CINXE.COM
Resolving validation errors - amp.dev
<!doctype html><html amp lang="en" i-amphtml-binding i-amphtml-layout i-amphtml-no-boilerplate transformed="self;v=1"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width"><link rel="preload" href="/static/fonts/poppins-v5-latin-700.woff2" as="font" crossorigin><link rel="preload" href="/static/fonts/noto-sans-v7-latin-700.woff2" as="font" crossorigin><meta name="theme-color" content="#005af0"><meta name="description" content="In this section, we'll go through and resolve the AMP validation errors from our AMP page. Note that the errors may appear in a different order in your console."><meta name="twitter:card" content="summary_large_image"><meta name="twitter:description" content="In this section, we'll go through and resolve the AMP validation errors from our AMP page. Note that the errors may appear in a different order in your console."><meta name="twitter:title" content="Resolving validation errors"><meta name="twitter:creator" content="@ampproject"><meta name="twitter:site" content="@ampproject"><meta name="twitter:image" content="https://amp.dev/static/img/sharing/docs-guide-600x314.png"><meta property="og:title" content="Resolving validation errors"><meta property="og:url" content="https://amp.dev/documentation/guides-and-tutorials/start/converting/resolving-errors/"><meta property="og:image" content="https://amp.dev/static/img/sharing/docs-guide-600x314.png"><meta property="og:image:width" content="600"><meta property="og:image:height" content="314"><meta name="supported-amp-formats" content="websites"><meta name="page-locale" content="en,pt_br,zh_cn"><meta http-equiv="origin-trial" content="AviuuiVhVdQ3GpVtxSpyMT+XsL/qGGYmyiyLvYSKPL3rRDLipe/ard5x+DXVlrATtolwX75VtpSKc9IEzLDd4AkAAABmeyJvcmlnaW4iOiJodHRwczovL2FtcC5kZXY6NDQzIiwiZmVhdHVyZSI6IkV4cGVyaW1lbnRhbEF1dG9wbGF5RHluYW1pY0RlbGVnYXRpb24iLCJleHBpcnkiOjE1NzA1Nzg0NDF9"><style amp-runtime i-amphtml-version="012406131415000">html{overflow-x:hidden!important}html.i-amphtml-fie{height:100%!important;width:100%!important}html:not([amp4ads]),html:not([amp4ads]) body{height:auto!important}html:not([amp4ads]) body{margin:0!important}body{-webkit-text-size-adjust:100%;-moz-text-size-adjust:100%;-ms-text-size-adjust:100%;text-size-adjust:100%}html.i-amphtml-singledoc.i-amphtml-embedded{-ms-touch-action:pan-y pinch-zoom;touch-action:pan-y pinch-zoom}html.i-amphtml-fie>body,html.i-amphtml-singledoc>body{overflow:visible!important}html.i-amphtml-fie:not(.i-amphtml-inabox)>body,html.i-amphtml-singledoc:not(.i-amphtml-inabox)>body{position:relative!important}html.i-amphtml-ios-embed-legacy>body{overflow-x:hidden!important;overflow-y:auto!important;position:absolute!important}html.i-amphtml-ios-embed{overflow-y:auto!important;position:static}#i-amphtml-wrapper{overflow-x:hidden!important;overflow-y:auto!important;position:absolute!important;top:0!important;left:0!important;right:0!important;bottom:0!important;margin:0!important;display:block!important}html.i-amphtml-ios-embed.i-amphtml-ios-overscroll,html.i-amphtml-ios-embed.i-amphtml-ios-overscroll>#i-amphtml-wrapper{-webkit-overflow-scrolling:touch!important}#i-amphtml-wrapper>body{position:relative!important;border-top:1px solid transparent!important}#i-amphtml-wrapper+body{visibility:visible}#i-amphtml-wrapper+body .i-amphtml-lightbox-element,#i-amphtml-wrapper+body[i-amphtml-lightbox]{visibility:hidden}#i-amphtml-wrapper+body[i-amphtml-lightbox] .i-amphtml-lightbox-element{visibility:visible}#i-amphtml-wrapper.i-amphtml-scroll-disabled,.i-amphtml-scroll-disabled{overflow-x:hidden!important;overflow-y:hidden!important}amp-instagram{padding:54px 0px 0px!important;background-color:#fff}amp-iframe iframe{box-sizing:border-box!important}[amp-access][amp-access-hide]{display:none}[subscriptions-dialog],body:not(.i-amphtml-subs-ready) [subscriptions-action],body:not(.i-amphtml-subs-ready) [subscriptions-section]{display:none!important}amp-experiment,amp-live-list>[update]{display:none}amp-list[resizable-children]>.i-amphtml-loading-container.amp-hidden{display:none!important}amp-list [fetch-error],amp-list[load-more] [load-more-button],amp-list[load-more] [load-more-end],amp-list[load-more] [load-more-failed],amp-list[load-more] [load-more-loading]{display:none}amp-list[diffable] div[role=list]{display:block}amp-story-page,amp-story[standalone]{min-height:1px!important;display:block!important;height:100%!important;margin:0!important;padding:0!important;overflow:hidden!important;width:100%!important}amp-story[standalone]{background-color:#000!important;position:relative!important}amp-story-page{background-color:#757575}amp-story .amp-active>div,amp-story .i-amphtml-loader-background{display:none!important}amp-story-page:not(:first-of-type):not([distance]):not([active]){transform:translateY(1000vh)!important}amp-autocomplete{position:relative!important;display:inline-block!important}amp-autocomplete>input,amp-autocomplete>textarea{padding:0.5rem;border:1px solid rgba(0,0,0,.33)}.i-amphtml-autocomplete-results,amp-autocomplete>input,amp-autocomplete>textarea{font-size:1rem;line-height:1.5rem}[amp-fx^=fly-in]{visibility:hidden}amp-script[nodom],amp-script[sandboxed]{position:fixed!important;top:0!important;width:1px!important;height:1px!important;overflow:hidden!important;visibility:hidden} /*# sourceURL=/css/ampdoc.css*/[hidden]{display:none!important}.i-amphtml-element{display:inline-block}.i-amphtml-blurry-placeholder{transition:opacity 0.3s cubic-bezier(0.0,0.0,0.2,1)!important;pointer-events:none}[layout=nodisplay]:not(.i-amphtml-element){display:none!important}.i-amphtml-layout-fixed,[layout=fixed][width][height]:not(.i-amphtml-layout-fixed){display:inline-block;position:relative}.i-amphtml-layout-responsive,[layout=responsive][width][height]:not(.i-amphtml-layout-responsive),[width][height][heights]:not([layout]):not(.i-amphtml-layout-responsive),[width][height][sizes]:not(img):not([layout]):not(.i-amphtml-layout-responsive){display:block;position:relative}.i-amphtml-layout-intrinsic,[layout=intrinsic][width][height]:not(.i-amphtml-layout-intrinsic){display:inline-block;position:relative;max-width:100%}.i-amphtml-layout-intrinsic .i-amphtml-sizer{max-width:100%}.i-amphtml-intrinsic-sizer{max-width:100%;display:block!important}.i-amphtml-layout-container,.i-amphtml-layout-fixed-height,[layout=container],[layout=fixed-height][height]:not(.i-amphtml-layout-fixed-height){display:block;position:relative}.i-amphtml-layout-fill,.i-amphtml-layout-fill.i-amphtml-notbuilt,[layout=fill]:not(.i-amphtml-layout-fill),body noscript>*{display:block;overflow:hidden!important;position:absolute;top:0;left:0;bottom:0;right:0}body noscript>*{position:absolute!important;width:100%;height:100%;z-index:2}body noscript{display:inline!important}.i-amphtml-layout-flex-item,[layout=flex-item]:not(.i-amphtml-layout-flex-item){display:block;position:relative;-ms-flex:1 1 auto;flex:1 1 auto}.i-amphtml-layout-fluid{position:relative}.i-amphtml-layout-size-defined{overflow:hidden!important}.i-amphtml-layout-awaiting-size{position:absolute!important;top:auto!important;bottom:auto!important}i-amphtml-sizer{display:block!important}@supports (aspect-ratio:1/1){i-amphtml-sizer.i-amphtml-disable-ar{display:none!important}}.i-amphtml-blurry-placeholder,.i-amphtml-fill-content{display:block;height:0;max-height:100%;max-width:100%;min-height:100%;min-width:100%;width:0;margin:auto}.i-amphtml-layout-size-defined .i-amphtml-fill-content{position:absolute;top:0;left:0;bottom:0;right:0}.i-amphtml-replaced-content,.i-amphtml-screen-reader{padding:0!important;border:none!important}.i-amphtml-screen-reader{position:fixed!important;top:0px!important;left:0px!important;width:4px!important;height:4px!important;opacity:0!important;overflow:hidden!important;margin:0!important;display:block!important;visibility:visible!important}.i-amphtml-screen-reader~.i-amphtml-screen-reader{left:8px!important}.i-amphtml-screen-reader~.i-amphtml-screen-reader~.i-amphtml-screen-reader{left:12px!important}.i-amphtml-screen-reader~.i-amphtml-screen-reader~.i-amphtml-screen-reader~.i-amphtml-screen-reader{left:16px!important}.i-amphtml-unresolved{position:relative;overflow:hidden!important}.i-amphtml-select-disabled{-webkit-user-select:none!important;-ms-user-select:none!important;user-select:none!important}.i-amphtml-notbuilt,[layout]:not(.i-amphtml-element),[width][height][heights]:not([layout]):not(.i-amphtml-element),[width][height][sizes]:not(img):not([layout]):not(.i-amphtml-element){position:relative;overflow:hidden!important;color:transparent!important}.i-amphtml-notbuilt:not(.i-amphtml-layout-container)>*,[layout]:not([layout=container]):not(.i-amphtml-element)>*,[width][height][heights]:not([layout]):not(.i-amphtml-element)>*,[width][height][sizes]:not([layout]):not(.i-amphtml-element)>*{display:none}amp-img:not(.i-amphtml-element)[i-amphtml-ssr]>img.i-amphtml-fill-content{display:block}.i-amphtml-notbuilt:not(.i-amphtml-layout-container),[layout]:not([layout=container]):not(.i-amphtml-element),[width][height][heights]:not([layout]):not(.i-amphtml-element),[width][height][sizes]:not(img):not([layout]):not(.i-amphtml-element){color:transparent!important;line-height:0!important}.i-amphtml-ghost{visibility:hidden!important}.i-amphtml-element>[placeholder],[layout]:not(.i-amphtml-element)>[placeholder],[width][height][heights]:not([layout]):not(.i-amphtml-element)>[placeholder],[width][height][sizes]:not([layout]):not(.i-amphtml-element)>[placeholder]{display:block;line-height:normal}.i-amphtml-element>[placeholder].amp-hidden,.i-amphtml-element>[placeholder].hidden{visibility:hidden}.i-amphtml-element:not(.amp-notsupported)>[fallback],.i-amphtml-layout-container>[placeholder].amp-hidden,.i-amphtml-layout-container>[placeholder].hidden{display:none}.i-amphtml-layout-size-defined>[fallback],.i-amphtml-layout-size-defined>[placeholder]{position:absolute!important;top:0!important;left:0!important;right:0!important;bottom:0!important;z-index:1}amp-img[i-amphtml-ssr]:not(.i-amphtml-element)>[placeholder]{z-index:auto}.i-amphtml-notbuilt>[placeholder]{display:block!important}.i-amphtml-hidden-by-media-query{display:none!important}.i-amphtml-element-error{background:red!important;color:#fff!important;position:relative!important}.i-amphtml-element-error:before{content:attr(error-message)}i-amp-scroll-container,i-amphtml-scroll-container{position:absolute;top:0;left:0;right:0;bottom:0;display:block}i-amp-scroll-container.amp-active,i-amphtml-scroll-container.amp-active{overflow:auto;-webkit-overflow-scrolling:touch}.i-amphtml-loading-container{display:block!important;pointer-events:none;z-index:1}.i-amphtml-notbuilt>.i-amphtml-loading-container{display:block!important}.i-amphtml-loading-container.amp-hidden{visibility:hidden}.i-amphtml-element>[overflow]{cursor:pointer;position:relative;z-index:2;visibility:hidden;display:initial;line-height:normal}.i-amphtml-layout-size-defined>[overflow]{position:absolute}.i-amphtml-element>[overflow].amp-visible{visibility:visible}template{display:none!important}.amp-border-box,.amp-border-box *,.amp-border-box :after,.amp-border-box :before{box-sizing:border-box}amp-pixel{display:none!important}amp-analytics,amp-auto-ads,amp-story-auto-ads{position:fixed!important;top:0!important;width:1px!important;height:1px!important;overflow:hidden!important;visibility:hidden}amp-story{visibility:hidden!important}html.i-amphtml-fie>amp-analytics{position:initial!important}[visible-when-invalid]:not(.visible),form [submit-error],form [submit-success],form [submitting]{display:none}amp-accordion{display:block!important}@media (min-width:1px){:where(amp-accordion>section)>:first-child{margin:0;background-color:#efefef;padding-right:20px;border:1px solid #dfdfdf}:where(amp-accordion>section)>:last-child{margin:0}}amp-accordion>section{float:none!important}amp-accordion>section>*{float:none!important;display:block!important;overflow:hidden!important;position:relative!important}amp-accordion,amp-accordion>section{margin:0}amp-accordion:not(.i-amphtml-built)>section>:last-child{display:none!important}amp-accordion:not(.i-amphtml-built)>section[expanded]>:last-child{display:block!important} /*# sourceURL=/css/ampshared.css*/</style><script async src="https://cdn.ampproject.org/v0.mjs" type="module" crossorigin="anonymous"></script><script async nomodule src="https://cdn.ampproject.org/v0.js" crossorigin="anonymous"></script><script async src="https://cdn.ampproject.org/v0/amp-analytics-0.1.mjs" custom-element="amp-analytics" type="module" crossorigin="anonymous"></script><script async nomodule src="https://cdn.ampproject.org/v0/amp-analytics-0.1.js" crossorigin="anonymous" custom-element="amp-analytics"></script><script async src="https://cdn.ampproject.org/v0/amp-animation-0.1.mjs" custom-element="amp-animation" type="module" crossorigin="anonymous"></script><script async nomodule src="https://cdn.ampproject.org/v0/amp-animation-0.1.js" crossorigin="anonymous" custom-element="amp-animation"></script><script async src="https://cdn.ampproject.org/v0/amp-bind-0.1.mjs" custom-element="amp-bind" type="module" crossorigin="anonymous"></script><script async nomodule src="https://cdn.ampproject.org/v0/amp-bind-0.1.js" crossorigin="anonymous" custom-element="amp-bind"></script><script async src="https://cdn.ampproject.org/v0/amp-consent-0.1.mjs" custom-element="amp-consent" type="module" crossorigin="anonymous"></script><script