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Documentation: <amp-mustache> - amp.dev

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xmlns="http://www.w3.org/2000/svg" viewBox="0 0 30 30"><g fill="none" fill-rule="evenodd"><path fill="#FFF" d="M0 15c0 8.284 6.716 15 15 15 8.285 0 15-6.716 15-15 0-8.284-6.715-15-15-15C6.716 0 0 6.716 0 15z"/><path fill="#005AF0" fill-rule="nonzero" d="M13.85 24.098h-1.14l1.128-6.823-3.49.005h-.05a.57.57 0 0 1-.568-.569c0-.135.125-.363.125-.363l6.272-10.46 1.16.005-1.156 6.834 3.508-.004h.056c.314 0 .569.254.569.568 0 .128-.05.24-.121.335L13.85 24.098zM15 0C6.716 0 0 6.716 0 15c0 8.284 6.716 15 15 15 8.285 0 15-6.716 15-15 0-8.284-6.715-15-15-15z"/></g></symbol> </defs> </svg> <header class="ap--header " [class]="'ap--header ' + (mainmenuopen ? 'mainmenuopen' : '')" i-amphtml-binding> <div class="ap-o-header"> <a class="ap-o-header-home" href="/"> <svg class="ap-o-header-home-logo"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#logo"/></svg> <span class="ap-o-header-home-title">AMP</span> </a> <nav class="ap-o-header-main"> <div class="ap-o-header-main-item"> <button class="ap-o-header-main-link -tw "> About <div class="ap-a-ico ap-o-header-main-link-icon"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-solid"/></svg> </div> </button> <ul class="ap-o-header-flyout"> <li class="ap-o-header-flyout-primary-item"> <a class="ap-o-header-flyout-primary-item-link websites" href="/about/websites/"> <div class="ap-o-header-flyout-primary-item-link-icon websites"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#amp-websites"/></svg> </div> <div class="ap-o-header-flyout-primary-item-link-info ap-o-header-flyout-primary-item-link-info-websites"> <div class="ap-o-header-flyout-item-title">AMP Websites</div> <div class="ap-o-header-flyout-item-description">Create flawless web experiences</div> </div> </a> </li> <li class="ap-o-header-flyout-primary-item"> <a class="ap-o-header-flyout-primary-item-link stories" href="/about/stories/"> <div class="ap-o-header-flyout-primary-item-link-icon stories"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#amp-stories"/></svg> </div> <div class="ap-o-header-flyout-primary-item-link-info ap-o-header-flyout-primary-item-link-info-stories"> <div class="ap-o-header-flyout-item-title">Web Stories</div> <div class="ap-o-header-flyout-item-description">Snackable Stories for everyone</div> </div> </a> </li> <li class="ap-o-header-flyout-primary-item"> <a class="ap-o-header-flyout-primary-item-link ads" href="/about/ads/"> <div class="ap-o-header-flyout-primary-item-link-icon ads"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#amp-ads"/></svg> </div> <div class="ap-o-header-flyout-primary-item-link-info ap-o-header-flyout-primary-item-link-info-ads"> <div class="ap-o-header-flyout-item-title">AMP Ads</div> <div class="ap-o-header-flyout-item-description">Super fast ads on the web</div> </div> </a> </li> <li class="ap-o-header-flyout-primary-item"> <a class="ap-o-header-flyout-primary-item-link email" href="/about/email/"> <div class="ap-o-header-flyout-primary-item-link-icon email"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#amp-email"/></svg> </div> <div class="ap-o-header-flyout-primary-item-link-info ap-o-header-flyout-primary-item-link-info-email"> <div class="ap-o-header-flyout-item-title">AMP Email</div> <div class="ap-o-header-flyout-item-description">Next gen email</div> </div> </a> </li> <li class="ap-o-header-flyout-item-secondary"> <a class="ap-o-header-flyout-item-title secondary" href="/about/how-amp-works/">How AMP works</a> </li> <li class="ap-o-header-flyout-item-secondary"> <a class="ap-o-header-flyout-item-title secondary" href="/about/mission-and-vision/">Vision &amp; Mission</a> </li> <li class="ap-o-header-flyout-item-secondary"> <a class="ap-o-header-flyout-item-title secondary" href="/about/use-cases/">Use cases</a> </li> <li class="ap-o-header-flyout-item-secondary"> <a class="ap-o-header-flyout-item-title secondary" href="/success-stories/">Success Stories</a> </li> </ul> </div> <div class="ap-o-header-main-item"> <button class="ap-o-header-main-link -tw active"> Documentation <div class="ap-a-ico ap-o-header-main-link-icon"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-solid"/></svg> </div> </button> <ul class="ap-o-header-flyout"> <li class="ap-o-header-flyout-item-secondary"> <a class="ap-o-header-flyout-item-title