span> <span class="p">></</span><span class="nt">amp-img</span><span class="p">></span> <span class="p"></</span><span class="nt">section</span><span class="p">></span> <span class="p"></</span><span class="nt">amp-accordion</span><span class="p">></span> </pre></div> </div> <a href="https://playground.amp.dev/?url=https%3A//preview.amp.dev/documentation/components/amp-accordion.example.2.html%3Fformat%3Dwebsites" class="-n ap--playground-link"> <div class="ap-a-ico -i"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#internal"/></svg> </div> <span class="-r">Open this snippet in playground</span> </a> <p> </p> <h3 id="disable-session-states">disable-session-states</h3> <p>Include the <code>disable-session-states</code> attribute on <code><amp-accordion></code> to disable collapsed/expanded state preservation.</p> <p> </p> <h3 id="expanded">expanded</h3> <p>Apply the <code>expanded</code> attribute to a nested <code><section></code> to expand that section when the page loads.</p> <h3 id="expand-single-section">expand-single-section</h3> <p>Apply the <code>expand-single-section</code> attribute to <code>amp-accordion</code> to specify that only one <code><section></code> can expand at a time. If the user clicks or taps on a collapsed <code><section></code>, any currently expanded <code><section></code> collapses.</p><div class="ap-code-preview top-frame"> <amp-state id="orientation3" class="i-amphtml-layout-container" i-amphtml-layout="container"> <script type="application/json">true</script> </amp-state> <amp-state id="dimension3" class="i-amphtml-layout-container" i-amphtml-layout="container"> <script type="application/json">{"width":533,"height":300}</script> </amp-state> <amp-state id="example3" class="i-amphtml-layout-container" i-amphtml-layout="container"> <script type="application/json">"https://preview.amp.dev/documentation/components/amp-accordion.example.3.html"</script> </amp-state> <div class="ap-code-preview-top-preview ap-code-preview-top-preview-3"> <div class="ap-code-preview-controls"> <button [hidden]="!orientation3" class="ap-code-preview-controls-button" on="tap: AMP.setState({ orientation3: true, dimension3: { width: dimension3.height, height: dimension3.width, } })" i-amphtml-binding> <div class="ap-a-ico ap-code-preview-controls-icon"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#orientation-toggle"/></svg> </div> </button> <button class="ap-code-preview-controls-button" on="tap:AMP.setState({'example3': 'https://preview.amp.dev/documentation/components/amp-accordion.example.3.html?' + random()})"> <div class="ap-a-ico ap-code-preview-controls-icon"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#reload"/></svg> </div> </button> </div> <amp-iframe id="iframeContainer3" class="ap-code-preview-iframe i-amphtml-layout-intrinsic i-amphtml-layout-size-defined" src="https://preview.amp.dev/documentation/components/amp-accordion.example.3.html" layout="intrinsic" width="533" [width]="dimension3.width" height="300" [height]="dimension3.height" [src]="example3" sandbox="allow-scripts allow-popups allow-same-origin" frameborder="0" i-amphtml-binding i-amphtml-layout="intrinsic"><i-amphtml-sizer slot="i-amphtml-svc" class="i-amphtml-sizer"><img alt aria-hidden="true" class="i-amphtml-intrinsic-sizer" role="presentation" src="data:image/svg+xml;base64,PHN2ZyBoZWlnaHQ9IjMwMCIgd2lkdGg9IjUzMyIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiB2ZXJzaW9uPSIxLjEiLz4="></i-amphtml-sizer> <div placeholder></div> </amp-iframe> </div> <div class="-ta"><pre><span></span><span class="p"><</span><span class="nt">amp-accordion</span> <span class="na">expand-single-section</span><span class="p">></span> <span class="p"><</span><span class="nt">section</span><span class="p">></span> <span class="p"><</span><span class="nt">h2</span><span class="p">></span>Section 1<span class="p"></</span><span class="nt">h2</span><span class="p">></span> <span class="p"><</span><span class="nt">p</span><span class="p">></span>Content in section 1.<span class="p"></</span><span class="nt">p</span><span class="p">></span> <span class="p"></</span><span class="nt">section</span><span class="p">></span> <span class="p"><</span><span class="nt">section</span><span class="p">></span> <span class="p"><</span><span class="nt">h2</span><span class="p">></span>Section 2<span class="p"></</span><span class="nt">h2</span><span class="p">></span> <span class="p"><</span><span class="nt">div</span><span class="p">></span>Content in section 2.