async nomodule src="https://cdn.ampproject.org/v0/amp-consent-0.1.js" crossorigin="anonymous" custom-element="amp-consent"></script><script async src="https://cdn.ampproject.org/v0/amp-geo-0.1.mjs" custom-element="amp-geo" type="module" crossorigin="anonymous"></script><script async nomodule src="https://cdn.ampproject.org/v0/amp-geo-0.1.js" crossorigin="anonymous" custom-element="amp-geo"></script><script async src="https://cdn.ampproject.org/v0/amp-install-serviceworker-0.1.mjs" custom-element="amp-install-serviceworker" type="module" crossorigin="anonymous"></script><script async nomodule src="https://cdn.ampproject.org/v0/amp-install-serviceworker-0.1.js" crossorigin="anonymous" custom-element="amp-install-serviceworker"></script><script async src="https://cdn.ampproject.org/v0/amp-position-observer-0.1.mjs" custom-element="amp-position-observer" type="module" crossorigin="anonymous"></script><script async nomodule src="https://cdn.ampproject.org/v0/amp-position-observer-0.1.js" crossorigin="anonymous" custom-element="amp-position-observer"></script><script async src="https://cdn.ampproject.org/v0/amp-sidebar-0.1.mjs" custom-element="amp-sidebar" type="module" crossorigin="anonymous"></script><script async nomodule src="https://cdn.ampproject.org/v0/amp-sidebar-0.1.js" crossorigin="anonymous" custom-element="amp-sidebar"></script><link rel="shortcut icon" href="/static/img/favicon.png"><link rel="canonical" href="https://amp.dev/documentation/guides-and-tutorials/start/converting/resolving-errors/"><link rel="alternate" hreflang="x-default" href="https://amp.dev/documentation/guides-and-tutorials/start/converting/resolving-errors/"><link rel="alternate" hreflang="de" href="https://amp.dev/de/documentation/guides-and-tutorials/start/converting/resolving-errors/"><link rel="alternate" hreflang="fr" href="https://amp.dev/fr/documentation/guides-and-tutorials/start/converting/resolving-errors/"><link rel="alternate" hreflang="ar" href="https://amp.dev/ar/documentation/guides-and-tutorials/start/converting/resolving-errors/"><link rel="alternate" hreflang="es" href="https://amp.dev/es/documentation/guides-and-tutorials/start/converting/resolving-errors/"><link rel="alternate" hreflang="it" href="https://amp.dev/it/documentation/guides-and-tutorials/start/converting/resolving-errors/"><link rel="alternate" hreflang="id" href="https://amp.dev/id/documentation/guides-and-tutorials/start/converting/resolving-errors/"><link rel="alternate" hreflang="ja" href="https://amp.dev/ja/documentation/guides-and-tutorials/start/converting/resolving-errors/"><link rel="alternate" hreflang="ko" href="https://amp.dev/ko/documentation/guides-and-tutorials/start/converting/resolving-errors/"><link rel="alternate" hreflang="pt_BR" href="https://amp.dev/pt_br/documentation/guides-and-tutorials/start/converting/resolving-errors/"><link rel="alternate" hreflang="ru" href="https://amp.dev/ru/documentation/guides-and-tutorials/start/converting/resolving-errors/"><link rel="alternate" hreflang="tr" href="https://amp.dev/tr/documentation/guides-and-tutorials/start/converting/resolving-errors/"><link rel="alternate" hreflang="zh_CN" href="https://amp.dev/zh_cn/documentation/guides-and-tutorials/start/converting/resolving-errors/"><link rel="alternate" hreflang="pl" href="https://amp.dev/pl/documentation/guides-and-tutorials/start/converting/resolving-errors/"><link rel="alternate" hreflang="vi" href="https://amp.dev/vi/documentation/guides-and-tutorials/start/converting/resolving-errors/"><title>Resolving validation errors - amp.dev</title><script type="application/ld+json">{"@context":"http://schema.org","@type":"Webpage","url":"https://amp.dev/documentation/guides-and-tutorials/start/converting/resolving-errors/ ","name":"amp.dev","headline":"Resolving validation errors","description":"In this section, we\u0026#39;ll go through and resolve the AMP validation errors from our AMP page. Note that the errors may appear in a different order in your console.","mainEntityOfPage":{"@type":"WebPage","@id":"https://amp.dev"},"publisher":{"@type":"Organization","name":"AMP Project","logo":{"url":"https://amp.dev/static/img/icons/icon-512x512.png","width":512,"height":512,"@type":"ImageObject"}},"image":{"@type":"ImageObject","url":"https://amp.dev/static/img/sharing/docs-guide-600x314.png","width":600,"height":314}}</script><style amp-custom>@font-face{font-family:system;font-style:normal;font-weight:300;src:local(".SFNSText-Light"),local(".HelveticaNeueDeskInterface-Light"),local(".LucidaGrandeUI"),local("Ubuntu Light"),local("Segoe UI Light"),local("Roboto-Light"),local("DroidSans"),local("Tahoma")}@font-face{font-family:system;font-style:italic;font-weight:300;src:local(".SFNSText-LightItalic"),local(".HelveticaNeueDeskInterface-Italic"),local(".LucidaGrandeUI"),local("Ubuntu Light Italic"),local("Segoe UI Light Italic"),local("Roboto-LightItalic"),local("DroidSans"),local("Tahoma")}@font-face{font-family:system;font-style:normal;font-weight:400;src:local(".SFNSText-Regular"),local(".HelveticaNeueDeskInterface-Regular"),local(".LucidaGrandeUI"),local("Ubuntu"),local("Segoe UI"),local("Roboto-Regular"),local("DroidSans"),local("Tahoma")}@font-face{font-family:system;font-style:italic;font-weight:400;src:local(".SFNSText-Italic"),local(".HelveticaNeueDeskInterface-Italic"),local(".LucidaGrandeUI"),local("Ubuntu Italic"),local("Segoe UI Italic"),local("Roboto-Italic"),local("DroidSans"),local("Tahoma")}@font-face{font-family:system;font-style:normal;font-weight:500;src:local(".SFNSText-Medium"),local(".HelveticaNeueDeskInterface-MediumP4"),local(".LucidaGrandeUI"),local("Ubuntu Medium"),local("Segoe UI Semibold"),local("Roboto-Medium"),local("DroidSans-Bold"),local("Tahoma Bold")}@font-face{font-family:system;font-style:italic;font-weight:500;src:local(".SFNSText-MediumItalic"),local(".HelveticaNeueDeskInterface-MediumItalicP4"),local(".LucidaGrandeUI"),local("Ubuntu Medium Italic"),local("Segoe UI Semibold Italic"),local("Roboto-MediumItalic"),local("DroidSans-Bold"),local("Tahoma Bold")}@font-face{font-family:system;font-style:normal;font-weight:700;src:local(".SFNSText-Bold"),local(".HelveticaNeueDeskInterface-Bold"),local(".LucidaGrandeUI"),local("Ubuntu Bold"),local("Roboto-Bold"),local("DroidSans-Bold"),local("Segoe UI Bold"),local("Tahoma Bold")}@font-face{font-family:system;font-style:italic;font-weight:700;src:local(".SFNSText-BoldItalic"),local(".HelveticaNeueDeskInterface-BoldItalic"),local(".LucidaGrandeUI"),local("Ubuntu Bold Italic"),local("Roboto-BoldItalic"),local("DroidSans-Bold"),local("Segoe UI Bold Italic"),local("Tahoma Bold")}@font-face{font-family:Noto Sans;font-style:normal;font-weight:400;font-display:optional;src:local("Noto Sans"),local("NotoSans"),url(https://amp.dev/static/fonts/noto-sans-v7-latin-regular.woff2) format("woff2"),url(https://amp.dev/static/fonts/noto-sans-v7-latin-regular.woff) format("woff")}@font-face{font-family:Noto Sans;font-style:normal;font-weight:700;font-display:optional;src:local("Noto Sans Bold"),local("NotoSans-Bold"),url(https://amp.dev/static/fonts/noto-sans-v7-latin-700.woff2) format("woff2"),url(https://amp.dev/static/fonts/noto-sans-v7-latin-700.woff) format("woff")}@font-face{font-family:Poppins;font-style:normal;font-weight:700;font-display:optional;src:local("Poppins Bold"),local("Poppins-Bold"),url(https://amp.dev/static/fonts/poppins-v5-latin-700.woff2) format("woff2"),url(https://amp.dev/static/fonts/poppins-v5-latin-700.woff) format("woff")}@font-face{font-family:Fira Mono;font-style:normal;font-weight:400;font-display:optional;src:local("Fira Mono"),local("FiraMono"),url(https://amp.dev/static/fonts/fira-mono-v7-latin-500.woff2) format("woff2"),url(https://amp.dev/static/fonts/fira-mono-v7-latin-500.woff) format("woff")}*{box-sizing:border-box}body,html{padding:0;margin:0;min-width:240px;color:#48525c;background-color:#fff;font-size:16px;font-family:Noto Sans,system;overflow-x:hidden;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;touch-action:manipulation}@media(max-width:240px){body,html{font-size:14px}}body>*>:not(.ap-o-code-preview)>*>.amp-carousel-button{width:3em;height:3em;border-radius:50%;box-shadow:0 10px 15px 0 rgba(0,0,0,.4);transition:.4s;background-color:#fff;position:relative;box-sizing:border-box;margin:1em;border-style:none;background-position:50% 50%;background-repeat:no-repeat;z-index:10;pointer-events:all}body>*>:not(.ap-o-code-preview)>*>.amp-carousel-button-prev{background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' fill='%23005AF0'%3E%3Cpath d='M15 8.25H5.87l4.19-4.19L9 3 3 9l6 6 1.06-1.06-4.19-4.19H15v-1.5z'/%3E%3C/svg%3E")}body>*>:not(.ap-o-code-preview)>*>.amp-carousel-button-next{background-image:url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='18' height='18' fill='%23005AF0' %3E%3Cpath d='M9 3L7.94 4.06l4.19 4.19H3v1.5h9.13l-4.19 4.19L9 15l6-6z'/%3E%3C/svg%3E")}body>*>:not(.ap-o-code-preview)>*>.amp-carousel-button:hover{cursor:pointer;box-shadow:0 20px 30px 0 rgba(0,0,0,.2);background-color:#fff}:target:before{content:"";display:block;visibility:hidden;height:120px;margin-top:-120px}@media(min-width:1024px){h1:target:before{height:75px;margin-top:-75px}h2:target:before{height:81px;margin-top:-81px}h3:target:before{height:87px;margin-top:-87px}h4:target:before{height:90px;margin-top:-90px}h5:target:before{height:93px;margin-top:-93px}h6:target:before{height:97px;margin-top:-97px}}h1,h2,h3,h4,h5{margin-top:1.5rem;margin-bottom:.75em;font-family:Poppins,system;font-weight:700;line-height:1.2em;color:#20202a}h1{font-size:2.2rem;margin-top:3rem}section.-t h1:first-of-type{margin-top:0}@media(min-width:768px){section.-t h1:first-of-type{margin-bottom:2rem}}h2{font-size:1.8rem;margin-top:2rem}h3{font-size:1.414rem;margin-top:1.8rem}h4{font-size:1.2rem}h5{font-size:1rem}.-t .intro,.ap--section .intro{font-size:1rem;padding:0}.-t .intro *,.ap--section .intro *{font-size:inherit}.-t p,.ap--section p{line-height:1.6rem;font-weight:400;color:#48525c;display:block;margin-top:1.1em;margin-bottom:0;font-size:1rem}.-t p small,.ap--section p small{font-size:.875rem}.-t code,.ap--section code{display:inline;padding:2px 4px;font-family:Fira Mono,monospace;font-weight:500;word-break:normal;color:#000;background-color:#e2e5e6;font-size:.9em}.-t code,.-t p,.ap--section code,.ap--section p{overflow-wrap:break-word}.-t a,.ap--section a{position:relative;z-index:10}.-t a code,.ap--section a code{color:#005af0;z-index:-1}.-t pre,.ap--section pre{font-family:Fira Mono,monospace;font-weight:500;font-size:1rem;white-space:pre-wrap}.-t>ol,.-t>ul,.ap--section>ol,.ap--section>ul{line-height:1.6rem;font-weight:400;color:#48525c;display:block;padding-left:2em;margin:1.5em 0}.-t>ol ol,.-t>ol ul,.-t>ul ol,.-t>ul ul,.ap--section>ol ol,.ap--section>ol ul,.ap--section>ul ol,.ap--section>ul ul{padding-left:2em;margin:0}.-t>ol li,.-t>ul li,.ap--section>ol li,.ap--section>ul li{padding-left:.5em}.-t>ol li p,.-t>ul li p,.ap--section>ol li p,.ap--section>ul li p{font-size:1em}.-t figure figcaption,.ap--section figure figcaption{line-height:1.6rem;font-weight:400;color:#48525c;font-size:.8125rem;margin-top:.3em}.-t hr,.ap--section hr{height:1px;margin:.75em 0;background-color:#ebebf0;border:none}.-n{display:flex;align-items:center;text-decoration:none;padding:0 0 1.5em;margin:0}.-r{line-height:1.6rem;font-weight:400;color:#48525c;font-size:.875rem;font-weight:700;color:#005af0;line-height:1.3;transition:transform .3s ease}.-i{fill:#005af0;padding:.438em 0;margin-bottom:auto;margin-right:.625em;box-sizing:initial;transition:transform .3s ease}.-n:hover .-i,.-n:hover .-r{transform:translateX(10px)}.-s{border-bottom:1px solid #ebebf0}.-s .-r{font-size:1rem;font-family:Poppins,system;font-weight:700;color:#000;padding-left:10px}.-s .-i{width:1.375em;height:1.375em;fill:#fff;background-color:#005af0;overflow:hidden;padding:.563em}.-s .-i,.-s:hover .-i{box-shadow:0 10px 20px 0 rgba(0,0,0,.25)}.-s:hover .-i svg{animation:duepduep .3s ease}a{font-weight:700;text-decoration:none;color:#005af0}a code{display:inline;padding:2px 4px;font-family:Fira Mono,monospace;font-weight:500;word-break:normal;color:#000;background-color:#e2e5e6;font-size:.9em;color:#005af0}.ap-a-ico{display:flex;font-size:medium;box-sizing:initial;justify-content:center;width:1em;height:1em}.ap-a-btn{font-family:Poppins,system;font-weight:700;line-height:1.2em;color:#20202a;font-size:1em;color:#fff;display:inline-block;max-width:100%;width:auto;height:auto;padding:.75em 1.75em;margin:0;text-decoration:none;text-align:center;border-radius:3px;background-color:#005af0;border:none;cursor:pointer;box-shadow:0 15px 35px -5px rgba(0,0,0,.25);transition:transform .3s ease,box-shadow .3s ease}.ap-a-btn:hover{transform:translateY(-.125em);box-shadow:0 25px 20px -15px rgba(0,0,0,.15)}@media(min-width:768px){.ap-a-btn{padding:1em 2em}}.-o{right:20px;left:auto;bottom:20px;width:calc(100% - 40px);padding:15px;line-height:1.6rem;font-weight:400;color:#48525c;font-size:.875rem;background-color:#fff;box-shadow:0 15px 30px 0 rgba(0,0,0,.15);border-radius:8px}@media(min-width:768px){.-o{max-width:500px}}.-u{position:absolute;right:15px;top:15px;-webkit-appearance:none;background-color:transparent;border:none;padding:0}.-u svg{width:10px;height:10px}.