secondary" href="/documentation/">Get Started</a> </li> <li class="ap-o-header-flyout-primary-item"> <a class="ap-o-header-flyout-primary-item-link " href="/documentation/guides-and-tutorials/"> <div class="ap-o-header-flyout-primary-item-link-icon "> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#guides-documents"/></svg> </div> <div class="ap-o-header-flyout-primary-item-link-info"> <div class="ap-o-header-flyout-item-title">Guides &amp; Tutorials</div> <div class="ap-o-header-flyout-item-description">Get started with AMP</div> </div> </a> </li> <li class="ap-o-header-flyout-primary-item"> <a class="ap-o-header-flyout-primary-item-link " href="/documentation/components/"> <div class="ap-o-header-flyout-primary-item-link-icon "> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#components-flyout"/></svg> </div> <div class="ap-o-header-flyout-primary-item-link-info"> <div class="ap-o-header-flyout-item-title">Components</div> <div class="ap-o-header-flyout-item-description">The complete AMP library</div> </div> </a> </li> <li class="ap-o-header-flyout-primary-item"> <a class="ap-o-header-flyout-primary-item-link " href="/documentation/examples/"> <div class="ap-o-header-flyout-primary-item-link-icon "> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#examples-flyout"/></svg> </div> <div class="ap-o-header-flyout-primary-item-link-info"> <div class="ap-o-header-flyout-item-title">Examples</div> <div class="ap-o-header-flyout-item-description">Hands-on introduction to AMP</div> </div> </a> </li> <li class="ap-o-header-flyout-primary-item"> <a class="ap-o-header-flyout-primary-item-link " href="/documentation/courses/"> <div class="ap-o-header-flyout-primary-item-link-icon "> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#learn"/></svg> </div> <div class="ap-o-header-flyout-primary-item-link-info"> <div class="ap-o-header-flyout-item-title">Courses</div> <div class="ap-o-header-flyout-item-description">Learn AMP with free courses</div> </div> </a> </li> <li class="ap-o-header-flyout-primary-item"> <a class="ap-o-header-flyout-primary-item-link " href="/documentation/templates/"> <div class="ap-o-header-flyout-primary-item-link-icon "> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#template"/></svg> </div> <div class="ap-o-header-flyout-primary-item-link-info"> <div class="ap-o-header-flyout-item-title">Templates</div> <div class="ap-o-header-flyout-item-description">Ready to use</div> </div> </a> </li> <li class="ap-o-header-flyout-primary-item"> <a class="ap-o-header-flyout-primary-item-link " href="/documentation/tools/"> <div class="ap-o-header-flyout-primary-item-link-icon "> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#wrench"/></svg> </div> <div class="ap-o-header-flyout-primary-item-link-info"> <div class="ap-o-header-flyout-item-title">Tools</div> <div class="ap-o-header-flyout-item-description">Begin building</div> </div> </a> </li> </ul> </div> <div class="ap-o-header-main-item"> <button class="ap-o-header-main-link -tw "> Community <div class="ap-a-ico ap-o-header-main-link-icon"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-solid"/></svg> </div> </button> <ul class="ap-o-header-flyout"> <li class="ap-o-header-flyout-item-secondary"> <a class="ap-o-header-flyout-item-title secondary" href="/documentation/guides-and-tutorials/contribute/">Contribute</a> </li> <li class="ap-o-header-flyout-item-secondary"> <a class="ap-o-header-flyout-item-title secondary" href="/community/roadmap/">Roadmap</a> </li> <li class="ap-o-header-flyout-item-secondary"> <a class="ap-o-header-flyout-item-title secondary" href="/community/governance/">Governance</a> </li> <li class="ap-o-header-flyout-item-secondary"> <a class="ap-o-header-flyout-item-title secondary" href="/community/working-groups/access-subscriptions/">Working Groups</a> </li> </ul> </div> <div class="ap-o-header-main-item"> <button class="ap-o-header-main-link -tw "> Events <div class="ap-a-ico ap-o-header-main-link-icon"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-solid"/></svg> </div> </button> <ul class="ap-o-header-flyout"> <li class="ap-o-header-flyout-item-secondary"> <a class="ap-o-header-flyout-item-title secondary" href="/events/amp-fest-2020/">AMP Fest 2020</a> </li> <li class="ap-o-header-flyout-item-secondary"> <a class="ap-o-header-flyout-item-title secondary" href="/events/amp-roadshow/">AMP Roadshow</a> </li> </ul> </div> <div