<span class="p"></</span><span class="nt">div</span><span class="p">></span> <span class="p"></</span><span class="nt">section</span><span class="p">></span> <span class="p"><</span><span class="nt">section</span><span class="p">></span> <span class="p"><</span><span class="nt">h2</span><span class="p">></span>Section 3<span class="p"></</span><span class="nt">h2</span><span class="p">></span> <span class="p"><</span><span class="nt">amp-img</span> <span class="na">src</span><span class="o">=</span><span class="s">"/static/inline-examples/images/squirrel.jpg"</span> <span class="na">width</span><span class="o">=</span><span class="s">"320"</span> <span class="na">height</span><span class="o">=</span><span class="s">"256"</span> <span class="p">></</span><span class="nt">amp-img</span><span class="p">></span> <span class="p"></</span><span class="nt">section</span><span class="p">></span> <span class="p"></</span><span class="nt">amp-accordion</span><span class="p">></span> </pre></div> </div> <a href="https://playground.amp.dev/?url=https%3A//preview.amp.dev/documentation/components/amp-accordion.example.3.html%3Fformat%3Dwebsites" class="-n ap--playground-link"> <div class="ap-a-ico -i"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#internal"/></svg> </div> <span class="-r">Open this snippet in playground</span> </a> <h3 id="[data-expand]">[data-expand]</h3> <p>Bind the <code>[data-expand]</code> attribute to a <code><section></code> to expand or collapse that section. An expanded section collapses if the expression evaluates as false. A collapsed section expands if the expression evaluates as anything other than false.</p><div class="ap-code-preview top-frame"> <amp-state id="orientation4" class="i-amphtml-layout-container" i-amphtml-layout="container"> <script type="application/json">true</script> </amp-state> <amp-state id="dimension4" class="i-amphtml-layout-container" i-amphtml-layout="container"> <script type="application/json">{"width":533,"height":300}</script> </amp-state> <amp-state id="example4" class="i-amphtml-layout-container" i-amphtml-layout="container"> <script type="application/json">"https://preview.amp.dev/documentation/components/amp-accordion.example.4.html"</script> </amp-state> <div class="ap-code-preview-top-preview ap-code-preview-top-preview-4"> <div class="ap-code-preview-controls"> <button [hidden]="!orientation4" class="ap-code-preview-controls-button" on="tap: AMP.setState({ orientation4: true, dimension4: { width: dimension4.height, height: dimension4.width, } })" i-amphtml-binding> <div class="ap-a-ico ap-code-preview-controls-icon"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#orientation-toggle"/></svg> </div> </button> <button class="ap-code-preview-controls-button" on="tap:AMP.setState({'example4': 'https://preview.amp.dev/documentation/components/amp-accordion.example.4.html?' + random()})"> <div class="ap-a-ico ap-code-preview-controls-icon"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#reload"/></svg> </div> </button> </div> <amp-iframe id="iframeContainer4" class="ap-code-preview-iframe i-amphtml-layout-intrinsic i-amphtml-layout-size-defined" src="https://preview.amp.dev/documentation/components/amp-accordion.example.4.html" layout="intrinsic" width="533" [width]="dimension4.width" height="300" [height]="dimension4.height" [src]="example4" sandbox="allow-scripts allow-popups allow-same-origin" frameborder="0" i-amphtml-binding i-amphtml-layout="intrinsic"><i-amphtml-sizer slot="i-amphtml-svc" class="i-amphtml-sizer"><img alt aria-hidden="true" class="i-amphtml-intrinsic-sizer" role="presentation" src="data:image/svg+xml;base64,PHN2ZyBoZWlnaHQ9IjMwMCIgd2lkdGg9IjUzMyIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiB2ZXJzaW9uPSIxLjEiLz4="></i-amphtml-sizer> <div placeholder></div> </amp-iframe> </div> <div class="-ta"><pre><span></span><span class="p"><</span><span class="nt">amp-accordion</span><span class="p">></span> <span class="p"><</span><span class="nt">section</span> <span class="na">[data-expand]</span><span class="o">=</span><span class="s">"sectionOne"</span> <span class="na">on</span><span class="o">=</span><span class="s">"expand:AMP.setState({sectionOne: true});collapse:AMP.setState({sectionOne: false})"</span> <span class="p">></span> <span class="p"><</span><span class="nt">h2</span><span class="p">></span>Section 1<span class="p"></</span><span class="nt">h2</span><span class="p">></span> <span class="p"><</span><span