-o button{cursor:pointer}.ap--footer{position:relative;z-index:15;padding:3em 0 2em;line-height:1.6rem;font-weight:400;color:#48525c;font-size:1rem;color:#fff;background:linear-gradient(45deg,#48525c,#20202a)}.-a{width:100%;max-width:1440px;padding:0 20px;margin:0 auto}.-f{padding-bottom:4em}@media(min-width:768px){.-f{display:flex;align-items:center}}.-l{display:flex;flex-direction:column;margin-left:auto}@media(min-width:1024px){.-l{flex-direction:row}}.-c{margin:3em 2em 1em 0;color:#fff}@media(min-width:768px){.-c{margin:auto 2em auto 1em}}.-h{display:flex;list-style:none;padding:0;margin:0}.-p{flex:1 0 auto}@media(min-width:768px){.-p{margin:16px}}.-d{width:2.5em;height:2.5em;fill:#fff}@media(max-width:240px){.-d{font-size:14px}}@media(min-width:768px){.-v{display:grid;grid-gap:30px;grid-template-columns:repeat(12,1fr)}}.-m{flex:1 1 100%}.-m:nth-child(odd){grid-column:span 3}@media(max-width:1023px){.-m:nth-child(odd){grid-column:span 6}}.-m:nth-child(2n+2){grid-column:span 3}@media(max-width:1023px){.-m:nth-child(2n+2){grid-column:span 6}}.-g{color:#fff}.-y{list-style:none;padding:0}@media(min-width:768px){.-y+.-g{margin-top:2.5em}}.-b{position:relative}.-w{padding-left:35px;font-size:.8125rem;color:#fff}.-x{position:absolute;left:10px;top:8px;width:12px;height:12px;fill:#fff}.-k{display:flex;flex-direction:column;padding-top:4em}@media(min-width:768px){.-k{flex-direction:row;align-items:flex-end}}.-_{width:50%;max-width:200px;margin-bottom:40px;margin-right:auto}@media(min-width:768px){.-_{margin-bottom:0}}.-j{list-style:none;padding:0;margin:0}.-q{display:inline-block;margin-right:1em}.-z{font-size:.8125rem;font-weight:400;color:#fff}.-te{display:block;font-size:.875rem;margin-top:2em;color:#e2e5e6}.-te a{color:#fafafc}.ap-m-tutorial-progress{position:absolute;top:0;left:-4px;height:100%;width:2px;background-color:#e2e5e6}.ap-m-tutorial-progress-finished{background-color:#09a600}.ap-m-format-toggle{position:-webkit-sticky;position:sticky;top:0;margin:0 10px;padding:10px 0 0;width:100%;max-width:85%;z-index:12}@media(min-width:768px){.ap-m-format-toggle{padding:0;margin:0 15px 0 0;max-width:100%}}.ap-m-format-toggle-selected{border:0}.amp-mode-touch .ap-m-format-toggle-selected{position:relative}.ap-m-format-toggle-selected:focus:after,.ap-m-format-toggle-selected:hover:after{position:absolute;top:0;left:0;content:"";display:block;height:300%;width:100%}.ap-m-format-toggle-link,.ap-m-format-toggle-selected{z-index:3;display:flex;align-items:center;width:100%;margin:0 0 2px;padding:5px 8px;overflow:hidden;line-height:1.6rem;font-weight:400;color:#48525c;font-family:Poppins,system;font-weight:700;font-size:12px;text-align:left;border-radius:4px;color:#000;background:#ebebf0;transition:opacity .2s ease;box-shadow:0 5px 15px -5px rgba(0,0,0,.25)}.ap-m-format-toggle-link .ap-a-ico,.ap-m-format-toggle-selected .ap-a-ico{width:14px;height:14px;margin-right:8px;fill:#000}.ap-m-format-toggle-link{color:#000;background:#ebebf0}.ap-m-format-toggle-link .ap-a-ico{fill:#000}.ap-m-format-toggle-link-websites.ap-m-format-toggle-selected,.ap-m-format-toggle-link-websites:hover{background:linear-gradient(225deg,#00dcc0,#005af0 75%);color:#fff}.ap-m-format-toggle-link-websites.ap-m-format-toggle-selected .ap-a-ico,.ap-m-format-toggle-link-websites:hover .ap-a-ico{fill:#fff}.ap-m-format-toggle-link-stories.ap-m-format-toggle-selected,.ap-m-format-toggle-link-stories:hover{background:linear-gradient(225deg,#ec6600,#ffdc00 75%);color:#20202a}.ap-m-format-toggle-link-stories.ap-m-format-toggle-selected .ap-a-ico,.ap-m-format-toggle-link-stories:hover .ap-a-ico{fill:#20202a}.ap-m-format-toggle-link-ads.ap-m-format-toggle-selected,.ap-m-format-toggle-link-ads:hover{background:linear-gradient(225deg,#eb49e1,#5500d7 75%);color:#fff}.ap-m-format-toggle-link-ads.ap-m-format-toggle-selected .ap-a-ico,.ap-m-format-toggle-link-ads:hover .ap-a-ico{fill:#fff}.ap-m-format-toggle-link-email.ap-m-format-toggle-selected,.ap-m-format-toggle-link-email:hover{background:linear-gradient(225deg,#09a600,#e1eb64 75%);color:#20202a}.ap-m-format-toggle-link-email.ap-m-format-toggle-selected .ap-a-ico,.ap-m-format-toggle-link-email:hover .ap-a-ico{fill:#20202a}.ap-m-format-toggle-angle{margin-right:0;margin-left:auto}.ap-m-format-toggle-formats{position:absolute;width:100%;z-index:2;pointer-events:none;opacity:0;transform:translateY(-20px);transition:all .2s ease;transition-delay:.05s}.ap-m-format-toggle-formats:focus-within,.ap-m-format-toggle-formats:hover,.ap-m-format-toggle-selected:focus+.ap-m-format-toggle-formats,.ap-m-format-toggle-selected:hover+.ap-m-format-toggle-formats{pointer-events:auto;opacity:1;transform:translateY(0)}body{top:0;left:0;background-repeat:no-repeat;background-size:100% auto;background-position:100% 0;background-attachment:fixed}body.ap--websites{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1024 768'%3E%3Cdefs%3E%3ClinearGradient id='a' x1='239.67' y1='855.23' x2='606.28' y2='-152.04' gradientUnits='userSpaceOnUse'%3E%3Cstop offset='0' stop-color='%23fff' stop-opacity='0'/%3E%3Cstop offset='1' stop-color='%23d5e6f2'/%3E%3C/linearGradient%3E%3C/defs%3E%3Cg%3E%3Cpath fill='url(%23a)' d='M0 0h1024v214L786.37 768H0V0z'/%3E%3C/g%3E%3C/svg%3E%0A")}body.ap--ads{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1024 768'%3E%3Cdefs%3E%3ClinearGradient id='a' x1='239.67' x2='606.28' y1='855.23' y2='-152.04' gradientUnits='userSpaceOnUse'%3E%3Cstop offset='0' stop-color='%23fff' stop-opacity='0'/%3E%3Cstop offset='1' stop-color='%23ddd3eb'/%3E%3C/linearGradient%3E%3C/defs%3E%3Cg%3E%3Cpath fill='url(%23a)' d='M0 0h1024v214L786.37 768H0V0z'/%3E%3C/g%3E%3C/svg%3E%0A")}body.ap--stories{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1024 768'%3E%3Cdefs%3E%3ClinearGradient id='a' x1='239.67' x2='606.28' y1='855.23' y2='-152.04' gradientUnits='userSpaceOnUse'%3E%3Cstop offset='0' stop-color='%23fff' stop-opacity='0'/%3E%3Cstop offset='1' stop-color='%23ebdfd3'/%3E%3C/linearGradient%3E%3C/defs%3E%3Cg%3E%3Cpath fill='url(%23a)' d='M0 0h1024v214L786.37 768H0V0z'/%3E%3C/g%3E%3C/svg%3E%0A")}body.ap--email{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1024 768'%3E%3Cdefs%3E%3ClinearGradient id='a' x1='239.67' x2='606.28' y1='855.23' y2='-152.04' gradientUnits='userSpaceOnUse'%3E%3Cstop offset='0' stop-color='%23fff' stop-opacity='0'/%3E%3Cstop offset='1' stop-color='%23d7ebd3'/%3E%3C/linearGradient%3E%3C/defs%3E%3Cg%3E%3Cpath fill='url(%23a)' d='M0 0h1024v214L786.37 768H0V0z'/%3E%3C/g%3E%3C/svg%3E%0A")}.ap--ampsidebar{width:100%;max-width:90vw;background:#fafafc}.ap--ampsidebar-toolbar{top:86px;height:100vh;max-height:calc(100vh - 86px)}@media(min-width:768px){.ap--ampsidebar-toolbar{position:-webkit-sticky;position:sticky;overflow:auto}}.ap--ampsidebar-toolbar>ul{-webkit-overflow-scrolling:touch;margin:0;padding:0}@media(min-width:768px){.ap--ampsidebar-toolbar>ul{overflow:auto;max-height:100%}}.ap--ampsidebar-toolbar>ul::-webkit-scrollbar{width:6px;height:6px}.ap--ampsidebar-toolbar>ul::-webkit-scrollbar-thumb{border-radius:3px;background-color:#91979d}.ap--ampsidebar-toolbar>ul::-webkit-scrollbar-corner{background-color:transparent}.ap--ampsidebar-toolbar>ul::-webkit-scrollbar-thumb{background-color:rgba(0,0,0,.1)}.ap-o-sidebar-default{max-width:100%}@media(min-width:768px){.ap-o-sidebar-default .ap-o-sidebar{width:auto;min-height:400px;padding-bottom:0;margin-right:0;margin-left:-10px;background:0 0;box-shadow:none}}.ap-o-sidebar-default .nav{margin:15px 0 0;padding-bottom:15px}.ap-o-sidebar-default .nav-list{max-width:300px;list-style:none;padding:0;margin:0}.ap-o-sidebar-default .nav-list.level-1{margin:0 15px}.ap-o-sidebar-default .nav-list .nav-list{display:none;margin-bottom:20px}.ap-o-sidebar-default .nav-item{position:relative;margin:0;padding:0}.ap-o-sidebar-default .nav-item.level-1{border-bottom:1px solid rgba(0,0,0,.15)}.ap-o-sidebar-default .nav-item.level-1:last-child{border-bottom:none}.ap-o-sidebar-default .nav-item.level-1 .nav-link{padding:10px 25px 10px 20px;text-transform:uppercase;font-size:1.125rem;font-family:Poppins,system;font-weight:700;color:#000}.ap-o-sidebar-default .nav-item.level-1 .nav-icon,.ap-o-sidebar-default .nav-item.level-1 .nav-trigger{height:46px}.ap-o-sidebar-default .nav-item.level-1 .nav-icon .ap-a-ico{margin-top:16px}.ap-o-sidebar-default .nav-item.level-2 .nav-link{padding:7px 25px 8px 20px;text-transform:unset;line-height:1.6rem;font-weight:400;color:#48525c;font-family:Noto Sans,system;font-size:.875rem;line-height:1.4em}.ap-o-sidebar-default .nav-item.level-2 .nav-icon,.ap-o-sidebar-default .nav-item.level-2 .nav-trigger{height:33px}.ap-o-sidebar-default .nav-item.level-2 .nav-icon .ap-a-ico{width:10px;height:10px;margin-top:10px}.ap-o-sidebar-default .nav-item.level-3{margin-left:24px}.ap-o-sidebar-default .nav-item.level-3 .nav-link{padding:7px 25px 8px 20px;font-size:.8125rem}.ap-o-sidebar-default .nav-item.level-3.active{background:rgba(51,61,71,.1);border-radius:4px}.ap-o-sidebar-default .nav-item.active>.nav-link{font-weight:700;color:#005af0}.ap-o-sidebar-default .nav-item:hover>.nav-link{color:#005af0}.ap-o-sidebar-default .nav-item-tutorial-divider{border-bottom:1px dashed rgba(0,0,0,.15)}.ap-o-sidebar-default .nav-item-tutorial-divider:first-child,.ap-o-sidebar-default .nav-item-tutorial-divider:last-child{display:none}.ap-o-sidebar-default .nav-link{position:relative;display:block;padding:0;margin:0;color:rgba(0,0,0,.75);border:none;background-color:transparent}.ap-o-sidebar-default .nav-link-lastword{white-space:nowrap}.ap-o-sidebar-default .nav-icon,.ap-o-sidebar-default .nav-trigger{position:absolute;top:0;width:20px;padding:0;margin:0;background:none transparent;border:none;cursor:pointer}.ap-o-sidebar-default .nav-trigger{-webkit-appearance:none;z-index:1}.ap-o-sidebar-default .nav-trigger:checked~ul{display:block}.ap-o-sidebar-default .nav-trigger:checked+.nav-icon .ap-a-ico{transform:rotate(0)}.ap-o-sidebar-default .nav-trigger:focus{outline:1px dotted #212121;outline:5px auto -webkit-focus-ring-color}.ap-o-sidebar-default .nav-icon .ap-a-ico{width:12px;height:12px;transform:rotate(-90deg)}.ap-o-sidebar-default .nav-type-icon{display:inline-block;vertical-align:top;width:20px;height:20px;margin-left:6px}.ap-o-sidebar-default .nav span.nav-link+.nav-trigger{width:calc(100% + 15px)}.ap-m-tip{display:flex;padding:15px;margin-bottom:20px;border-radius:4px;background-color:#ebebf0;border:1px solid #e2e5e6}@media(min-width:768px){.ap-m-tip{padding:30px}}.ap-m-tip code{white-space:normal}.ap-m-tip-icon{width:36px;height:36px;margin-top:5px;margin-right:14px}@media(min-width:768px){.ap-m-tip-icon{margin-right:26px}}.ap-m-tip-content{font-size:.875rem;min-width:0}.ap-m-tip-content h4{font-size:1rem;margin:0 0 .75em}.ap-m-tip-content ol,.ap-m-tip-content p,.ap-m-tip-content ul{font-size:.875rem}.ap-m-tip-content ol:first-child,.ap-m-tip-content p:first-child,.ap-m-tip-content ul:first-child{margin-top:0}.ap-breadcrumbs,.-ou{display:flex;align-items:center;font-family:Poppins,system;font-weight:700;font-size:.8125rem}.ap-breadcrumbs-angle,.-oa{width:10px;height:10px;margin:0 6px;transform:rotate(-90deg)}.ap--toc{width:100%}@media(min-width:1024px){.ap--toc{background:0 0;box-shadow:none;padding-right:10px}}.ap-o-toc{--spacing-top:90px;position:relative;z-index:1;top:0;right:0;width:calc(100% - 20px);overflow-y:auto;-webkit-overflow-scrolling:touch;background-color:#fff;box-shadow:0 2px 10px 0 rgba(0,0,0,.07);border-radius:8px;padding:15px;margin-bottom:10px}.ap-o-toc::-webkit-scrollbar{width:6px;height:6px}.ap-o-toc::-webkit-scrollbar-thumb{border-radius:3px;background-color:#91979d}.ap-o-toc::-webkit-scrollbar-corner{background-color:transparent}.ap-o-toc::-webkit-scrollbar-thumb{background-color:rgba(0,0,0,.1)}@media(min-width:768px){.ap-o-toc{width:100%}}@media(min-width:1024px){.ap-o-toc{position:-webkit-sticky;position:sticky;z-index:1;padding:0 10px 0 0;margin:0;height:auto;top:var(--spacing-top);right:auto;padding-bottom:var(--spacing-top);background:0 0;box-shadow:none;overflow-y:scroll;max-height:calc(100vh - var(--spacing-top))}}.ap-o-toc-hl{font-family:Poppins,system;font-weight:700;cursor:pointer;width:100%;margin-bottom:0}@media(min-width:1024px){.ap-o-toc-hl{margin-bottom:10px}}.ap-o-toc-toggle{display:flex;align-items:center;justify-content:space-between;outline:0}@media(min-width:1024px){.ap-o-toc-toggle{position:-webkit-sticky;position:sticky;top:0;background:#fafafc}}.ap-o-toc ul{list-style:none;margin:0;padding:0;transition:.4s}.ap-o-toc ul>li a{display:block;padding-bottom:20px;line-height:1.6rem;font-weight:400;color:#48525c;font-size:.8125rem;font-weight:700;line-height:1rem}.ap-o-toc ul>li>ul{padding-left:10px;text-transform:none}.ap-o-toc ul>li>ul li a{font-weight:400}@media(max-width:1023px){.ap-o-toc .-of:not(:checked)+ul{display:none;transition:.2s}.ap-o-toc .-of:checked+ul{margin-top:15px}}.ap-o-toc .nav-icon svg{width:15px;height:15px}@media(min-width:1024px){.ap-o-toc .nav-icon{display:none}}.ap-o-toc .nav-icon .ap-a-ico{display:inline-block;transform:rotate(-90deg)}.ap-o-toc.contentmenuopen .nav-icon .ap-a-ico{transform:rotate(0)}#sidebar-left[aria-hidden=true]:not([hidden])~.ap--main .-ol{animation:moveSidebarToggleBackwards .233s cubic-bezier(0,0,.21,1) forwards}#sidebar-left[aria-hidden=true]:not([hidden])~.ap--main .-ol .label-icon svg{transform:rotate(180deg)}#sidebar-left[aria-hidden=true]:not([hidden])~.ap--main .-ol .label-title{transform:translateX(0) scaleX(1);transform-origin:left center}#sidebar-left[open]~.ap--main .