class="ap-o-header-main-item"> <a class="ap-o-header-main-link -tw" href="https://blog.amp.dev">Blog</a> </div> <div class="ap-o-header-main-item"> <button class="ap-o-header-main-link -tw "> Support <div class="ap-a-ico ap-o-header-main-link-icon"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-solid"/></svg> </div> </button> <ul class="ap-o-header-flyout"> <li class="ap-o-header-flyout-item-secondary"> <a class="ap-o-header-flyout-item-title secondary" href="/support/">Help</a> </li> <li class="ap-o-header-flyout-item-secondary"> <a class="ap-o-header-flyout-item-title secondary" href="/support/faq/">FAQ</a> </li> </ul> </div> </nav> <div class="-tv"> <span class="-tm" aria-label="Select a language" tabindex="-1"> <span class="-tw">EN</span> <div class="ap-a-ico -ty"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-solid"/></svg> </div> </span> <input class="-tg" type="checkbox" name="language-selector"> <div class="-tb" role="list"> <a class="-tw" href="/de/documentation/components/amp-mustache/" role="listitem">Deutsch</a> <a class="-tw" href="/fr/documentation/components/amp-mustache/" role="listitem">Français</a> <a class="-tw" href="/ar/documentation/components/amp-mustache/" role="listitem">العربية</a> <a class="-tw" href="/es/documentation/components/amp-mustache/" role="listitem">Español</a> <a class="-tw" href="/it/documentation/components/amp-mustache/" role="listitem">Italiano</a> <a class="-tw" href="/id/documentation/components/amp-mustache/" role="listitem">Indonesia</a> <a class="-tw" href="/ja/documentation/components/amp-mustache/" role="listitem">日本語</a> <a class="-tw" href="/ko/documentation/components/amp-mustache/" role="listitem">한국어</a> <a class="-tw" href="/pt_br/documentation/components/amp-mustache/" role="listitem">Português</a> <a class="-tw" href="/ru/documentation/components/amp-mustache/" role="listitem">Русский</a> <a class="-tw" href="/tr/documentation/components/amp-mustache/" role="listitem">Türkçe</a> <a class="-tw" href="/zh_cn/documentation/components/amp-mustache/" role="listitem">中文</a> <a class="-tw" href="/pl/documentation/components/amp-mustache/" role="listitem">Polski</a> <a class="-tw" href="/vi/documentation/components/amp-mustache/" 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 &amp; 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 &amp; 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="#version-notes">Version notes</a></li> <li><a href="#syntax">Syntax</a></li> <li><a href="#usage">Usage</a></li> <li><a href="#restrictions">Restrictions</a><ul> <li><a href="#validation">Validation</a></li> <li><a href="#sanitization">Sanitization</a></li> </ul> </li> <li><a href="#pitfalls">Pitfalls</a><ul> <li><a href="#nested-templates">Nested templates</a></li> <li><a href="#tables">Tables</a></li> <li><a href="#quote-escaping">Quote escaping</a></li> <li><a href="#html-entities">HTML entities</a></li> </ul> </li> <li><a href="#validation_1">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-mustache <div class="ap--versions"> <select class="ap--versions-toggle" on="change:AMP.navigateTo(url=event.value)"> <option selected value="../amp-mustache/?format=websites"> 0.2 </option> <option value="../amp-mustache-v0.1/?format=websites"> 0.1 </option> </select> </div> </h1> <div class="ap-o-component-intro"> <div class="ap-o-component-intro-row"> <h4 class="ap-o-component-intro-headline">Description</h4> <p class="ap-o-component-intro-text">Allows rendering of Mustache templates.</p> </div> &nbsp; <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>&lt;script async custom-template="amp-mustache" src="https://cdn.ampproject.org/v0/amp-mustache-0.2.js"&gt;&lt;/script&gt;</pre> <amp-iframe width="24" height="24" layout="fixed" sandbox="allow-scripts" src="https://amp.dev/shared/copy-script/#%3Cscript%20async%20custom-template%3D%22amp-mustache%22%20src%3D%22https%3A//cdn.ampproject.org/v0/amp-mustache-0.2.