class="nt">p</span><span class="p">></span>Bunch of awesome content<span class="p"></</span><span class="nt">p</span><span class="p">></span> <span class="p"></</span><span class="nt">section</span><span class="p">></span> <span class="p"><</span><span class="nt">section</span><span class="p">></span> <span class="p"><</span><span class="nt">h2</span><span class="p">></span>Section 2<span class="p"></</span><span class="nt">h2</span><span class="p">></span> <span class="p"><</span><span class="nt">div</span><span class="p">></span>Bunch of awesome content<span class="p"></</span><span class="nt">div</span><span class="p">></span> <span class="p"></</span><span class="nt">section</span><span class="p">></span> <span class="p"><</span><span class="nt">section</span><span class="p">></span> <span class="p"><</span><span class="nt">h2</span><span class="p">></span>Section 3<span class="p"></</span><span class="nt">h2</span><span class="p">></span> <span class="p"><</span><span class="nt">div</span><span class="p">></span>Bunch of awesome content<span class="p"></</span><span class="nt">div</span><span class="p">></span> <span class="p"></</span><span class="nt">section</span><span class="p">></span> <span class="p"></</span><span class="nt">amp-accordion</span><span class="p">></span> <span class="p"><</span><span class="nt">button</span> <span class="na">on</span><span class="o">=</span><span class="s">"tap:AMP.setState({sectionOne: true})"</span><span class="p">></span>Expand section 1<span class="p"></</span><span class="nt">button</span><span class="p">></span> <span class="p"><</span><span class="nt">button</span> <span class="na">on</span><span class="o">=</span><span class="s">"tap:AMP.setState({sectionOne: false})"</span><span class="p">></span>Collapse section 1<span class="p"></</span><span class="nt">button</span><span class="p">></span> </pre></div> </div> <a href="https://playground.amp.dev/?url=https%3A//preview.amp.dev/documentation/components/amp-accordion.example.4.html%3Fformat%3Dwebsites" class="-n ap--playground-link"> <div class="ap-a-ico -i"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#internal"/></svg> </div> <span class="-r">Open this snippet in playground</span> </a> <p> </p> <h2 id="actions">Actions</h2> <h3 id="toggle">toggle</h3> <p>The <code>toggle</code> action switches the <code>expanded</code> and <code>collapsed</code> states of <code>amp-accordion</code> sections. When called with no arguments, it toggles all sections of the accordion. To specify a specific section, add the <code>section</code> argument and use its corresponding <code>id</code> as the value.</p><div class="ap-code-preview top-frame"> <amp-state id="orientation5" class="i-amphtml-layout-container" i-amphtml-layout="container"> <script type="application/json">true</script> </amp-state> <amp-state id="dimension5" class="i-amphtml-layout-container" i-amphtml-layout="container"> <script type="application/json">{"width":533,"height":300}</script> </amp-state> <amp-state id="example5" class="i-amphtml-layout-container" i-amphtml-layout="container"> <script type="application/json">"https://preview.amp.dev/documentation/components/amp-accordion.example.5.html"</script> </amp-state> <div class="ap-code-preview-top-preview ap-code-preview-top-preview-5"> <div class="ap-code-preview-controls"> <button [hidden]="!orientation5" class="ap-code-preview-controls-button" on="tap: AMP.setState({ orientation5: true, dimension5: { width: dimension5.height, height: dimension5.width, } })" i-amphtml-binding> <div class="ap-a-ico ap-code-preview-controls-icon"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#orientation-toggle"/></svg> </div> </button> <button class="ap-code-preview-controls-button" on="tap:AMP.setState({'example5': 'https://preview.amp.dev/documentation/components/amp-accordion.example.5.html?' + random()})"> <div class="ap-a-ico ap-code-preview-controls-icon"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#reload"/></svg> </div> </button> </div> <amp-iframe id="iframeContainer5" class="ap-code-preview-iframe i-amphtml-layout-intrinsic i-amphtml-layout-size-defined" src="https://preview.amp.dev/documentation/components/amp-accordion.example.5.html" layout="intrinsic" width="533" [width]="dimension5.width" height="300" [height]="dimension5.height" [src]="example5" sandbox="allow-scripts allow-popups allow-same-origin" frameborder="0" i-amphtml-binding i-amphtml-layout="intrinsic"><i-amphtml-sizer slot="i-amphtml-svc" class="i-amphtml-sizer"><img