-ol{left:0;margin-left:0;animation:moveSidebarToggleForwards .233s cubic-bezier(0,0,.21,1) forwards}#sidebar-left[open]~.ap--main .-ol .label-icon svg{transform:rotate(0)}#sidebar-left[open]~.ap--main .-ol .label-title{transform:translateX(-150vw) scaleX(0);transform-origin:left center}#sidebar-left[aria-hidden=true]:not([hidden])~.ap--main .-ol,#sidebar-left[open]~.ap--main .-ol{z-index:9999999999}.-oc{position:absolute;top:50px}.-oh{position:fixed;top:-99px}.-op{position:fixed;z-index:15;font-size:12px;font-family:Poppins,system;font-weight:700;color:#fff;fill:#fff;cursor:pointer;display:flex;align-items:center}.-op .label-icon{border-radius:4px;background:#005af0;height:35px;width:32px;padding-left:2px;display:flex;justify-content:center;align-items:center;box-shadow:0 10px 20px -5px rgba(0,0,0,.25);z-index:1}.-op .label-icon svg{height:14px;width:14px;transition:transform .233s cubic-bezier(0,0,.21,1)}.-op .label-title{left:32px;display:flex;align-items:center;height:35px;margin-left:-5px;padding:5px 10px 5px 5px;white-space:nowrap;border-radius:0 4px 4px 0;background:#005af0;box-shadow:0 10px 20px -5px rgba(0,0,0,.25);transform:scaleX(0);transform-origin:left;transition:transform .233s cubic-bezier(0,0,.21,1)}.-od{position:fixed;top:-99px}.-ol{margin-top:-52px;margin-left:-25px}@media(min-width:768px){.-ol{display:none}}.-ol .label-icon svg{transform:rotate(180deg)}.-ov{display:none}.-om{position:fixed;top:-99px}.-og{display:none}@media(min-width:768px)and (max-width:1440px){.-ov{display:inline-block}.-og{position:-webkit-sticky;position:sticky;top:138px;display:inline-flex;transform:translate(-40px,-52px)}.-om:checked~.-oy{grid-column:1/2}.-om:checked~.-oy nav{display:none}.-om:checked~.-oy svg{transform:rotate(180deg)}}@media(min-width:768px)and (max-width:1440px)and (max-width:1023px){.-om:checked~.ap--toc{grid-column:2/25}}@media(min-width:768px)and (max-width:1440px){.-om:checked~.ap--toc~.-t{padding-left:80px;padding-right:80px;grid-column:2/20}}@media(min-width:768px)and (max-width:1440px)and (max-width:1023px){.-om:checked~.ap--toc~.-t{grid-column:2/25}}@media(min-width:768px)and (max-width:1440px){.-om:checked~.-t,.-om:checked~.ap--help{grid-column-start:2;padding-left:80px;padding-right:80px}.-om:checked~.-t .-og,.-om:checked~.ap--help .-og{margin-left:-88px}.-om:checked~.-t .-og .label-icon svg,.-om:checked~.ap--help .-og .label-icon svg{transform:rotate(180deg)}}.ap-o-burger-menu{display:none;position:fixed;top:0;left:0;width:100vw;height:100vh;padding:110px 20px 80px;z-index:16;background-color:#fff}@media(max-width:240px){.ap-o-burger-menu{padding:37px 20px 0}.has-banner~.ap-o-burger-menu{padding:calc(37px + 31px) 0 0 20px}}.ap-o-burger-menu-label{position:fixed;z-index:1001;top:12px;right:20px;cursor:pointer}.ap-o-burger-menu-label.mainmenuopen{z-index:1004}.has-banner+.ap-o-burger-menu-label{top:calc(12px + 31px)}.amp-hidden+.has-banner+.ap-o-burger-menu-label,amp-user-notification[hidden]+.has-banner+.ap-o-burger-menu-label{top:12px}@media(min-width:768px){.ap-o-burger-menu-label{right:30px}}@media(min-width:1024px){.ap-o-burger-menu-label{display:none}}.ap-o-burger-menu-icon{width:30px;height:30px}@media(min-width:1024px){.ap-o-burger-menu{display:none}}.ap-o-burger-menu.mainmenuopen{display:block;z-index:1003}.ap-o-burger-menu.mainmenuopen~.ap--main{max-height:calc(100vh - 55px)}.has-banner+.ap-o-burger-menu.mainmenuopen~.ap--main{max-height:calc(100vh - 55px - 31px)}.ap-o-burger-menu.mainmenuopen~.ap--footer{display:none}.-th{list-style:none;display:flex;flex-direction:column;height:100%;margin:1rem 0 0;padding:0;overflow-y:auto;-webkit-overflow-scrolling:touch}@media(max-width:240px){.-th{padding:1rem 0}}.-th .-th{margin-top:1rem}.-th .-th .-tp:last-child{margin-bottom:0}.-tp{margin-bottom:1rem;position:relative}.-tp:last-child{margin-top:auto}.-tp ul{display:none}.-td{position:absolute;left:0;top:0;width:100%;height:36px;padding:0;margin:0;background:none transparent;border:none;cursor:pointer;-webkit-appearance:none}.-td:focus{outline:5px auto -webkit-focus-ring-color}.-td:checked~ul{display:block}.-td:checked+.nav-icon .ap-a-ico{transform:rotate(0)}.-td+.nav-icon .ap-a-ico{display:inline-block;transform:rotate(-90deg)}.-tp .ap-a-ico{height:.6em;margin-bottom:.3em;margin-left:.3em;width:.6em}.-tv{position:relative;margin-right:20px;padding-bottom:10px;display:none}@media(max-width:240px){.-tv{margin-right:0}}@media(min-width:1024px){.-tv{margin-right:0;padding-right:30px;display:block}}.-tm{display:flex;align-items:center;font-size:11px;border:none;background:0 0}.-tm:hover{color:#005af0}.-tg{position:absolute;left:0;top:0;width:100%;height:100%;margin:0;padding:0;border:0;-webkit-appearance:none}@media(min-width:1024px){.-tg{width:calc(100% - 30px)}}.-ty{width:10px;height:10px;margin-left:5px}.-tb{list-style:none;display:none;position:absolute;right:15%;margin:0;padding:2px 8px;background:#fff;box-shadow:0 2px 10px 0 rgba(0,0,0,.07)}@media(max-width:240px){.-tb{overflow:auto;max-height:calc(100vh - 55px - 31px)}}.-tb:hover,.-tg:checked~.-tb,.-tg:hover~.-tb,.-tv .-tw{display:block}.-tb:focus-within{display:block}.mainmenuopen .-tv{display:block}.-tw{font-family:Poppins,system;font-weight:700;font-size:1.5em;color:#000}@media(min-width:1024px){.-tw{font-size:1rem}}.-tx{line-height:1.6rem;font-weight:400;color:#48525c;font-size:1rem}@media(min-width:1024px){.-tx{font-size:.875rem}}.-tx.active{text-decoration:underline}.-tw:hover{color:#005af0}.-tw.active{font-weight:700;color:#005af0}.ap--header{width:100%;max-width:2020px;margin:0 auto;position:-webkit-sticky;position:sticky;top:0;z-index:1001;background-color:#fff;box-shadow:0 2px 10px 0 rgba(0,0,0,.07)}.ap--header.mainmenuopen{z-index:1004}.ap--header.mainmenuopen~.ap--main{max-width:100vw;overflow-x:hidden}@media(min-width:1024px){.ap--header{top:0}.ap--header.has-banner{top:-31px}}.ap-o-header{display:flex;flex-direction:row;flex-wrap:nowrap;align-items:center;max-width:1460px;padding:10px 0 0 20px;margin:0 auto}@media(min-width:1024px){.ap-o-header{display:flex;padding-left:30px}}.ap-o-header-home{position:-webkit-sticky;position:sticky;top:10px;display:flex;align-items:center;margin-right:auto;padding-bottom:10px;overflow:hidden}.ap-o-header-home-logo{height:30px;margin-right:6px;width:30px}.ap-o-header-home-sub-title,.ap-o-header-home-title{margin-left:4px;font-family:Poppins,system;font-weight:700;font-size:1.5em;color:#005af0}@media(min-width:1024px){.ap-o-header-home-sub-title,.ap-o-header-home-title{font-size:1.125rem}}.ap-o-header-home-sub-title{color:#000;white-space:nowrap;text-overflow:ellipsis;overflow:hidden}.ap-o-header-main{display:none;flex:1 1 auto;padding:0 30px}@media(min-width:1024px){.ap-o-header-main{display:flex}}.ap-o-header-main-item{position:relative;display:flex;align-items:center;margin:0 18px -5px}.ap-o-header-main-link{display:flex;align-items:center;padding:0 0 14px;border:0;background:0 0}.ap-o-header-main-link-icon{font-size:8px;margin-left:5px;transform:rotate(0);transition:transform .2s ease}.ap-o-header-flyout:hover,.ap-o-header-main-link:focus~.ap-o-header-flyout,.ap-o-header-main-link:hover~.ap-o-header-flyout{opacity:1;pointer-events:all;transition:opacity .2s ease}.ap-o-header-flyout:focus-within{opacity:1;pointer-events:all;transition:opacity .2s ease}.ap-o-header-flyout{box-shadow:0 10px 25px 0 rgba(0,0,0,.2);position:absolute;top:95%;left:0;margin:0;padding:0 0 10px;pointer-events:none;opacity:0;list-style:none;background:#fff;border-radius:0 0 4px 4px;transition:opacity .2s ease}.ap-o-header-flyout:before{content:"";display:block;background:linear-gradient(180deg,rgba(0,0,0,.07) 0,hsla(0,0%,100%,.07));height:8px;margin-bottom:10px}.ap-o-header-flyout-item-secondary{margin:20px 0;white-space:nowrap;min-width:200px}.ap-o-header-flyout-item-secondary a:hover{color:#005af0}.ap-o-header-flyout-item-title{line-height:1.6rem;font-weight:400;color:#48525c;font-size:.875rem;font-family:Poppins,system;font-weight:700;color:#000;line-height:1.4em}.ap-o-header-flyout-item-title.secondary{padding:0 15px}.ap-o-header-flyout-item-description{line-height:1.6rem;font-weight:400;color:#48525c;font-size:.8125rem;opacity:.75;line-height:1.25em}.ap-o-header-flyout-primary-item{position:relative;width:300px}.ap-o-header-flyout-primary-item:hover .ap-o-header-flyout-primary-item-link{box-shadow:0 10px 25px 0 rgba(0,0,0,.2);background-color:#005af0}.ap-o-header-flyout-primary-item:hover .ap-o-header-flyout-primary-item-link-info>*{color:#fff}.ap-o-header-flyout-primary-item:hover .ap-o-header-flyout-primary-item-link-info-stories .ap-o-header-flyout-item-description,.ap-o-header-flyout-primary-item:hover .ap-o-header-flyout-primary-item-link-info-stories .ap-o-header-flyout-item-title{color:#20202a}.ap-o-header-flyout-primary-item:hover .ap-o-header-flyout-primary-item-link-info-email .ap-o-header-flyout-item-description,.ap-o-header-flyout-primary-item:hover .ap-o-header-flyout-primary-item-link-info-email .ap-o-header-flyout-item-title{color:#20202a}.ap-o-header-flyout-primary-item:hover .ap-o-header-flyout-primary-item-link-icon{fill:#fff}.ap-o-header-flyout-primary-item:hover .ap-o-header-flyout-primary-item-link-icon.email,.ap-o-header-flyout-primary-item:hover .ap-o-header-flyout-primary-item-link-icon.stories{fill:#20202a}.ap-o-header-flyout-primary-item:hover .ap-o-header-flyout-primary-item-link.websites{background:linear-gradient(225deg,#00dcc0,#005af0 75%)}.ap-o-header-flyout-primary-item:hover .ap-o-header-flyout-primary-item-link.stories{background:linear-gradient(225deg,#ec6600,#ffdc00 75%)}.ap-o-header-flyout-primary-item:hover .ap-o-header-flyout-primary-item-link.ads{background:linear-gradient(225deg,#eb49e1,#5500d7 75%)}.ap-o-header-flyout-primary-item:hover .ap-o-header-flyout-primary-item-link.email{background:linear-gradient(225deg,#09a600,#e1eb64 75%)}.ap-o-header-flyout-primary-item-link{display:flex;align-items:center;border-radius:4px;padding:10px;margin:0 5px}.ap-o-header-flyout-primary-item-link-info{margin:0 20px 0 15px}.ap-o-header-flyout-primary-item-link-icon{display:flex;font-size:medium;box-sizing:initial;justify-content:center;width:2em;height:2em}.ap-o-header-flyout-primary-item-link-icon.websites{fill:url(#gradient-websites) #000}.ap-o-header-flyout-primary-item-link-icon.stories{fill:url(#gradient-stories) #000}.ap-o-header-flyout-primary-item-link-icon.ads{fill:url(#gradient-ads) #000}.ap-o-header-flyout-primary-item-link-icon.email{fill:url(#gradient-email) #000}#blm-banner{background:#111;color:#eee;display:block;text-align:center;padding:.5em}.ap--main>.-tf:first-child{padding-top:54px;padding-bottom:3rem}body{background-color:#fafafc}.-ao .-tf{position:relative;display:flex;flex-wrap:wrap;width:100%;max-width:1440px;padding:0 20px;margin-left:auto;margin-right:auto}@media(max-width:767px){.-ao .-tf{padding:0 15px}.-ao .-tf>div,.-ao .-tf section{min-width:0}}@media(min-width:768px){.-ao .-tf{display:grid;grid-gap:30px;grid-template-columns:repeat(24,minmax(0,1fr));padding:0 30px;grid-gap:0}}@media(min-width:1024px){.-ao .-tf{padding:0 15px}}.-ao .-t,.-ao .ap--help{grid-column:1;position:relative;width:100%;background:#fafafc}@media(min-width:768px){.-ao .-t,.-ao .ap--help{grid-column:9/25}}@media(min-width:1024px){.-ao .-t,.-ao .ap--help{grid-column:7/25}.-ao .-t p.limit,.-ao .ap--help p.limit{max-width:70%}}@media(min-width:768px){.-ao .-t,.-ao .ap--help{grid-column:8/25;padding-left:30px;padding-right:30px;padding-bottom:60px}}@media(min-width:1024px){.-ao .-t,.-ao .ap--help{grid-column:6/24;padding-left:30px;padding-bottom:60px}}.-ao .-oy{grid-column:auto;padding:0}@media(min-width:768px){.-ao .-oy{grid-column:1/8;grid-row:span 6;margin-right:20px}}@media(min-width:1024px){.-ao .-oy{grid-column:1/6}}.-ao .ap--toc{box-shadow:20px 25px 40px 0 rgba(0,0,0,.05)}.-ao .ap--toc~.-t{box-shadow:-30px -5px 30px -20px rgba(0,0,0,.05)}@media(min-width:768px){.-ao .ap--toc{grid-column:8/25}.-ao .ap--toc~.-t{padding-top:0}}@media(min-width:768px)and (min-width:768px){.-ao .ap--toc~.-t{grid-column:8/25;padding-left:30px}}@media(min-width:768px)and (min-width:1024px){.-ao .ap--toc~.-t{grid-column:6/20;padding-left:30px;padding-right:30px}}@media(min-width:768px)and (min-width:768px){.-ao .ap--toc~.ap--help~.-t{grid-column-end:25}}@media(min-width:768px)and (min-width:1024px){.-ao .ap--toc~.ap--help~.-t{grid-column-end:25}}@media(min-width:1024px){.-ao .ap--toc{background:#fafafc;grid-column:20/25;grid-row:span 3;padding-top:93px;padding-bottom:25px}.-ao .ap--toc~.-t{padding-top:62px}}@media(min-width:1024px)and (max-width:767px){.-ao .ap--toc~.-t{padding-left:15px;padding-right:15px}}.-ao .-oy+.-t,.-ao .ap--toc+.-t{padding-top:62px}@media(max-width:767px){.-ao .-oy+.-t,.-ao .ap--toc+.-t{padding-left:15px;padding-right:15px}}@media(min-width:1024px){.-ao .-oy+.-t:nth-of-type(2),.-ao .-oy+.-t:nth-of-type(3),.-ao .ap--toc+.-t:nth-of-type(2),.-ao .ap--toc+.-t:nth-of-type(3){grid-row:1}}@media(max-width:767px){.-ao .-oy~.-t,.-ao .ap--toc~.-t{padding-left:15px;padding-right:15px}}.-ao .-t amp-anim{box-shadow:0 30px 30px -15px rgba(0,0,0,.25)}@media screen and (max-width:575px){.-ao .-t figure{min-width:50vw}}.-ao .-t figure.alignment-wrapper{margin-top:1.6rem}.-ao .-t figure.left{text-align:left}.-ao .-t figure.center{text-align:center}.-ao .-t figure.right{text-align:right}@media(min-width:768px){.-ao .