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"> <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/e-commerce/amp_for_e-commerce_getting_started/'>AMP for E-Commerce Getting Started</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/e-commerce/product_browse_page/'>Product Browse Page</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/e-commerce/product_page/'>Product Page</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/components/amp-access/'>amp-access</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/components/amp-autocomplete/'>amp-autocomplete</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/components/amp-bind/'>amp-bind</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/components/amp-date-countdown/'>amp-date-countdown</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/components/amp-date-display/'>amp-date-display</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/components/amp-date-picker/'>amp-date-picker</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/components/amp-form/'>amp-form</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/components/amp-inputmask/'>amp-inputmask</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/components/amp-list/'>amp-list</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/components/amp-mustache/'>amp-mustache</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/components/amp-render/'>amp-render</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/interactivity-dynamic-content/client-side_filtering/'>Client-side filtering</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/interactivity-dynamic-content/linked_dropdowns/'>Linked Dropdowns</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/interactivity-dynamic-content/mixing_dynamic_and_cached_data/'>Mixing Dynamic and Cached Data</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/interactivity-dynamic-content/restrict_duplicate_selection/'>Restrict Duplicate Selection</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/interactivity-dynamic-content/show_more_button/'>Show More Button</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/multimedia-animations/custom_loading_indicators/'>Custom Loading Indicators</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/news-publishing/news_article/'>News Article</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/news-publishing/recipe/'>Recipe</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/personalization/geolocation_with_amp-list/'>Geolocation with amp-list</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/user-consent/advanced_user_consent_flow/'>Advanced User Consent Flow</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/user-consent/client_side_user_consent_flow/'>Client Side User Consent Flow</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/e-commerce/checkout_flow/'>Checkout Flow</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/e-commerce/hotel/'>Hotel</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/e-commerce/housing/'>Housing</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/e-commerce/shopping_cart/'>Shopping Cart</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/components/amp-recaptcha-input/'>amp-recaptcha-input</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/interactivity-dynamic-content/comment_section/'>Comment Section</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/interactivity-dynamic-content/favorite_button/'>Favorite Button</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/interactivity-dynamic-content/paged_list/'>Paged List</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/interactivity-dynamic-content/poll/'>Poll</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/interactivity-dynamic-content/seatmap/'>SeatMap</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/interactivity-dynamic-content/seatmap_multiple_selection/'>SeatMap Multiple Selection</a> <a class='ap-o-component-intro-list-item' href='/documentation/examples/interactivity-dynamic-content/star_rating/'>Star Rating</a> </div> <button id="examples-expand" class="ap-m-clip-expand" on="tap:examples.toggleClass(class='expanded', force=true),examples-expand.hide()"> <svg class="ap-m-clip-expand-icon"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-solid"/></svg> </button> </div> </div> </div> <h2 id="version-notes">Version notes</h2> <table> <thead> <tr> <th>Version</th> <th>Description</th> </tr> </thead> <tbody> <tr> <td>0.2</td> <td>Support for SVG elements and reduced bundle size (12.2KB vs. 20.5KB, gzipped).<br><br>Migrates to a more modern HTML sanitizer library (Caja to DOMPurify). This may cause minor breaking changes due to differences in the tag and attribute allowlisting. We recommend testing your pages first before pushing to production to make sure the changes in generated markup do not affect functionality.