alt aria-hidden="true" class="i-amphtml-intrinsic-sizer" role="presentation" src="data:image/svg+xml;base64,PHN2ZyBoZWlnaHQ9IjMwMCIgd2lkdGg9IjUzMyIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiB2ZXJzaW9uPSIxLjEiLz4="></i-amphtml-sizer> <div placeholder></div> </amp-iframe> </div> <div class="-ta"><pre><span></span><span class="p"><</span><span class="nt">amp-accordion</span> <span class="na">id</span><span class="o">=</span><span class="s">"myAccordion"</span><span class="p">></span> <span class="p"><</span><span class="nt">section</span> <span class="na">id</span><span class="o">=</span><span class="s">"section1"</span><span class="p">></span> <span class="p"><</span><span class="nt">h2</span><span class="p">></span>Section 1<span class="p"></</span><span class="nt">h2</span><span class="p">></span> <span class="p"><</span><span class="nt">p</span><span class="p">></span>Bunch of awesome content<span class="p"></</span><span class="nt">p</span><span class="p">></span> <span class="p"></</span><span class="nt">section</span><span class="p">></span> <span class="p"><</span><span class="nt">section</span><span class="p">></span> <span class="p"><</span><span class="nt">h2</span><span class="p">></span>Section 2<span class="p"></</span><span class="nt">h2</span><span class="p">></span> <span class="p"><</span><span class="nt">div</span><span class="p">></span>Bunch of awesome content<span class="p"></</span><span class="nt">div</span><span class="p">></span> <span class="p"></</span><span class="nt">section</span><span class="p">></span> <span class="p"><</span><span class="nt">section</span><span class="p">></span> <span class="p"><</span><span class="nt">h2</span><span class="p">></span>Section 3<span class="p"></</span><span class="nt">h2</span><span class="p">></span> <span class="p"><</span><span class="nt">div</span><span class="p">></span>Bunch of awesome content<span class="p"></</span><span class="nt">div</span><span class="p">></span> <span class="p"></</span><span class="nt">section</span><span class="p">></span> <span class="p"></</span><span class="nt">amp-accordion</span><span class="p">></span> <span class="p"><</span><span class="nt">button</span> <span class="na">on</span><span class="o">=</span><span class="s">"tap:myAccordion.toggle"</span><span class="p">></span>Toggle All Sections<span class="p"></</span><span class="nt">button</span><span class="p">></span> <span class="p"><</span><span class="nt">button</span> <span class="na">on</span><span class="o">=</span><span class="s">"tap:myAccordion.toggle(section='section1')"</span><span class="p">></span> Toggle Section 1 <span class="p"></</span><span class="nt">button</span><span class="p">></span> </pre></div> </div> <a href="https://playground.amp.dev/?url=https%3A//preview.amp.dev/documentation/components/amp-accordion.example.5.html%3Fformat%3Dwebsites" class="-n ap--playground-link"> <div class="ap-a-ico -i"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#internal"/></svg> </div> <span class="-r">Open this snippet in playground</span> </a> <h3 id="expand">expand</h3> <p>The <code>expand</code> action expands the sections of the <code>amp-accordion</code>. If a section is already expanded, it stays expanded. When called with no arguments, it expands all sections of the accordion. To specify a section, add the <code>section</code> argument, and use its corresponding <code>id</code> as the value.</p> <div class="-ta"><pre><span></span><span class="p"><</span><span class="nt">button</span> <span class="na">on</span><span class="o">=</span><span class="s">"tap:myAccordion.expand"</span><span class="p">></span>Expand All Sections<span class="p"></</span><span class="nt">button</span><span class="p">></span> <span class="p"><</span><span class="nt">button</span> <span class="na">on</span><span class="o">=</span><span class="s">"tap:myAccordion.expand(section='section1')"</span><span class="p">></span> Expand Section 1 <span class="p"></</span><span class="nt">button</span><span class="p">></span> </pre></div> <h3 id="collapse">collapse</h3> <p>The <code>collapse</code> action collapses the sections of the <code>amp-accordion</code>. If a section is already collapsed, it stays collapsed. When called with no arguments, it collapses all sections of the accordion. To specify a section, add the <code>section</code> argument, and use its corresponding <code>id</code> as the value.