-t figure.half amp-img{width:50%}}.-ao .-t figure.third amp-img{width:50%}@media(min-width:768px){.-ao .-t figure.third amp-img{width:33%}}.-ao .-t figure.shadow amp-img{box-shadow:0 30px 30px -15px rgba(0,0,0,.25)}.-ao .-t figure amp-img{margin:0 auto}.-ao .-t figure figcaption{line-height:1.6rem;font-weight:400;color:#48525c;font-size:.8125rem;padding-top:20px;max-width:300px}.-ao .ap--chapter-indicator{display:flex;justify-content:space-between}.-ao .ap--chapter-indicator .ap-a-btn{margin:0 auto}.-ao .ap--chapter-indicator .ap--previous .-i{transform:scaleX(-1)}.-ao .ap--chapter-indicator .ap--next{justify-self:flex-end}.-ao .ap--chapter-indicator .ap--next .-i{margin-left:.625em;margin-right:0}.-ao .noshowtoc{display:none}.-ta{display:flex;overflow-x:auto;margin:1.1rem 0 0;padding:0 1em;color:#fff;line-height:1.3em;background:#20202a;font-size:.9em}.-ta:after{content:" ";-moz-user-select:none;-webkit-user-select:none;-ms-user-select:none;user-select:none}.-ta::-webkit-scrollbar{width:6px;height:6px}.-ta::-webkit-scrollbar-thumb{border-radius:3px;background-color:#91979d}.-ta::-webkit-scrollbar-corner{background-color:transparent}.-ta::-webkit-scrollbar-thumb{border-radius:0}@media(min-width:768px){.-ta{max-width:100%;margin-right:-30px}}.-ta code,.-ta pre{font-family:Fira Mono,monospace;font-weight:500;white-space:pre;font-size:.9rem;padding:unset;word-break:normal;color:inherit;background:0 0}.-ta .hll{background-color:#49483e}.-ta .c{color:#75715e}.-ta .k{color:#66d9ef}.-ta .l{color:#ae81ff}.-ta .n{color:#f8f8f2}.-ta .o{color:#f15a5a}.-ta .p{color:#f8f8f2}.-ta .c1,.-ta .ch,.-ta .cm,.-ta .cp,.-ta .cpf,.-ta .cs{color:#75715e}.-ta .gd{color:#f15a5a}.-ta .ge{font-style:italic}.-ta .gi{color:#a6e22e}.-ta .gs{font-weight:700}.-ta .gu{color:#75715e}.-ta .kc,.-ta .kd{color:#66d9ef}.-ta .kn{color:#f15a5a}.-ta .kp,.-ta .kr,.-ta .kt{color:#66d9ef}.-ta .ld{color:#e6db74}.-ta .m{color:#ae81ff}.-ta .s{color:#e6db74}.-ta .na{color:#a6e22e}.-ta .nb{color:#f8f8f2}.-ta .nc{color:#a6e22e}.-ta .no{color:#66d9ef}.-ta .nd{color:#a6e22e}.-ta .ni{color:#f8f8f2}.-ta .ne,.-ta .nf{color:#a6e22e}.-ta .nl,.-ta .nn{color:#f8f8f2}.-ta .nx{color:#fff}.-ta .py{color:#f8f8f2}.-ta .nt{color:#f15a5a}.-ta .nv{color:#f8f8f2}.-ta .ow{color:#f15a5a}.-ta .w{color:#f8f8f2}.-ta .mb,.-ta .mf,.-ta .mh,.-ta .mi,.-ta .mo{color:#ae81ff}.-ta .dl,.-ta .s2,.-ta .sa,.-ta .sb,.-ta .sc,.-ta .sd{color:#e6db74}.-ta .se{color:#ae81ff}.-ta .s1,.-ta .sh,.-ta .si,.-ta .sr,.-ta .ss,.-ta .sx{color:#e6db74}.-ta .bp{color:#f8f8f2}.-ta .fm{color:#a6e22e}.-ta .vc,.-ta .vg,.-ta .vi,.-ta .vm{color:#f8f8f2}.-ta .il{color:#ae81ff}table{table-layout:fixed;width:100%;position:relative;border-collapse:collapse;padding:0 0 0 20px;margin:1.5em -20px 2em;display:block;overflow-x:auto;-webkit-overflow-scrolling:touch;line-height:1.6rem;font-weight:400;color:#48525c;font-size:.875rem}@media(min-width:768px){table{padding:0;margin:1.5em 0 2em}}thead{font-weight:700}thead tr{text-align:left}thead tr th{padding:20px}tbody tr,thead tr th{border-bottom:1px solid #e2e5e6}tbody tr:nth-child(odd){background-color:hsla(0,0%,100%,.5)}tbody tr td:first-child{border-right:1px solid #e2e5e6}tbody td{padding:10px 20px;text-align:left;vertical-align:top;width:50%}@media(min-width:768px){tbody td{padding:20px}}@media(min-width:1024px){tbody td{width:25%}}tbody td code{display:inline;padding:2px 4px;font-family:Fira Mono,monospace;font-weight:500;word-break:normal;color:#000;background-color:#e2e5e6;font-size:.9em;color:#005af0}</style><link rel="manifest" href="/manifest.json"></head><body class="ap--websites"> <svg style="position: absolute; width: 0; height: 0; overflow: hidden;" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"> <defs> <symbol id="close" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64"> <path d="M39.503 32l22.963-22.963c2.046-2.046 2.046-5.457 0-7.503s-5.456-2.046-7.503 0l-22.963 22.963-22.963-22.963c-2.046-2.046-5.457-2.046-7.503 0s-2.046 5.457 0 7.503l22.963 22.963-22.963 22.963c-2.046 2.046-2.046 5.456 0 7.503s5.457 2.046 7.503 0l22.963-22.963 22.963 22.963c2.046 2.046 5.456 2.046 7.503 0s2.046-5.456 0-7.503l-22.963-22.963z"/> </symbol><symbol id="stackoverflow" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 19 25"><path d="M14.2 14.7h1.6V25H0V14.7h1.6v8.6h12.5c.1-2.8.1-5.7.1-8.6zM9.5 3.2c1.8 2.7 3.6 5.4 5.4 8.2.6-.4 1.1-.8 1.7-1.2C14.8 7.5 13 4.8 11.2 2c-.5.5-1.1.8-1.7 1.2zm5.1 8.5c-2.8-1.7-5.5-3.3-8.2-5-.4.6-.7 1.2-1.1 1.8 2.7 1.7 5.5 3.3 8.2 5 .4-.6.8-1.2 1.1-1.8zM17.4 0c-.7.1-1.3.2-2 .4.5 3.2 1.1 6.5 1.6 9.7.7-.1 1.3-.2 2-.4-.5-3.2-1.1-6.5-1.6-9.7zm-4 14.1c-3.1-.9-6.2-1.7-9.2-2.6-.2.7-.4 1.4-.5 2 3.1.9 6.2 1.7 9.2 2.6.1-.6.3-1.3.5-2zm-.9 5.5H3v2.1h9.5v-2.1zm.3-2.7c-3.2-.3-6.3-.6-9.5-.9-.1.7-.1 1.4-.2 2.1 3.2.3 6.3.6 9.5.9 0-.8.1-1.4.2-2.1z"/></symbol><symbol id="github" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64"> <path d="M32 0.792c-17.68 0-32 14.328-32 32 0 14.141 9.168 26.133 21.88 30.36 1.6 0.301 2.187-0.688 2.187-1.539 0-0.76-0.027-2.773-0.040-5.44-8.901 1.931-10.779-4.293-10.779-4.293-1.456-3.693-3.56-4.68-3.56-4.68-2.899-1.984 0.224-1.944 0.224-1.944 3.213 0.224 4.901 3.296 4.901 3.296 2.853 4.893 7.491 3.48 9.32 2.661 0.288-2.069 1.112-3.48 2.027-4.28-7.107-0.8-14.576-3.552-14.576-15.813 0-3.493 1.24-6.347 3.293-8.587-0.36-0.808-1.44-4.061 0.28-8.469 0 0 2.68-0.859 8.8 3.28 2.56-0.712 5.28-1.064 8-1.080 2.72 0.016 5.44 0.368 8 1.080 6.080-4.139 8.76-3.28 8.76-3.28 1.72 4.408 0.64 7.661 0.32 8.469 2.040 2.24 3.28 5.093 3.28 8.587 0 12.293-7.48 15-14.6 15.787 1.12 0.96 2.16 2.923 2.16 5.92 0 4.283-0.040 7.723-0.040 8.763 0 0.84 0.56 1.84 2.2 1.52 12.803-4.197 21.963-16.197 21.963-30.317 0-17.672-14.328-32-32-32z"/> </symbol><symbol id="wordpress" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64"><path d="M57.251 18.2A28.688 28.688 0 0 1 60.766 32c0 10.611-5.749 19.883-14.301 24.867l8.787-25.405c1.64-4.107 2.187-7.389 2.187-10.304 0-1.08-.069-2.08-.187-2.96zm-21.283.277c1.725-.08 3.285-.28 3.285-.28 1.552-.2 1.371-2.48-.179-2.397 0 0-4.68.36-7.68.36-2.837 0-7.6-.4-7.6-.4-1.56-.08-1.763 2.28-.2 2.36 0 0 1.44.163 3 .24l4.48 12.28-6.32 18.88L14.277 18.4c1.731-.08 3.291-.267 3.291-.267 1.56-.2 1.376-2.48-.173-2.389 0 0-4.656.368-7.664.368-.533 0-1.168-.021-1.84-.04C13.096 8.4 21.96 3.24 32 3.24a28.642 28.642 0 0 1 19.429 7.555c-.123-.008-.243-.024-.376-.024-2.827 0-4.832 2.461-4.832 5.104 0 2.373 1.368 4.381 2.827 6.749 1.096 1.92 2.373 4.381 2.373 7.939 0 2.44-.944 5.317-2.189 9.277l-2.867 9.56-10.4-30.96.003.037zM32 60.757c-2.824 0-5.549-.408-8.128-1.165l8.632-25.083 8.84 24.232c.064.141.133.269.208.397A28.794 28.794 0 0 1 32 60.762zM3.229 32c0-4.171.896-8.133 2.493-11.707L19.439 57.89C9.85 53.226 3.231 43.389 3.228 31.999zM32 0C14.36 0 0 14.36 0 32s14.36 32 32 32 32-14.36 32-32S49.64 0 32 0z"/></symbol><symbol id="youtube" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64"><path d="M62.664 16.542c-.773-2.708-2.862-4.797-5.514-5.556l-.057-.014c-4.989-1.336-25.065-1.336-25.065-1.336s-20.026-.027-25.065 1.337c-2.708.773-4.797 2.862-5.556 5.514l-.014.057C.507 21.107 0 26.354 0 31.72l.001.327v-.017.252a83.84 83.84 0 0 0 1.475 15.695l-.083-.521c.773 2.708 2.862 4.797 5.513 5.556l.057.014c4.983 1.339 25.065 1.339 25.065 1.339s20.023 0 25.065-1.339c2.708-.773 4.797-2.862 5.556-5.514l.014-.057c.85-4.469 1.336-9.609 1.336-14.863l-.002-.595v.03c.002-.184.002-.403.002-.621 0-5.255-.486-10.396-1.416-15.38l.08.515zM25.621 41.608V22.42l16.71 9.609z"/></symbol><symbol id="twitter" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64"> <path d="M63.875 12.186c-2.36 1.037-4.88 1.744-7.533 2.067 2.704-1.629 4.784-4.197 5.768-7.261-2.536 1.48-5.346 2.557-8.338 3.157-2.389-2.557-5.794-4.157-9.576-4.157-7.245 0-13.119 5.874-13.119 13.111 0 1.040 0.12 2.040 0.339 2.997-10.906-0.515-20.572-5.752-27.042-13.669-1.139 1.925-1.776 4.162-1.776 6.6 0 4.56 2.32 8.568 5.834 10.922-2.152-0.069-4.176-0.661-5.941-1.643v0.163c0 6.36 4.514 11.663 10.522 12.871-1.101 0.296-2.264 0.456-3.456 0.456-0.837 0-1.64-0.080-2.443-0.229 1.683 5.208 6.52 9.005 12.277 9.112-4.48 3.517-10.157 5.613-16.271 5.613-1.040 0-2.077-0.061-3.12-0.179 5.837 3.717 12.714 5.89 20.151 5.89 24.143 0 37.329-19.989 37.329-37.294 0-0.557 0-1.12-0.040-1.68 2.563-1.837 4.8-4.16 6.56-6.794l-0.125-0.053z"/> </symbol><symbol id="download" viewBox="0 0 64 64"> <path d="M8.8 62.32c0-0.88 0.72-1.68 1.68-1.68 10.8 0 32.32 0 43.040 0 0.88 0 1.68 0.72 1.68 1.68 0 0.88-0.72 1.68-1.68 1.68-10.8 0-32.32 0-43.040 0-0.96 0-1.68-0.72-1.68-1.68z"/> <path d="M49.44 34.56c0.72-0.72 0.72-1.84 0-2.56s-1.84-0.72-2.56 0l-13.040 13.040v-43.28c0-0.96-0.88-1.76-1.84-1.76-1.040 0-1.84 0.8-1.84 1.76v43.28l-13.040-13.12c-0.72-0.72-1.84-0.72-2.56 0s-0.72 1.84 0 2.56l16.24 16.24c0.72 0.72 1.84 0.72 2.56 0l16.080-16.16z"/> </symbol><symbol id="angle-down-light" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64"> <path d="M0.662 19.607c-0.441-0.412-0.662-0.927-0.662-1.494s0.221-1.082 0.662-1.494c0.883-0.825 2.317-0.825 3.2 0l28.138 26.28 28.138-26.28c0.883-0.825 2.317-0.825 3.2 0s0.883 2.164 0 2.989l-29.738 27.775c-0.883 0.825-2.317 0.825-3.2 0l-29.738-27.775z"/> </symbol><symbol id="tutorial" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 16"><path fill="#005af0" d="M19.5 1.8h-1.4V.5c0-.1 0-.2-.1-.3-.1-.1-.2-.1-.3-.1h-5.9c-.7 0-1.4.3-1.8.9C9.6.4 8.9.1 8.2.1H2.3c-.1 0-.2 0-.3.1-.1.1-.1.2-.1.3v1.3H.5c-.1 0-.2 0-.3.1-.1.1-.1.2-.1.3v10.7c0 .1 0 .2.1.3s.2.1.3.1H5c2.5 0 3.3.7 4.6 2.5.1.1.2.2.4.2s.3-.1.4-.2c1.4-1.8 2.2-2.5 3.7-2.5h5.5c.1 0 .2 0 .3-.1s.1-.2.1-.3V2.2c0-.1 0-.2-.1-.3-.1-.1-.2-.1-.4-.1zM11.8.9h5.5v9.8h-5c-.7 0-1.3.3-1.8.8V2.2c0-.7.6-1.3 1.3-1.3zM2.7.9h5.5c.8 0 1.4.6 1.4 1.3v9.3c-.5-.5-1.1-.9-1.8-.9h-5V.9zm16.4 11.5h-5c-1.9 0-2.9.9-4.1 2.4-1.2-1.5-2.3-2.4-5-2.4H.9V2.6h.9V11c0 .1 0 .2.1.3s.2.1.3.1h5.5c.7 0 1.5.8 1.9 1.5.1.2.2.2.4.2h.1c.1 0 .2-.1.3-.2.4-.7 1.1-1.5 1.9-1.5h5.5c.1 0 .2 0 .3-.1s.1-.2.1-.3V2.6h.9v9.8zm-5.6-8.5c-.3 0-.5-.2-.5-.4s.2-.4.5-.4.5.2.5.4c-.1.2-.3.4-.5.4zm0 4.7c-.1 0-.2 0-.3-.1s-.1-.2-.1-.3V5.5c0-.2.2-.4.5-.4s.5.2.5.4v2.7c0 .1 0 .2-.1.3s-.4.1-.5.1zm-9-3.7c-.3 0-.5-.2-.5-.4s.2-.4.5-.4h3.2c.3 0 .5.2.5.4s-.2.4-.5.4H4.5zm0 2c-.3 0-.5-.2-.5-.4s.2-.4.5-.4h3.2c.3 0 .5.2.5.4s-.2.4-.5.4H4.5zm0 2c-.3 0-.5-.2-.5-.4s.2-.4.5-.4h3.2c.3 0 .5.2.5.4s-.2.4-.5.4H4.5z"/></symbol><symbol id="internal" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64"><path d="M43.16 10.18c-0.881-0.881-2.322-0.881-3.203 0s-0.881 2.322 0 3.203l16.335 16.335h-54.051c-1.281 0-2.242 1.041-2.242 2.242 0 1.281 0.961 2.322 2.242 2.322h54.051l-16.415 16.335c-0.881 0.881-0.881 2.322 0 3.203s2.322 0.881 3.203 0l20.259-20.259c0.881-0.881 0.881-2.322 0-3.203l-20.179-20.179z"/></symbol><symbol id="bookmark" viewBox="0 0 27 40"><g fill="none"><path stroke="#005AF0" stroke-width="2" d="M20.598 1H6.402c-1.497 0-2.856.568-3.84 1.492C1.602 3.394 1 4.638 1 6.014V38.05l12.588-8.756L26 38.069V6.014c0-1.376-.601-2.62-1.562-3.522C23.454 1.568 22.095 1 20.598 1z"/><path fill="#005AF0" d="M12.121 25.21h-1.14l1.127-6.824-3.49.005-.049.001c-.314 0-.569-.255-.569-.57 0-.134.126-.362.126-.362L14.398 7l1.159.005-1.156 6.834 3.509-.004.055-.001c.315 0 .57.254.57.569 0 .127-.05.24-.122.335L12.121 25.21z"/></g></symbol><symbol id="warning-sign" viewBox="0 0 38 38"><g fill="none" fill-rule="evenodd"><path stroke="#F3C000" stroke-width="2" d="M19.843 2.29l16.643 33.671c.177.356.03.788-.326.964-.1.05-.208.075-.319.075H2.171c-.398 0-.72-.322-.72-.72 0-.113.026-.224.077-.325l17.028-33.67c.179-.355.612-.497.967-.318.139.07.251.184.32.324z"/><path fill="#F3C000" fill-rule="nonzero" d="M17.621 32.71h-1.14l1.127-6.824-3.49.005-.049.001c-.314 0-.569-.255-.569-.57 0-.134.126-.362.126-.362l6.272-10.46 1.159.005-1.156 6.834 3.509-.004.055-.001c.315 0 .57.254.57.569 0 .127-.05.24-.122.335L17.621 32.71z"/></g></symbol><symbol id="speech-bubble" viewBox="0 0 38 38"><g fill="none" fill-rule="evenodd"><path stroke="#005AF0" stroke-width="1.94" d="M1.544 19.002c0 9.64 7.816 17.457 17.457 17.457 3.707 0 6.783-.838 9.61-2.809.936-.653 7.057 3.628 7.848 2.809.71-.737-3.264-7.394-2.69-8.247 1.868-2.78 2.69-5.61 2.69-9.21C36.459 9.36 28.642 1.544 19 1.544c-9.639 0-17.456 7.817-17.456 17.458z"/><path fill="#005AF0" fill-rule="nonzero" d="M17.621 28.71h-1.14l1.127-6.824-3.49.005-.049.001c-.314 0-.569-.255-.569-.57 0-.134.126-.362.126-.362l6.272-10.46 1.159.005-1.156 6.834 3.509-.004.055-.001c.315 0 .57.254.57.569 0 .127-.05.24-.122.335L17.621 28.71z"/></g></symbol><symbol id="sidebar-toggle" viewBox="0 0 64 64"> <path d="M36.032 7.9c0.985-0.996 2.624-0.996 3.643 0 0.985 0.963 0.985 2.565 0 3.526l-18.471 18.060h40.246c1.421 0.002 2.55 1.107 2.55 2.496s-1.129 2.529-2.55 2.529h-40.246l18.471 18.026c0.985 0.996 0.985 2.601 0 3.562-1.019 0.996-2.66 0.996-3.643 0l-22.844-22.336c-1.019-0.963-1.019-2.565 0-3.526l22.844-22.338z"/> <path d="M2.071 3.012c1.144 0 2.071 0.927 2.071 2.071v53.835c0 1.144-0.927 2.071-2.071 2.071s-2.071-0.927-2.071-2.071v-53.835c0-1.144 0.927-2.071 2.071-2.071z"/> </symbol><symbol id="contentmenu" viewBox="0 0 64 64"> <path d="M1.351 46.865h36.036c0.746 0 1.351 0.605 1.351 1.351s-0.605 1.351-1.351 1.351h-36.036c-0.746 0-1.351-0.605-1.351-1.351s0.605-1.351 1.351-1.351zM1.351 14.432h40.541c0.746 0 1.351 0.605 1.351 1.351s-0.605 1.351-1.351 1.351h-40.541c-0.746 0-1.351-0.605-1.351-1.351s0.605-1.351 1.351-1.351zM1.351 38.757h31.532c0.746 0 1.351 0.605 1.351 1.351s-0.605 1.351-1.351 1.351h-31.532c-0.746 0-1.351-0.605-1.351-1.351s0.605-1.351 