</td> </tr> <tr> <td>0.1</td> <td>Initial implementation.</td> </tr> </tbody> </table> <h2 id="syntax">Syntax</h2> <p>Mustache is a logic-less template syntax. See <a href="http://mustache.github.io/mustache.5.html">Mustache specification</a> for more details. Some of the core Mustache tags are:</p> <ul> <li><code>{{variable}}</code>: A variable tag. It outputs the HTML-escaped value of a variable.</li> <li><code>{{#section}} {{/section}}</code>: A section tag. It can test the existence of a variable and iterate over it if it's an array.</li> <li><code>{{^section}} {{/section}}</code>: An inverted tag. It can test the non-existence of a variable.</li> <li><code>{{{unescaped}}}</code>: Unescaped HTML. It's restricted in the markup it may output (see "Restrictions" below).</li> </ul> <h2 id="usage">Usage</h2> <p>The <code>amp-mustache</code> template has to be defined and used according to the <a href="https://github.com/ampproject/amphtml/blob/main/extensions/amp-mustache/../../docs/spec/amp-html-templates.md">AMP Template Spec</a>.</p> <p>First, the <code>amp-mustache</code> has to be declared/loaded like this:</p> <div class="-ta"><pre><span></span><span class="p">&lt;</span><span class="nt">script</span> <span class="na">async</span> <span class="na">custom-template</span><span class="o">=</span><span class="s">"amp-mustache"</span> <span class="na">src</span><span class="o">=</span><span class="s">"https://cdn.ampproject.org/v0/amp-mustache-0.2.js"</span> <span class="p">&gt;&lt;/</span><span class="nt">script</span><span class="p">&gt;</span> </pre></div> <p>Then, the Mustache templates can be defined either in a <code>script</code> or <code>template</code> tag like this:</p> <div class="-ta"><pre><span></span><span class="c">&lt;!-- Using template tag. --&gt;</span> <span class="p">&lt;</span><span class="nt">template</span> <span class="na">type</span><span class="o">=</span><span class="s">"amp-mustache"</span><span class="p">&gt;</span> Hello {{world}}! <span class="p">&lt;/</span><span class="nt">template</span><span class="p">&gt;</span> </pre></div> <p>or</p> <div class="-ta"><pre><span></span><span class="p">&lt;</span><span class="nt">script</span> <span class="na">type</span><span class="o">=</span><span class="s">"text/plain"</span> <span class="na">template</span><span class="o">=</span><span class="s">"amp-mustache"</span><span class="p">&gt;</span> <span class="nx">Hello</span> {{world}}<span class="o">!</span> <span class="p">&lt;/</span><span class="nt">script</span><span class="p">&gt;</span> </pre></div> <p>Use <code>template</code> tag wherever possible, as AMP validation provides useful dev-x hints. Use the <code>script</code> template for edge cases and issues with templating in the context of tables. See the "Tables" section further below.</p> <p>How templates are discovered, when they are rendered, how data is provided is all decided by the target AMP element that uses this template to render its content (for example, in an <a href="https://github.com/ampproject/amphtml/blob/main/extensions/amp-mustache/../amp-list/amp-list.md">amp-list</a>, <a href="https://github.com/ampproject/amphtml/blob/main/extensions/amp-mustache/../amp-form/amp-form.md">amp-form</a>, etc.).</p> <h2 id="restrictions">Restrictions</h2> <h3 id="validation">Validation</h3> <p>Like all AMP templates, <code>amp-mustache</code> templates are required to be well-formed DOM fragments. This means that among other things, you can't use <code>amp-mustache</code> to:</p> <ul> <li>Calculate tag name. E.g. <code>&lt;{{tagName}}&gt;</code> is not allowed.</li> <li>Calculate attribute name. E.g. <code>&lt;div {{attrName}}=something&gt;</code> is not allowed.</li> </ul> <p>The output of "triple-mustache" is sanitized to only allow the following tags:</p> <p> </p> <p><code>a</code>, <code>amp-img</code>, <code>article</code>, <code>aside</code>, <code>b</code>, <code>blockquote</code>, <code>br</code>, <code>caption</code>, <code>code</code>, <code>col</code>, <code>colgroup</code>, <code>dd</code>, <code>del</code>, <code>details</code>, <code>div</code>, <code>dl</code>, <code>dt</code>, <code>em</code>, <code>figcaption</code>, <code>figure</code>, <code>footer</code>, <code>h1</code>, <code>h2</code>, <code>h3</code>, <code>header</code>, <code>hr</code>, <code>i</code>, <code>ins</code>, <code>li</code>, <code>main</code>, <code>mark</code>, <code>nav</code>, <code>ol</code>, <code>p</code>, <code>pre</code>, <code>q</code>, <code>s</code>, <code>section</code>, <code>small</code>, <code>span</code>, <code>strong</code>, <code>sub</code>, <code>summary</code>, <code>sup</code>, <code>table</code>, <code>tbody</code>, <code>td</code>, <code>tfoot</code>, <code>th</code>, <code>thead</code>, <code>time</code>, <code>tr</code>, <code>u</code>, <code>ul</code>.