</p> <div class="-ta"><pre><span></span><span class="p"><</span><span class="nt">button</span> <span class="na">on</span><span class="o">=</span><span class="s">"tap:myAccordion.collapse"</span><span class="p">></span>Collapse All Sections<span class="p"></</span><span class="nt">button</span><span class="p">></span> <span class="p"><</span><span class="nt">button</span> <span class="na">on</span><span class="o">=</span><span class="s">"tap:myAccordion.collapse(section='section1')"</span><span class="p">></span> Collapse Section 1 <span class="p"></</span><span class="nt">button</span><span class="p">></span> </pre></div> <p> </p> <h2 id="events">Events</h2> <p>The following <code>amp-accordion</code> events trigger on accordion sections when they're clicked or tapped.</p> <h3 id="expand_1">expand</h3> <p>The <code>expand</code> event triggers the targeted <code>amp-accordion</code> section to change from the collapsed state to the expanded state. Call <code>expand</code> on an already expanded section to trigger the <code>expand</code> event.</p><div class="ap-code-preview top-frame"> <amp-state id="orientation6" class="i-amphtml-layout-container" i-amphtml-layout="container"> <script type="application/json">true</script> </amp-state> <amp-state id="dimension6" class="i-amphtml-layout-container" i-amphtml-layout="container"> <script type="application/json">{"width":533,"height":300}</script> </amp-state> <amp-state id="example6" class="i-amphtml-layout-container" i-amphtml-layout="container"> <script type="application/json">"https://preview.amp.dev/documentation/components/amp-accordion.example.6.html"</script> </amp-state> <div class="ap-code-preview-top-preview ap-code-preview-top-preview-6"> <div class="ap-code-preview-controls"> <button [hidden]="!orientation6" class="ap-code-preview-controls-button" on="tap: AMP.setState({ orientation6: true, dimension6: { width: dimension6.height, height: dimension6.width, } })" i-amphtml-binding> <div class="ap-a-ico ap-code-preview-controls-icon"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#orientation-toggle"/></svg> </div> </button> <button class="ap-code-preview-controls-button" on="tap:AMP.setState({'example6': 'https://preview.amp.dev/documentation/components/amp-accordion.example.6.html?' + random()})"> <div class="ap-a-ico ap-code-preview-controls-icon"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#reload"/></svg> </div> </button> </div> <amp-iframe id="iframeContainer6" class="ap-code-preview-iframe i-amphtml-layout-intrinsic i-amphtml-layout-size-defined" src="https://preview.amp.dev/documentation/components/amp-accordion.example.6.html" layout="intrinsic" width="533" [width]="dimension6.width" height="300" [height]="dimension6.height" [src]="example6" sandbox="allow-scripts allow-popups allow-same-origin" frameborder="0" i-amphtml-binding i-amphtml-layout="intrinsic"><i-amphtml-sizer slot="i-amphtml-svc" class="i-amphtml-sizer"><img alt aria-hidden="true" class="i-amphtml-intrinsic-sizer" role="presentation" src="data:image/svg+xml;base64,PHN2ZyBoZWlnaHQ9IjMwMCIgd2lkdGg9IjUzMyIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiB2ZXJzaW9uPSIxLjEiLz4="></i-amphtml-sizer> <div placeholder></div> </amp-iframe> </div> <div class="-ta"><pre><span></span><span class="p"><</span><span class="nt">amp-accordion</span> <span class="na">id</span><span class="o">=</span><span class="s">"myAccordion"</span><span class="p">></span> <span class="p"><</span><span class="nt">section</span> <span class="na">id</span><span class="o">=</span><span class="s">"section1"</span> <span class="na">on</span><span class="o">=</span><span class="s">"expand:myAccordion.expand(section='section2')"</span><span class="p">></span> <span class="p"><</span><span class="nt">h2</span><span class="p">></span>Section 1<span class="p"></</span><span class="nt">h2</span><span class="p">></span> <span class="p"><</span><span class="nt">p</span><span class="p">></span>Opening me will open Section 2<span class="p"></</span><span class="nt">p</span><span class="p">></span> <span class="p"></</span><span class="nt">section</span><span class="p">></span> <span class="p"><</span><span class="nt">section</span><span class="p">></span> <span class="p"><</span><span class="nt">h2</span><span class="p">></span>Section 3<span class="p"></</span><span class="nt">h2</span><span class="p">></span> <span class="p"><</span><span class="nt">div</span><span class="p">></span>Bunch of awesome content<span class="p"></</span><span class="nt">div</span><span