1.351-1.351zM1.351 30.649h37.838c0.746 0 1.351 0.605 1.351 1.351s-0.605 1.351-1.351 1.351h-37.838c-0.746 0-1.351-0.605-1.351-1.351s0.605-1.351 1.351-1.351zM1.351 22.541h34.234c0.746 0 1.351 0.605 1.351 1.351s-0.605 1.351-1.351 1.351h-34.234c-0.746 0-1.351-0.605-1.351-1.351s0.605-1.351 1.351-1.351zM52.249 29.371c-0.992 0-1.231-0.566-0.525-1.272l5.296-5.296c0.353-0.353 0.931-0.348 1.279 0l5.296 5.296c0.702 0.702 0.466 1.272-0.525 1.272h-10.822zM63.069 35.153c0.992 0 1.231 0.566 0.525 1.272l-5.296 5.296c-0.353 0.353-0.931 0.348-1.279 0l-5.296-5.296c-0.702-0.702-0.466-1.272 0.525-1.272h10.822z"/> </symbol><symbol id="menu" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64"> <path d="M2.133 13.867h59.733c1.178 0 2.133 0.955 2.133 2.133v2.133c0 1.178-0.955 2.133-2.133 2.133h-59.733c-1.178 0-2.133-0.955-2.133-2.133v-2.133c0-1.178 0.955-2.133 2.133-2.133z"/> <path d="M2.133 28.8h59.733c1.178 0 2.133 0.955 2.133 2.133v2.133c0 1.178-0.955 2.133-2.133 2.133h-59.733c-1.178 0-2.133-0.955-2.133-2.133v-2.133c0-1.178 0.955-2.133 2.133-2.133z"/> <path d="M2.133 43.733h59.733c1.178 0 2.133 0.955 2.133 2.133v2.133c0 1.178-0.955 2.133-2.133 2.133h-59.733c-1.178 0-2.133-0.955-2.133-2.133v-2.133c0-1.178 0.955-2.133 2.133-2.133z"/> </symbol><symbol id="wrench" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64"> <path d="M64 18.267c0 1.608-0.214 3.21-0.636 4.767l0.008 0.169c0.028 0.598-0.186 1.18-0.592 1.619-2.713 7.035-9.527 11.712-17.107 11.712-1.852 0-3.671-0.275-5.427-0.819l-25.943 25.854c-1.573 1.567-3.667 2.431-5.889 2.431s-4.318-0.864-5.89-2.431l-0.087-0.087c-3.25-3.238-3.25-8.508 0-11.747l23.75-23.669c0.66-0.657 1.046-1.529 1.090-2.456l0.173-3.404c-0.070-0.657-0.105-1.308-0.105-1.939 0-10.074 8.221-18.267 18.327-18.267 3.298 0 6.532 0.883 9.353 2.555 0.602 0.357 1.005 0.979 1.083 1.675 0.011 0.098 0.017 0.161 0.020 0.237 0.044 1.158-0.297 1.536-9.858 10.586l3.847 3.921c1.149-1.058 3.185-2.929 8.997-8.27 0.542-0.497 1.293-0.697 2.010-0.534 0.719 0.163 1.311 0.668 1.583 1.351 0.856 2.147 1.291 4.418 1.292 6.745zM59.819 22.4c0.395-1.346 0.595-2.737 0.594-4.132 0-1.194-0.141-2.367-0.422-3.507-2.922 2.685-8.959 8.231-9.040 8.307-0.536 0.494-1.37 0.474-1.88-0.046l-6.953-7.087c-0.252-0.258-0.39-0.605-0.384-0.965s0.158-0.702 0.42-0.95c2.985-2.825 7.47-7.107 9.54-9.166-1.884-0.84-3.936-1.278-6.022-1.278-8.129 0-14.742 6.59-14.742 14.691 0 0.533 0.032 1.090 0.096 1.654 0.007 0.071 0.010 0.142 0.007 0.214l-0.174 3.646c-0.087 1.818-0.847 3.528-2.138 4.816l-23.75 23.668c-1.85 1.844-1.85 4.844 0 6.688l0.087 0.087c0.897 0.893 2.088 1.385 3.356 1.385s2.46-0.492 3.355-1.385l26.429-26.338c0.2-0.199 0.419-0.39 0.693-0.601 0.377-0.292 0.882-0.363 1.326-0.187 1.743 0.692 3.578 1.044 5.456 1.044 6.243 0 11.831-3.943 13.905-9.811 0.044-0.126 0.107-0.244 0.187-0.351-0.002-0.134 0.016-0.268 0.054-0.396z"/> </symbol><symbol id="template" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64"><path d="M1.44 0h62.56v64h-64v-64h1.44zM20.64 60.88v-39.52h-17.76v39.6h17.76zM23.44 21.36v39.6h37.44v-39.6h-37.44zM2.88 18.24h58.080v-15.36h-58.080v15.36z"/></symbol><symbol id="learn" viewBox="0 0 64 64"> <path d="M57.674 35.257c0 1.779 1.416 3.221 3.163 3.221s3.163-1.442 3.163-3.221c0-1.155-0.602-2.16-1.498-2.728v-8.973c0-0.682-0.401-1.297-1.018-1.563l-29.585-12.716c-0.413-0.178-0.881-0.178-1.295 0l-29.586 12.716c-0.617 0.265-1.018 0.881-1.018 1.563s0.401 1.297 1.018 1.562l6.662 2.863v17.587c0 4.624 7.288 9.29 23.571 9.29s23.571-4.666 23.571-9.29v-17.587l4.349-1.869v6.417c-0.896 0.569-1.497 1.573-1.497 2.728zM51.491 45.567c0 1.575-4.797 5.898-20.24 5.898s-20.24-4.323-20.24-5.898v-16.155l19.593 8.421c0.207 0.089 0.427 0.134 0.647 0.134s0.441-0.045 0.647-0.134l19.593-8.421v16.155zM31.251 34.43l-25.303-10.875 25.303-10.875 25.302 10.875-25.302 10.875z"/> </symbol><symbol id="examples-flyout" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 26 20"><g><path d="M20 19.3a.9.9 0 1 1 0-1.7 1.9 1.9 0 0 0 1.9-1.9v-3a3.6 3.6 0 0 1 1.3-2.7 3.6 3.6 0 0 1-1.3-2.8v-3A1.9 1.9 0 0 0 20 2.3a.9.9 0 1 1 0-1.7 3.6 3.6 0 0 1 3.6 3.6v3a1.9 1.9 0 0 0 2 2v1.6a1.9 1.9 0 0 0-2 2v3a3.6 3.6 0 0 1-3.6 3.5zm-14 0a3.6 3.6 0 0 1-3.6-3.6v-3a1.9 1.9 0 0 0-2-1.9V9.1a1.9 1.9 0 0 0 2-1.9v-3A3.6 3.6 0 0 1 6 .6a.9.9 0 1 1 0 1.8A1.9 1.9 0 0 0 4 4.2v3A3.6 3.6 0 0 1 2.8 10a3.6 3.6 0 0 1 1.3 2.7v3A1.9 1.9 0 0 0 6 17.6a.9.9 0 1 1 0 1.7z"/><g transform="translate(5.8 8.5)"><circle cx="12.3" cy="1.4" r="1.4"/><circle cx="7.3" cy="1.4" r="1.4"/><circle cx="2.2" cy="1.4" r="1.4"/></g></g></symbol><symbol id="components-flyout" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 28 22"><path d="M8.7 17l-2.5-2.2-4-3.5-.9-.8v1l2.5-2.2 4-3.5 1-.8c.2-.3.2-.8 0-1a.8.8 0 0 0-1.2 0L5.1 6l-4 3.6-.8.8c-.3.2-.3.8 0 1l2.5 2.2 4 3.6.8.8c.3.2.8.3 1.1 0 .3-.3.3-.8 0-1.1zM19.3 5l2.5 2.2 4 3.5.9.8v-1l-2.5 2.2-4 3.5-.9.8c-.3.3-.3.8 0 1 .3.4.8.3 1 0L23 16l4-3.6.9-.8c.3-.2.3-.8 0-1l-2.5-2.3-4-3.5-1-.8c-.2-.3-.7-.3-1 0-.3.3-.3.8 0 1zm-8 16.4l.7-2 1.6-5a3563.7 3563.7 0 0 1 2-5.8l1.7-5.1.8-2.5c.2-.4-.1-.9-.5-1a.8.8 0 0 0-1 .6c-.1.7-.4 1.3-.6 2l-1.6 4.9-2 5.9-1.7 5-.8 2.6c-.2.4.1.8.5 1a.8.8 0 0 0 1-.6z"/></symbol><symbol id="guides-documents" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 31 32"><path d="M6.7 28H1.2c-.4 0-.6-.4-.6-.8L.5.7c0-.4.3-.7.7-.7h21.1c.5 0 .7.3.7.7V2c0 .5-.2.7-.7.7-.4 0-.6-.2-.6-.7v-.6H1.8L2 26.6h4.8c.4 0 .7.2.7.6 0 .4-.3.7-.7.7z"/><path d="M8 6.8H6c-.4 0-.7-.3-.7-.7 0-.4.3-.7.7-.7h2c.5 0 .7.3.7.7 0 .4-.2.7-.7.7zM8 10.9H6c-.4 0-.7-.3-.7-.7 0-.4.3-.7.7-.7h2c.5 0 .7.3.7.7 0 .4-.2.7-.7.7zM8 15H6c-.4 0-.7-.3-.7-.7 0-.4.3-.7.7-.7h2c.5 0 .7.3.7.7 0 .4-.2.7-.7.7zM8 19H6c-.4 0-.7-.2-.7-.6 0-.4.3-.7.7-.7h2c.5 0 .7.3.7.7 0 .4-.2.7-.7.7z"/><path d="M29.8 4H8.7c-.5 0-.7.4-.7.8v26.5c0 .4.3.7.7.7h21.1c.4 0 .7-.3.7-.7V4.8c0-.4-.3-.7-.7-.7zm-.6 26.6H9.4V5.4h19.8v25.2z"/><path d="M18.1 22.8h-.6l.6-3.8h-1.9c-.2 0-.3-.1-.3-.3v-.2l3.4-5.8h.7l-.7 3.8h2c.2 0 .3.1.3.3v.2L18 22.8z"/></symbol><symbol id="start" viewBox="0 0 64 64"> <path d="M63.195 1.874c-0.143-0.52-0.549-0.926-1.069-1.069-10.765-2.978-20.385 2.978-24.355 6.948l-11.452 11.452-5.421-1.756c-3.551-1.163-7.454-0.217-10.078 2.443l-3.359 3.359c-0.582 0.594-0.582 1.544 0 2.138l7.329 7.329-4.199 6.948c-0.343 0.593-0.25 1.342 0.229 1.832l11.681 11.605c0.471 0.504 1.223 0.63 1.832 0.305l6.948-4.123h0.076l7.329 7.329c0.594 0.582 1.544 0.582 2.138 0l3.359-3.359c2.66-2.624 3.606-6.527 2.443-10.078l-1.756-5.421 11.452-11.452c3.894-4.047 9.849-13.666 6.871-24.431zM23.799 50.126l-9.925-9.925 3.13-5.268 12.063 12.063-5.268 3.13zM54.109 24.015l-12.139 12.139c-0.4 0.399-0.547 0.987-0.382 1.527l2.061 6.337c0.783 2.448 0.136 5.128-1.68 6.948l-2.29 2.29-29.012-29.012 2.29-2.29c1.819-1.815 4.5-2.463 6.948-1.68l6.337 2.061c0.54 0.165 1.128 0.018 1.527-0.382l12.216-12.063c3.436-3.359 11.452-8.398 20.461-6.337 2.061 9.085-2.978 17.102-6.337 20.461z"/> <path d="M10.667 51.195l-9.009 9.009c-0.478 0.358-0.703 0.963-0.576 1.547s0.583 1.040 1.167 1.167c0.584 0.127 1.188-0.098 1.547-0.576l9.009-9.009c0.456-0.608 0.396-1.459-0.142-1.996s-1.388-0.598-1.996-0.142z"/> <path d="M11.66 63.563c0.594 0.582 1.544 0.582 2.138 0l4.581-4.581c0.456-0.608 0.395-1.459-0.142-1.996s-1.388-0.598-1.996-0.142l-4.581 4.581c-0.582 0.594-0.582 1.544 0 2.138z"/> <path d="M1.505 52.798c0.403-0.006 0.787-0.17 1.069-0.458l4.581-4.581c0.478-0.358 0.703-0.963 0.576-1.547s-0.583-1.040-1.167-1.167c-0.584-0.127-1.188 0.098-1.547 0.576l-4.581 4.581c-0.428 0.436-0.554 1.086-0.322 1.65s0.78 0.937 1.391 0.945z"/> <path d="M43.726 13.021c-2.003 2.003-2.003 5.25 0 7.253s5.25 2.003 7.253 0c2.003-2.003 2.003-5.25 0-7.253s-5.25-2.003-7.253 0zM48.841 18.136c-0.699 0.692-1.79 0.794-2.605 0.243s-1.127-1.601-0.745-2.508c0.382-0.907 1.351-1.417 2.315-1.219s1.653 1.050 1.646 2.033c-0.004 0.545-0.223 1.067-0.611 1.451z"/> </symbol><symbol id="amp-email" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64"> <defs> <linearGradient id="gradient-email" x1="76.2776137%" x2="20.8316146%" y1="-25.8400575%" y2="121.578822%"> <stop offset="0%" stop-color="#F1F068"/> <stop offset="46.2139774%" stop-color="#96D64F"/> <stop offset="100%" stop-color="#2DB932"/> </linearGradient> </defs> <path d="M64 14.080c0-3.291-2.56-5.851-5.851-5.851h-52.297c-3.291 0-5.851 2.56-5.851 5.851v35.84c0 3.291 2.56 5.851 5.851 5.851h52.297c3.291 0 5.851-2.56 5.851-5.851v-35.84zM5.851 11.154h52.297c0.183 0 0.366 0 0.549 0l-24.503 25.417c-0.549 0.549-1.28 0.914-2.194 0.914-0.731 0-1.646-0.366-2.194-0.914l-24.32-25.417c0 0 0.183 0 0.366 0zM2.926 14.080c0-0.366 0-0.731 0.183-1.097l15.36 16.091-15.543 19.2v-34.194zM58.149 52.846h-52.297c-0.731 0-1.646-0.366-2.194-0.914l16.823-20.663 7.131 7.497c1.097 1.097 2.56 1.829 4.206 1.829s3.109-0.731 4.206-1.829l6.583-6.949 17.371 20.114c-0.366 0.549-1.097 0.914-1.829 0.914v0zM61.074 48.274l-16.091-18.834 15.909-16.64c0.183 0.366 0.183 0.731 0.183 1.097v34.377z"/> </symbol><symbol id="amp-ads" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64"> <defs> <linearGradient id="gradient-ads" x1="100%" x2="14.5415777%" y1="0%" y2="123.368881%"> <stop offset="0%" stop-color="#FF52E1"/> <stop offset="100%" stop-color="#5500D7"/> </linearGradient> </defs> <path d="M56.399 14.68c3.654-3.846 9.616-10.963 6.924-13.847-2.885-2.885-10.001 3.269-13.847 6.731l-0.577-0.577c-0.385-0.385-0.962-0.577-1.539-0.385l-15.963 3.077c-0.385 0-0.577 0.192-0.769 0.385l-30.195 30.195c-0.577 0.577-0.577 1.731 0 2.308l20.963 20.963c0.385 0.385 0.769 0.385 1.154 0.385s0.769-0.192 1.154-0.385l30.003-30.003c0.192-0.192 0.385-0.577 0.385-0.769v0l3.077-15.963c0.192-0.577 0-1.154-0.385-1.539l-0.385-0.577zM53.899 16.988l-2.885 14.424-28.464 28.656-18.655-18.655 28.656-28.656 14.424-2.885c-1.539 1.731-4.039 4.423-5.962 7.116-1.923-0.192-3.654 0.385-5.193 1.923-2.5 2.5-2.5 6.731 0 9.232s6.731 2.5 9.232 0c1.346-1.346 2.116-3.27 1.923-5.193-0.192-1.154-0.577-2.308-1.154-3.077-0.192-0.385-0.385-0.577-0.769-0.769-0.192-0.192-0.577-0.577-0.769-0.769 1.154-1.731 2.885-3.654 5.193-5.962l2.5 2.5 1.923 2.116zM43.321 24.873c-0.192 0.385-0.385 0.577-0.577 0.962-1.346 1.346-3.27 1.346-4.616 0s-1.346-3.27 0-4.616c0.192-0.192 0.577-0.385 0.962-0.577 1.154-0.577 2.308-0.385 3.462 0.385 0.192 0 0.192 0.192 0.385 0.192 0 0 0.192 0.192 0.192 0.385 0.577 0.962 0.769 2.116 0.192 3.27zM54.091 12.372l-2.5-2.5c4.039-3.846 7.308-5.77 8.847-6.347-0.577 1.539-2.5 4.616-6.347 8.847z"/> </symbol><symbol id="amp-stories" viewBox="0 0 36 32"> <defs> <linearGradient id="gradient-stories" x1="81.726943%" x2="23.7165981%" y1="-28.3832685%" y2="119.978062%"> <stop offset="0%" stop-color="#FFF300"/> <stop offset="100%" stop-color="#FF8F00"/> </linearGradient> </defs> <path d="M7.111 0h21.333v32h-21.333v-32zM9.481 2.37v27.259h16.593v-27.259h-16.593zM0 4.741h2.37v22.519h-2.37v-22.519zM33.185 4.741h2.37v22.519h-2.37v-22.519z"/> </symbol><symbol id="amp-websites" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64"> <defs> <linearGradient id="gradient-websites" x1="81.8129399%" x2="33.8766928%" y1="0%" y2="94.4849088%"> <stop offset="0%" stop-color="#00DCC0"/> <stop offset="100%" stop-color="#005AF0"/> </linearGradient> </defs> <path d="M63.196 4.646h-62.253c-0.566 0-0.943 0.377-0.943 0.755v53.010c0 0.566 0.377 0.943 0.943 0.943h62.253c0.566 0 0.755-0.377 0.755-0.755v-53.198c0.189-0.377-0.189-0.755-0.755-0.755zM3.395 18.040h57.348v33.202h-57.348v-33.202zM60.744 7.853v6.98h-57.348v-6.98h57.348zM3.395 56.147v-1.509h57.348v1.509h-57.348zM9.055 7.853c1.132 0 1.886 0.754 1.886 1.886s-0.755 1.886-1.886 1.886-1.886-0.755-1.886-1.886 0.943-1.886 1.886-1.886zM12.828 7.853c1.132 0 1.886 0.754 1.886 1.886s-0.755 1.886-1.886 1.886-1.886-0.755-1.886-1.886 0.943-1.886 1.886-1.886zM18.487 7.853c1.132 0 1.886 0.754 1.886 1.886s-0.755 1.886-1.886 1.886-1.886-0.755-1.886-1.886 0.943-1.886 1.886-1.886zM51.123 39.734l-11.13-13.96c-0.189-0.189-0.377-0.377-0.755-0.377v0c-0.189 0-0.566 0-0.755 0.377l-8.3 9.621-4.716-6.225c-0.189-0.189-0.377-0.377-0.755-0.377s-0.566 0-0.755 0.377l-8.866 10.376c-0.377 0.377-0.189 0.943 0 1.132s0.377 0.189 0.566 0.189c0.189 0 0.566 0 0.754-0.377l8.3-9.621 4.528 5.471-2.452 3.018c-0.377 0.377-0.189 0.943 0 1.132 0.377 0.189 0.943 0.189 1.132 0l11.319-13.017 10.376 13.205c0.189 0.189 0.377 0.377 0.755 0.377 0.189 0 0.377 0 0.566-0.189 0.377-0.377 0.566-0.943 0.189-1.132zM27.165 26.718c1.509 0 2.641-1.132 2.641-2.641 0-1.321-1.132-2.641-2.641-2.641s-2.641 1.132-2.641 2.641c0 1.509 1.132 2.641 2.641 2.641zM27.165 23.322c0.566 0 0.943 0.377 0.943 0.943s-0.377 0.943-0.943 0.943-0.943-0.377-0.943-0.943c0-0.566 0.377-0.943 0.943-0.943z"/> </symbol><symbol id="angle-down-solid" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64"> <path d="M56.293 16.003c1.761-1.645 4.553-1.645 6.314 0 1.857 1.734 1.857 4.623 0 6.357l-27.45 25.638c-1.761 1.645-4.553 1.645-6.314 0l-27.45-25.638c-0.899-0.839-1.393-1.963-1.393-3.178s0.494-2.339 1.393-3.178c1.761-1.645 4.553-1.645 6.314 0l24.293 22.689 24.293-22.689z"/> </symbol><symbol id="logo" 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 & 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 & 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/guides-and-tutorials/start/converting/resolving-errors/" role="listitem">Deutsch</a> <a class="-tw" href="/fr/documentation/guides-and-tutorials/start/converting/resolving-errors/" role="listitem">Français</a> <a class="-tw" href="/ar/documentation/guides-and-tutorials/start/converting/resolving-errors/" role="listitem">العربية</a> <a