</p> <p> </p> <p> </p> <h3 id="sanitization">Sanitization</h3> <p>Mustache output is sanitized for security reasons and to maintain AMP validity. This may result in certain elements and attributes being silently removed.</p> <h2 id="pitfalls">Pitfalls</h2> <h3 id="nested-templates">Nested templates</h3> <p>Per AMP Validation, <code>&lt;template&gt;</code> elements must not be children of other <code>&lt;template&gt;</code> elements. This can happen when nesting two components that use templates, e.g. <code>amp-list</code> and <code>amp-form</code>.</p> <p>To workaround this, <code>&lt;template&gt;</code> elements can also be referenced by <code>id</code> via the <code>template</code> attribute on the component. For example:</p> <div class="-ta"><pre><span></span><span class="p">&lt;</span><span class="nt">amp-list</span> <span class="na">id</span><span class="o">=</span><span class="s">"myList"</span> <span class="na">src</span><span class="o">=</span><span class="s">"https://foo.com/list.json"</span><span class="p">&gt;</span> <span class="p">&lt;</span><span class="nt">template</span> <span class="na">type</span><span class="o">=</span><span class="s">"amp-mustache"</span><span class="p">&gt;</span> <span class="p">&lt;</span><span class="nt">div</span><span class="p">&gt;</span>{{title}}<span class="p">&lt;/</span><span class="nt">div</span><span class="p">&gt;</span> <span class="p">&lt;/</span><span class="nt">template</span><span class="p">&gt;</span> <span class="p">&lt;/</span><span class="nt">amp-list</span><span class="p">&gt;</span> </pre></div> <p>Can also be represented as:</p> <div class="-ta"><pre><span></span><span class="c">&lt;!-- Externalize templates to avoid nesting. --&gt;</span> <span class="p">&lt;</span><span class="nt">template</span> <span class="na">type</span><span class="o">=</span><span class="s">"amp-mustache"</span> <span class="na">id</span><span class="o">=</span><span class="s">"myTemplate"</span><span class="p">&gt;</span> <span class="p">&lt;</span><span class="nt">div</span><span class="p">&gt;</span>{{title}}<span class="p">&lt;/</span><span class="nt">div</span><span class="p">&gt;</span> <span class="p">&lt;/</span><span class="nt">template</span><span class="p">&gt;</span> <span class="p">&lt;</span><span class="nt">amp-list</span> <span class="na">id</span><span class="o">=</span><span class="s">"myList"</span> <span class="na">src</span><span class="o">=</span><span class="s">"https://foo.com/list.json"</span> <span class="na">template</span><span class="o">=</span><span class="s">"myTemplate"</span><span class="p">&gt;</span> <span class="p">&lt;/</span><span class="nt">amp-list</span><span class="p">&gt;</span> </pre></div> <h3 id="tables">Tables</h3> <p>Since AMP template strings must be specified in <code>&lt;template&gt;</code> elements, this can cause unexpected behavior due to browser parsing. For example, <code>&lt;table&gt;</code> elements can cause <a href="https://www.w3.org/TR/html5/syntax.html#unexpected-markup-in-tables">foster parenting</a> of text. In the following example:</p> <div class="-ta"><pre><span></span><span class="p">&lt;</span><span class="nt">template</span> <span class="na">type</span><span class="o">=</span><span class="s">"amp-mustache"</span><span class="p">&gt;</span> <span class="p">&lt;</span><span class="nt">table</span><span class="p">&gt;</span> <span class="p">&lt;</span><span class="nt">tr</span><span class="p">&gt;</span> {{#foo}} <span class="p">&lt;</span><span class="nt">td</span><span class="p">&gt;&lt;/</span><span class="nt">td</span><span class="p">&gt;</span> {{/foo}} <span class="p">&lt;/</span><span class="nt">tr</span><span class="p">&gt;</span> <span class="p">&lt;/</span><span class="nt">table</span><span class="p">&gt;</span> <span class="p">&lt;/</span><span class="nt">template</span><span class="p">&gt;</span> </pre></div> <p>The browser will foster parent the text nodes <code>{{#foo}}</code> and <code>{{/foo}}</code>:</p> <div class="-ta"><pre><span></span>{{#foo}} {{/foo}}<span class="p">&lt;</span><span class="nt">table</span><span class="p">&gt;</span> <span class="p">&lt;</span><span class="nt">tr</span><span class="p">&gt;</span> <span class="p">&lt;</span><span class="nt">td</span><span class="p">&gt;&lt;/</span><span class="nt">td</span><span class="p">&gt;</span> <span class="p">&lt;/</span><span class="nt">tr</span><span class="p">&gt;</span> <span class="p">&lt;/</span><span class="nt">table</span><span class="p">&gt;</span> </pre></div> <p>Workarounds include wrapping Mustache sections in HTML comments (e.g. <code>&lt;!