class="p">></span> <span class="p"></</span><span class="nt">section</span><span class="p">></span> <span class="p"></</span><span class="nt">amp-accordion</span><span class="p">></span> </pre></div> </div> <a href="https://playground.amp.dev/?url=https%3A//preview.amp.dev/documentation/components/amp-accordion.example.6.html%3Fformat%3Dwebsites" class="-n ap--playground-link"> <div class="ap-a-ico -i"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#internal"/></svg> </div> <span class="-r">Open this snippet in playground</span> </a> <h3 id="collapse_1">collapse</h3> <p>The <code>collapse</code> event triggers the targeted <code>amp-accordion</code> section to change from the expanded state to the collapsed state. Call <code>collapse</code> on an already collapsed section to trigger the event.</p><div class="ap-code-preview top-frame"> <amp-state id="orientation7" class="i-amphtml-layout-container" i-amphtml-layout="container"> <script type="application/json">true</script> </amp-state> <amp-state id="dimension7" class="i-amphtml-layout-container" i-amphtml-layout="container"> <script type="application/json">{"width":533,"height":300}</script> </amp-state> <amp-state id="example7" class="i-amphtml-layout-container" i-amphtml-layout="container"> <script type="application/json">"https://preview.amp.dev/documentation/components/amp-accordion.example.7.html"</script> </amp-state> <div class="ap-code-preview-top-preview ap-code-preview-top-preview-7"> <div class="ap-code-preview-controls"> <button [hidden]="!orientation7" class="ap-code-preview-controls-button" on="tap: AMP.setState({ orientation7: true, dimension7: { width: dimension7.height, height: dimension7.width, } })" i-amphtml-binding> <div class="ap-a-ico ap-code-preview-controls-icon"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#orientation-toggle"/></svg> </div> </button> <button class="ap-code-preview-controls-button" on="tap:AMP.setState({'example7': 'https://preview.amp.dev/documentation/components/amp-accordion.example.7.html?' + random()})"> <div class="ap-a-ico ap-code-preview-controls-icon"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#reload"/></svg> </div> </button> </div> <amp-iframe id="iframeContainer7" class="ap-code-preview-iframe i-amphtml-layout-intrinsic i-amphtml-layout-size-defined" src="https://preview.amp.dev/documentation/components/amp-accordion.example.7.html" layout="intrinsic" width="533" [width]="dimension7.width" height="300" [height]="dimension7.height" [src]="example7" sandbox="allow-scripts allow-popups allow-same-origin" frameborder="0" i-amphtml-binding i-amphtml-layout="intrinsic"><i-amphtml-sizer slot="i-amphtml-svc" class="i-amphtml-sizer"><img alt aria-hidden="true" class="i-amphtml-intrinsic-sizer" role="presentation" src="data:image/svg+xml;base64,PHN2ZyBoZWlnaHQ9IjMwMCIgd2lkdGg9IjUzMyIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiB2ZXJzaW9uPSIxLjEiLz4="></i-amphtml-sizer> <div placeholder></div> </amp-iframe> </div> <div class="-ta"><pre><span></span><span class="p"><</span><span class="nt">amp-accordion</span> <span class="na">id</span><span class="o">=</span><span class="s">"myAccordion"</span><span class="p">></span> <span class="p"><</span><span class="nt">section</span> <span class="na">id</span><span class="o">=</span><span class="s">"section2"</span> <span class="na">on</span><span class="o">=</span><span class="s">"collapse:myAccordion.collapse(section='section1')"</span><span class="p">></span> <span class="p"><</span><span class="nt">h2</span><span class="p">></span>Section 2<span class="p"></</span><span class="nt">h2</span><span class="p">></span> <span class="p"><</span><span class="nt">div</span><span class="p">></span>Closing me will close Section 1<span class="p"></</span><span class="nt">div</span><span class="p">></span> <span class="p"></</span><span class="nt">section</span><span class="p">></span> <span class="p"><</span><span class="nt">section</span><span class="p">></span> <span class="p"><</span><span class="nt">h2</span><span class="p">></span>Section 3<span class="p"></</span><span class="nt">h2</span><span class="p">></span> <span class="p"><</span><span class="nt">div</span><span class="p">></span>Bunch of awesome content<span class="p"></</span><span class="nt">div</span><span class="p">></span> <span class="p"></</span><span class="nt">section</span><span class="p">></span> <span class="p"></</span><span class="nt">amp-accordion</span><span class="p">></span> </pre></div> </div> <a