class="-tw" href="/es/documentation/guides-and-tutorials/start/converting/resolving-errors/" role="listitem">Español</a> <a class="-tw" href="/it/documentation/guides-and-tutorials/start/converting/resolving-errors/" role="listitem">Italiano</a> <a class="-tw" href="/id/documentation/guides-and-tutorials/start/converting/resolving-errors/" role="listitem">Indonesia</a> <a class="-tw" href="/ja/documentation/guides-and-tutorials/start/converting/resolving-errors/" role="listitem">日本語</a> <a class="-tw" href="/ko/documentation/guides-and-tutorials/start/converting/resolving-errors/" role="listitem">한국어</a> <a class="-tw" href="/pt_br/documentation/guides-and-tutorials/start/converting/resolving-errors/" role="listitem">Português</a> <a class="-tw" href="/ru/documentation/guides-and-tutorials/start/converting/resolving-errors/" role="listitem">Русский</a> <a class="-tw" href="/tr/documentation/guides-and-tutorials/start/converting/resolving-errors/" role="listitem">Türkçe</a> <a class="-tw" href="/zh_cn/documentation/guides-and-tutorials/start/converting/resolving-errors/" role="listitem">中文</a> <a class="-tw" href="/pl/documentation/guides-and-tutorials/start/converting/resolving-errors/" role="listitem">Polski</a> <a class="-tw" href="/vi/documentation/guides-and-tutorials/start/converting/resolving-errors/" 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><main class="ap--main -ao"> <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="#include-charset">Include charset</a></li> <li><a href="#include-canonical-link">Include canonical link</a></li> <li><a href="#specify-the-amp-attribute">Specify the AMP attribute</a></li> <li><a href="#specify-a-viewport">Specify a viewport</a></li> <li><a href="#replace-external-stylesheets">Replace external stylesheets</a></li> <li><a href="#exclude-third-party-javascript">Exclude third-party JavaScript</a></li> <li><a href="#include-amp-css-boilerplate">Include AMP CSS boilerplate</a></li> <li><a href="#replace-<img>-with-<amp-img>">Replace <img> with <amp-img></a><ul> <li><a href="#amp-layout-system">AMP layout system</a></li> </ul> </li> <li><a href="#success!">Success!</a><ul> <li><a href="#frequently-asked-questions">Frequently asked questions</a></li> </ul> </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/guides-and-tutorials/">Guides & Tutorials</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> <div class="ap-m-breadcrumbs-crumb">Convert HTML to AMP</div> </nav> <h1>Resolving validation errors</h1> <p>In this section, we'll go through and resolve the AMP validation errors from our AMP page. Note that the errors may appear in a different order in your console.</p> <h2 id="include-charset">Include charset</h2> <p>We will begin by fixing the following error:</p> <pre class="error-text">The mandatory tag 'meta charset=utf-8' is missing or incorrect. </pre> <p>To correctly display text, AMP requires that you specify the charset for the page. The meta charset information must also be the first child of the <code><head></code> tag. The reason this tag must be first is to avoid re-interpreting content that was added before the meta charset tag.</p> <p><strong>Add</strong> the following code as the first line of the <code><head></code> tag:</p> <div class="-ta"><pre><span></span><code><span class="p"><</span><span class="nt">meta</span> <span class="na">charset</span><span class="o">=</span><span class="s">"utf-8"</span> <span class="p">/></span> </code></pre></div> <p><strong>Save</strong> the file and reload the page. Verify that the charset error no longer appears.</p> <h2 id="include-canonical-link">Include canonical link</h2> <p>Now, let's look at the following error:</p> <pre class="error-text">The mandatory tag 'link rel=canonical' is missing or incorrect. </pre> <p>Every AMP document needs to have a link referencing the "canonical" version of that document. We'll learn more about what canonical pages are and different approaches to canonical linking in the <a href="/documentation/guides-and-tutorials/start/converting/discoverable/">Making your page discoverable</a> step of this tutorial.</p> <p>For this tutorial we'll consider the original HTML article that we're converting to be the canonical page.</p> <p>Go ahead and <strong>add</strong> the following code below the <code><meta charset="utf-8" /></code> tag:</p> <div class="-ta"><pre><span></span><code><span class="p"><</span><span class="nt">link</span> <span class="na">rel</span><span class="o">=</span><span class="s">"canonical"</span> <span class="na">href</span><span class="o">=</span><span class="s">"/article.html"</span><span class="p">></span> </code></pre></div> <p> </p><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"/></svg> </div> <div class="ap-m-tip-content"> You can create a standalone canonical AMP page. The canonical link is still required, but should point to the AMP article itself:<p></p> <div class="-ta"><pre><span></span><code><span class="p"><</span><span class="nt">link</span> <span class="na">rel</span><span class="o">=</span><span class="s">"canonical"</span> <span class="na">href</span><span class="o">=</span><span class="s">"article.amp.html"</span><span class="p">></span> </code></pre></div> <p> </p></div> </div><p></p> <p>Now, <strong>reload</strong> the page. Although there are still plenty of errors to fix, the canonical link error is no longer present.</p> <h2 id="specify-the-amp-attribute">Specify the AMP attribute</h2> <p>AMP requires an attribute on the root <code><html></code> element of a page to declare the page as an AMP document.</p> <pre class="error-text">The mandatory attribute '⚡' is missing in tag 'html ⚡ for top-level html' The mandatory tag 'html ⚡ for top-level html' is missing or incorrect. </pre> <p>The above errors can be resolved by simply adding the <code>⚡</code>attribute to the <code><html></code> tag like so:</p> <div class="-ta"><pre><span></span><code><span class="p"><</span><span class="nt">html</span> <span class="err">⚡</span> <span class="na">lang</span><span class="o">=</span><span class="s">"en"</span><span class="p">></span> </code></pre></div> <p>Now, go ahead, reload the page and check that both errors are gone.</p> <p> </p><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"/></svg> </div> <div class="ap-m-tip-content"> Although specifying the <code>⚡</code> is the recommended approach, it's also possible to use the <code>amp</code> attribute in place of the <code>⚡</code> attribute, like so:<p></p> <div class="-ta"><pre><span></span><code><span class="p"><</span><span class="nt">html</span> <span class="na">amp</span> <span class="na">lang</span><span class="o">=</span><span class="s">"en"</span><span class="p">></span> </code></pre></div> <p> </p></div> </div><p></p> <h2 id="specify-a-viewport">Specify a viewport</h2> <p>Next, let's address the following error:</p> <pre class="error-text">The mandatory tag 'meta name=viewport' is missing or incorrect. </pre> <p>AMP requires the definition of a <code>width</code> and <code>minimum-scale</code> for the viewport. These values must be defined as <code>device-width</code> and <code>1</code>, respectively. The viewport is a common tag included in the <code><head></code> of an HTML page.</p> <p>To resolve the viewport error, add the following HTML snippet to the <code><head></code> tag:</p> <div class="-ta"><pre><span></span><code><span class="p"><</span><span class="nt">meta</span> <span class="na">name</span><span class="o">=</span><span class="s">"viewport"</span> <span class="na">content</span><span class="o">=</span><span class="s">"width=device-width"</span><span class="p">></span> </code></pre></div> <p>The values specified for <code>width</code> and <code>minimum-scale</code> are the required values in AMP. Defining <code>initial-scale</code> is not mandatory but it’s a commonly included in mobile web development and it's recommended. You can read more about the viewport and responsive design in <a href="https://developers.google.com/speed/docs/insights/ConfigureViewport">Configure the Viewport</a>.</p> <p>As before, <strong>reload</strong> the page and check if the error has disappeared.</p> <h2 id="replace-external-stylesheets">Replace external stylesheets</h2> <p>The following error is related to our use of stylesheets:</p> <pre class="error-text">The attribute 'href' in tag 'link rel=stylesheet for fonts' is set to the invalid value 'base.css'. </pre> <p>Specifically, this error is complaining about the following stylesheet link tag in our <code><head></code> tag:</p> <div class="-ta"><pre><span></span><code><span class="p"><</span><span class="nt">link</span> <span class="na">href</span><span class="o">=</span><span class="s">"base.css"</span> <span class="na">rel</span><span class="o">=</span><span class="s">"stylesheet"</span> <span class="p">/></span> </code></pre></div> <p>The problem is that this is an external stylesheet reference. In AMP, to keep the load times of documents as fast as possible, you cannot include external stylesheets. Instead, all stylesheet rules must be embedded in the AMP document using <code><style amp-custom></style></code> tags, or as inline styles.</p> <div class="-ta"><pre><span></span><code><span class="p"><</span><span class="nt">style</span> <span class="na">amp-custom</span><span class="p">></span> <span class="c">/* The content from base.css */</span> <span class="p"></</span><span class="nt">style</span><span class="p">></span> </code></pre></div> <p>So, let's resolve the error:</p> <ol> <li><strong>Remove</strong> the <code><link></code> tag pointing to the stylesheet in the <code><head></code> and replace it with an inline <code><style amp-custom></style></code> tag. The <code>amp-custom</code> attribute on the style tag is mandatory.</li> <li><strong>Copy</strong> all the styles from the <a href="https://github.com/googlecodelabs/accelerated-mobile-pages-foundations/blob/master/base.css"><code>base.css</code></a> file into the <code><style amp-custom></style></code> tags.</li> </ol> <p>Once again, <strong>reload</strong> the page and verify that the stylesheets error has disappeared.</p> <p> </p><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"/></svg> </div> <div class="ap-m-tip-content"> <strong>NOTE –</strong> Not only is embedded styling required but there is a file size limit of 50 kilobytes for all styling information. You should use CSS preprocessors such as <a href="http://sass-lang.com/">SASS</a> to minify your CSS before inlining the CSS in your AMP pages. </div> </div><p></p> <p> </p><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="#warning-sign"/></svg> </div> <div class="ap-m-tip-content"> <strong>IMPORTANT –</strong> You can only have one style tag in your entire AMP document. If you have several external stylesheets referenced by your AMP pages, you will need to collate these stylesheets into a single set of rules. To learn what CSS rules are valid in AMP, read <a href="/documentation/guides-and-tutorials/develop/style_and_layout/style_pages/">Supported CSS</a>. </div> </div><p></p> <h2 id="exclude-third-party-javascript">Exclude third-party JavaScript</h2> <p>While stylesheets can be reworked relatively easily with AMP by inlining the CSS, the same is not true for JavaScript.</p> <pre class="error-text">The tag 'script' is disallowed except in specific forms. </pre> <p>In general, scripts in AMP are only allowed if they follow two major requirements:</p> <ol> <li>All JavaScript must be asynchronous (i.e., include the <code>async</code> attribute in the script tag).</li> <li>The JavaScript is for the AMP library and for any AMP components on the page.</li> </ol> <p>This effectively rules out the use of all user-generated/third-party JavaScript in AMP except as noted below.</p> <p> </p><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"/></svg> </div> <div class="ap-m-tip-content"> The only exceptions to the restriction on user-generated/third-party scripts are:<p></p> <ol> <li>Script that adds metadata to the page or that configures AMP components. These will have the type attribute <code>application/ld+json</code> or <code>application/json</code>.</li> <li>Script included in iframes. Including JavaScript in an iframe should be considered a measure of last resort. Wherever possible, JavaScript functionality should be replaced by using <a href="/documentation/components/">AMP components</a>. We will explore our first AMP component in the next section. </li></ol></div> </div> <p>Try opening the external <a href="https://github.com/googlecodelabs/accelerated-mobile-pages-foundations/blob/master/base.js"><code>base.js</code></a> file. What do you see? The file should be empty of any JavaScript code and only include a comment of information such as this:</p> <div class="-ta"><pre><span></span><code><span class="cm">/*</span> <span class="cm">This external JavaScript file is intentionally empty.</span> <span class="cm">Its purpose is merely to demonstrate the AMP validation error related to the</span> <span class="cm">use of external JavaScript files.</span> <span class="cm">*/</span> </code></pre></div> <p>Considering that this external JavaScript file is not a functional component of our website, we can safely remove the reference entirely.