-- {{#bar}} --&gt;</code>), using non-table elements like <code>&lt;div&gt;</code> instead or using a <code>&lt;script type="text/plain"&gt;</code> tag to define your templates.</p> <div class="-ta"><pre><span></span><span class="p">&lt;</span><span class="nt">script</span> <span class="na">type</span><span class="o">=</span><span class="s">"text/plain"</span> <span class="na">template</span><span class="o">=</span><span class="s">"amp-mustache"</span><span class="p">&gt;</span> <span class="o">&lt;</span><span class="nx">table</span><span class="o">&gt;</span> <span class="o">&lt;</span><span class="nx">tr</span><span class="o">&gt;</span> {{#foo}}<span class="o">&lt;</span><span class="nx">td</span><span class="o">&gt;&lt;</span><span class="err">/td&gt;{{/foo}}</span> <span class="o">&lt;</span><span class="err">/tr&gt;</span> <span class="o">&lt;</span><span class="err">/table&gt;</span> <span class="p">&lt;/</span><span class="nt">script</span><span class="p">&gt;</span> </pre></div> <h3 id="quote-escaping">Quote escaping</h3> <p>When using <code>amp-mustache</code> to calculate attribute values, quote escaping can be an issue. For example:</p> <div class="-ta"><pre><span></span><span class="p">&lt;</span><span class="nt">template</span> <span class="na">type</span><span class="o">=</span><span class="s">"amp-mustache"</span><span class="p">&gt;</span> <span class="c">&lt;!-- A double-quote (") in foo will cause malformed HTML. --&gt;</span> <span class="p">&lt;</span><span class="nt">amp-img</span> <span class="na">alt</span><span class="o">=</span><span class="s">"{{foo}}"</span> <span class="na">src</span><span class="o">=</span><span class="s">"example.jpg"</span> <span class="na">width</span><span class="o">=</span><span class="s">"100"</span> <span class="na">height</span><span class="o">=</span><span class="s">"100"</span><span class="p">&gt;&lt;/</span><span class="nt">amp-img</span><span class="p">&gt;</span> <span class="c">&lt;!-- A single-quote (') or double-quote (") in bar will cause an AMP runtime parse error. --&gt;</span> <span class="p">&lt;</span><span class="nt">button</span> <span class="na">on</span><span class="o">=</span><span class="s">"tap:AMP.setState({foo: '{{bar}}'})"</span><span class="p">&gt;</span>Click me<span class="p">&lt;/</span><span class="nt">button</span><span class="p">&gt;</span> <span class="p">&lt;/</span><span class="nt">template</span><span class="p">&gt;</span> </pre></div> <p>Using HTML character codes in the <code>{{foo}}</code> or <code>{{bar}}</code> variables won't work since Mustache will HTML escape <code>&amp;</code> characters (e.g. <code>&amp;quot;</code> -&gt; <code>&amp;amp;quot;</code>). One workaround is to use facsimile characters e.g. ′ (<code>&amp;prime;</code>) and ″ (<code>&amp;Prime;</code>).</p> <h3 id="html-entities">HTML entities</h3> <p>HTML entities are not preserved in <code>&lt;template&gt;</code> elements.</p> <p>This can be an issue if you want to server-side render a <code>&lt;template&gt;</code> containing user-generated text, since user-generated text containing <code>{{</code>, <code>}}</code>, <code>{{{</code>, <code>}}}</code> will be treated as a Mustache section. E.g. replacing <code>{{</code> with HTML entities <code>&amp;lcub;&amp;lcub;</code> won't work because they aren't preserved when the browser parses the <code>&lt;template&gt;</code>.</p> <p>Workarounds include replacing strings like <code>{{</code> with different characters or stripping them outright from user-generated content.</p> <h2 id="validation_1">Validation</h2> <p>See <a href="https://github.com/ampproject/amphtml/blob/main/extensions/amp-mustache/validator-amp-mustache.protoascii">amp-mustache 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! 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