href="https://playground.amp.dev/?url=https%3A//preview.amp.dev/documentation/components/amp-accordion.example.7.html%3Fformat%3Dwebsites" class="-n ap--playground-link"> <div class="ap-a-ico -i"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#internal"/></svg> </div> <span class="-r">Open this snippet in playground</span> </a> <h2 id="styling">Styling</h2> <p>The <code>amp-accordion</code> element selector styles an <code>amp-accordion</code> according to your specifications. The following example changes the background color to green:</p> <div class="-ta"><pre><span></span><span class="nt">amp-accordion</span> <span class="p">{</span> <span class="k">background-color</span><span class="p">:</span> <span class="kc">green</span><span class="p">;</span> <span class="p">}</span> </pre></div> <p>Keep the following points in mind when you style an amp-accordion:</p> <ul> <li><code>amp-accordion</code> elements are always <code>display: block</code>.</li> <li><code>float</code> cannot style a <code><section></code>, heading, nor content elements.</li> <li>An expanded section applies the <code>expanded</code> attribute to the <code><section></code> element.</li> <li>The content element is clear-fixed with <code>overflow: hidden</code> and hence cannot have scrollbars.</li> <li>Margins of the <code><amp-accordion></code>, <code><section></code>, heading, and content elements are set to <code>0</code>, but can be overridden in custom styles.</li> <li>Both the header and content elements are <code>position: relative</code>.</li> </ul> <h2 id="accessibility">Accessibility</h2> <p><code>amp-accordion</code> automatically adds the following <a href="https://developer.mozilla.org/en-US/docs/Web/Accessibility/ARIA">ARIA attributes</a>:</p> <ul> <li><code>aria-controls</code>: Applied to the header element of each <code>amp-accordion</code> section.</li> <li><code>aria-expanded (state)</code>: Applied to the header element of each <code>amp-accordion</code> section.</li> <li><code>aria-labelledby</code>: Applied to the content element of each <code>amp-accordion</code> section.</li> </ul> <p><code>amp-accordion</code> also automatically adds the following accessibility attributes:</p> <ul> <li><code>tabindex</code>: Applied to the header element of each <code>amp-accordion</code> section.</li> <li><code>role=button</code>: Applied to the header element of each <code>amp-accordion</code> section.</li> <li><code>role=region</code>: Applied to the content element of each <code>amp-accordion</code> section.</li> </ul> <h2 id="validation">Validation</h2> <p>See <a href="https://github.com/ampproject/amphtml/blob/main/extensions/amp-accordion/validator-amp-accordion.protoascii">amp-accordion rules</a> in the AMP validator specification.</p> </section> <section class="ap--help"> <div class="-ff"> <span class="-fl">Need more help?</span> <p class="-fh">You've read this document a dozen times but it doesn't really cover all of your questions? Maybe other people felt the same: reach out to them on Stack Overflow.</p> <a href="https://stackoverflow.com/questions/tagged/amp-html" rel="noopener" class="-n"> <svg class="ap-a-ico -i"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#external"/></svg> <span class="-r">Go to Stack Overflow</span> </a> <div class="-fp"></div> <span class="-fl">Found a bug or missing a feature?</span> <p class="-fh">The AMP project strongly encourages your participation and contributions! We hope you'll become an ongoing participant in our open source community but we also welcome one-off contributions for the issues you're particularly passionate about.</p> <a href="https://github.com/ampproject/amphtml" rel="noopener" class="-n link-preview-1"> <svg class="ap-a-ico -i"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#external"/></svg> <span class="-r">Go to GitHub</span> </a> <div class="-fp"></div> </div> </section> </div> </main> <amp-sidebar id="sidebar-left" class="ap--ampsidebar i-amphtml-layout-nodisplay" layout="nodisplay" side="left" hidden="hidden" i-amphtml-layout="nodisplay"> <nav class="ap--ampsidebar-toolbar" toolbar="(min-width: 768px)" toolbar-target="ap--sidebar-content"> <ul> <div class="ap-m-format-toggle"> <button class="ap-m-format-toggle-selected ap-m-format-toggle-link-websites"> <span class="ap-a-ico"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#amp-websites"/></svg> </span> <span>websites</span> <span 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