</p> <p><strong>Remove</strong> the following external JavaScript reference from your document:</p> <div class="-ta"><pre><span></span><code><span class="p"><</span><span class="nt">script</span> <span class="na">type</span><span class="o">=</span><span class="s">"text/javascript"</span> <span class="na">src</span><span class="o">=</span><span class="s">"base.js"</span><span class="p">></</span><span class="nt">script</span><span class="p">></span> </code></pre></div> <p>Now, <strong>reload</strong> the page and verify that the script error has disappeared.</p> <h2 id="include-amp-css-boilerplate">Include AMP CSS boilerplate</h2> <p>The following errors reference missing boilerplate code:</p> <pre class="error-text">The mandatory tag 'noscript enclosure for boilerplate' is missing or incorrect. The mandatory tag 'head > style : boilerplate' is missing or incorrect. The mandatory tag 'noscript > style : boilerplate' is missing or incorrect. </pre> <p>Every AMP document requires the following AMP boilerplate code:</p> <div class="-ta"><pre><span></span><code><span class="p"><</span><span class="nt">style</span> <span class="na">amp-boilerplate</span><span class="p">></span><span class="nt">body</span><span class="p">{</span><span class="kp">-webkit-</span><span class="k">animation</span><span class="p">:</span><span class="o">-</span><span class="n">amp-start</span> <span class="mi">8</span><span class="kt">s</span> <span class="nb">steps</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span><span class="kc">end</span><span class="p">)</span> <span class="mi">0</span><span class="kt">s</span> <span class="mi">1</span> <span class="kc">normal</span> <span class="kc">both</span><span class="p">;</span><span class="kp">-moz-</span><span class="k">animation</span><span class="p">:</span><span class="o">-</span><span class="n">amp-start</span> <span class="mi">8</span><span class="kt">s</span> <span class="nb">steps</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span><span class="kc">end</span><span class="p">)</span> <span class="mi">0</span><span class="kt">s</span> <span class="mi">1</span> <span class="kc">normal</span> <span class="kc">both</span><span class="p">;</span><span class="kp">-ms-</span><span class="k">animation</span><span class="p">:</span><span class="o">-</span><span class="n">amp-start</span> <span class="mi">8</span><span class="kt">s</span> <span class="nb">steps</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span><span class="kc">end</span><span class="p">)</span> <span class="mi">0</span><span class="kt">s</span> <span class="mi">1</span> <span class="kc">normal</span> <span class="kc">both</span><span class="p">;</span><span class="k">animation</span><span class="p">:</span><span class="o">-</span><span class="n">amp-start</span> <span class="mi">8</span><span class="kt">s</span> <span class="nb">steps</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span><span class="kc">end</span><span class="p">)</span> <span class="mi">0</span><span class="kt">s</span> <span class="mi">1</span> <span class="kc">normal</span> <span class="kc">both</span><span class="p">}@</span><span class="k">-webkit-keyframes</span> <span class="nt">-amp-start</span><span class="p">{</span><span class="nt">from</span><span class="p">{</span><span class="k">visibility</span><span class="p">:</span><span class="kc">hidden</span><span class="p">}</span><span class="nt">to</span><span class="p">{</span><span class="k">visibility</span><span class="p">:</span><span class="kc">visible</span><span class="p">}}@</span><span class="k">-moz-keyframes</span> <span class="nt">-amp-start</span><span class="p">{</span><span class="nt">from</span><span class="p">{</span><span class="k">visibility</span><span class="p">:</span><span class="kc">hidden</span><span class="p">}</span><span class="nt">to</span><span class="p">{</span><span class="k">visibility</span><span class="p">:</span><span class="kc">visible</span><span class="p">}}@</span><span class="k">-ms-keyframes</span> <span class="nt">-amp-start</span><span class="p">{</span><span class="nt">from</span><span class="p">{</span><span class="k">visibility</span><span class="p">:</span><span class="kc">hidden</span><span class="p">}</span><span class="nt">to</span><span class="p">{</span><span class="k">visibility</span><span class="p">:</span><span class="kc">visible</span><span class="p">}}@</span><span class="k">-o-keyframes</span> <span class="nt">-amp-start</span><span class="p">{</span><span class="nt">from</span><span class="p">{</span><span class="k">visibility</span><span class="p">:</span><span class="kc">hidden</span><span class="p">}</span><span class="nt">to</span><span class="p">{</span><span class="k">visibility</span><span class="p">:</span><span class="kc">visible</span><span class="p">}}@</span><span class="k">keyframes</span> <span class="nt">-amp-start</span><span class="p">{</span><span class="nt">from</span><span class="p">{</span><span class="k">visibility</span><span class="p">:</span><span class="kc">hidden</span><span class="p">}</span><span class="nt">to</span><span class="p">{</span><span class="k">visibility</span><span class="p">:</span><span class="kc">visible</span><span class="p">}}</</span><span class="nt">style</span><span class="p">><</span><span class="nt">noscript</span><span class="p">><</span><span class="nt">style</span> <span class="na">amp-boilerplate</span><span class="p">></span><span class="nt">body</span><span class="p">{</span><span class="kp">-webkit-</span><span class="k">animation</span><span class="p">:</span><span class="kc">none</span><span class="p">;</span><span class="kp">-moz-</span><span class="k">animation</span><span class="p">:</span><span class="kc">none</span><span class="p">;</span><span class="kp">-ms-</span><span class="k">animation</span><span class="p">:</span><span class="kc">none</span><span class="p">;</span><span class="k">animation</span><span class="p">:</span><span class="kc">none</span><span class="p">}</</span><span class="nt">style</span><span class="p">></</span><span class="nt">noscript</span><span class="p">></span> </code></pre></div> <p><strong>Add</strong> the boilerplate code to the bottom of the <code><head></code> tag of your document.</p> <p>The <code><style amp-boilerplate></code> tag initially hides the content of the body until the AMP JavaScript library is loaded, then the content is rendered. AMP does this to prevent unstyled content from rendering, also known as Flash Of Unstyled Content (FOUC). This helps ensure that the user experience feels truly instant as the page’s content appears all at once and everything above the fold is rendered together. The second tag reverts this logic if JavaScript is disabled in the browser.</p> <h2 id="replace-<img>-with-<amp-img>">Replace <code><img></code> with <code><amp-img></code></h2> <p>AMP doesn't support the default HTML counterparts to displaying media, which explains the following error:</p> <pre class="error-text">The tag 'img' may only appear as a descendant of tag 'noscript'. Did you mean 'amp-img'? </pre> <p>AMP has a web component specifically designed to replace the <code><img></code> tag, it's the <a href="/documentation/components/amp-img/"><code><amp-img></code></a> tag:</p> <div class="-ta"><pre><span></span><code><span class="p"><</span><span class="nt">amp-img</span> <span class="na">src</span><span class="o">=</span><span class="s">"mountains.jpg"</span><span class="p">></</span><span class="nt">amp-img</span><span class="p">></span> </code></pre></div> <p><strong>Replace</strong> the <code><img></code> tag with the above <a href="/documentation/components/amp-img/"><code><amp-img></code></a> tag and run the validator again. You should receive several new errors:</p> <pre class="error-text">Layout not supported: container The implied layout 'CONTAINER' is not supported by tag 'amp-img'. </pre> <p>Why did <a href="/documentation/components/amp-img/"><code>amp-img</code></a> trigger another error? Because <a href="/documentation/components/amp-img/"><code>amp-img</code></a> is not a direct substitute of the traditional HTML img tag. There are additional requirements when using <a href="/documentation/components/amp-img/"><code>amp-img</code></a>.</p> <h3 id="amp-layout-system">AMP layout system</h3> <p>The layout error is telling us that <a href="/documentation/components/amp-img/"><code>amp-img</code></a> does not support the <code>container</code> layout type. One of the most important concepts in AMP’s design is its focus on reducing the amount of DOM reflow required to render its web pages.</p> <p>To reduce DOM reflow, AMP includes a layout system to ensure the layout of the page is known as early as possible in the lifecycle of downloading and rendering the page.</p> <p>The image below compares how an HTML page is often laid out compared to the approach AMP enforces. Notice in the approach on the left how the text reflows each time an ad or image is loaded. AMP's approach to layout keeps the text from moving around--even if the images and ads take a long time to load.</p> <p></p><figure class="alignment-wrapper margin- shadow"> <amp-img src="/static/img/docs/tutorials/tut-convert-html-layout-system.png" width="837" height="394" layout="responsive" alt class="i-amphtml-layout-responsive i-amphtml-layout-size-defined" i-amphtml-layout="responsive"><i-amphtml-sizer slot="i-amphtml-svc" style="display:block;padding-top:47.0729%"></i-amphtml-sizer></amp-img> <figcaption>A comparison between how content is normally laid out and AMP's approach</figcaption></figure><p></p> <p>The AMP layout system allows for elements on a page to be positioned and scaled in a variety of ways -- fixed dimensions, responsive design, fixed height and more.</p> <p>In the case of our article, the layout system inferred the layout type for the <a href="/documentation/components/amp-img/"><code>amp-img</code></a> as the <code>container</code> type. However, the <code>container</code> type is only applicable to elements that contain children elements. The <code>container</code> type is incompatible with the <a href="/documentation/components/amp-img/"><code>amp-img</code></a> tag, which is the reason for this error.</p> <p>Why was the <code>container</code> type inferred? Because we did not specify a <code>height</code> attribute for the <a href="/documentation/components/amp-img/"><code>amp-img</code></a> tag. In HTML, reflow can be reduced by always specifying a fixed width and height for elements on a page. In AMP, you need to define the width and height for <a href="/documentation/components/amp-img/"><code>amp-img</code></a> elements so that AMP can pre-determine the aspect ratio of the element.</p> <p><strong>Add</strong> the <code>width</code> and <code>height</code> to your <a href="/documentation/components/amp-img/"><code>amp-img</code></a> tag as follows:</p> <div class="-ta"><pre><span></span><code><span class="p"><</span><span class="nt">amp-img</span> <span class="na">src</span><span class="o">=</span><span class="s">"mountains.jpg"</span> <span class="na">width</span><span class="o">=</span><span class="s">"266"</span> <span class="na">height</span><span class="o">=</span><span class="s">"150"</span><span class="p">></</span><span class="nt">amp-img</span><span class="p">></span> </code></pre></div> <p>Refresh the page and check the validator; you should no longer see any errors!</p> <p>You now have a valid AMP document, but the image doesn’t look so great because it is awkwardly positioned on the page. By default when you specify the height and width for an <a href="/documentation/components/amp-img/"><code>amp-img</code></a> AMP will fix the dimensions to what you specify--but wouldn't it be great if AMP would scale the image to <em>responsively</em> stretch and fit the page no matter the screen size?</p> <p></p><figure class="alignment-wrapper center third margin- shadow"> <amp-img src="/static/img/docs/tutorials/tut-convert-html-not-responsive.png" width="412" height="660" layout="responsive" alt class="i-amphtml-layout-responsive i-amphtml-layout-size-defined" i-amphtml-layout="responsive"><i-amphtml-sizer slot="i-amphtml-svc" style="display:block;padding-top:160.1942%"></i-amphtml-sizer></amp-img> <figcaption>Our image isn't responsive.</figcaption></figure><p></p> <p>Fortunately AMP can figure out the aspect ratio of elements from the width & height you specify. This allows the AMP layout system to position and scale the element in a variety of ways. The <code>layout</code> attribute informs AMP of how you want the element positioned and scaled.</p> <p>Let's <strong>set</strong> the layout attribute to <code>responsive</code> so that our image scales and resizes:</p> <div class="-ta"><pre><span></span><code><span class="p"><</span><span class="nt">amp-img</span> <span class="na">src</span><span class="o">=</span><span class="s">"mountains.jpg"</span> <span class="na">layout</span><span class="o">=</span><span class="s">"responsive"</span> <span class="na">width</span><span class="o">=</span><span class="s">"266"</span> <span class="na">height</span><span class="o">=</span><span class="s">"150"</span><span class="p">></</span><span class="nt">amp-img</span><span class="p">></span> </code></pre></div> <p>Voila! Our image is in the correct aspect ratio and responsively fills the width of the screen.</p> <p></p><figure class="alignment-wrapper center third margin- shadow"> <amp-img src="/static/img/docs/tutorials/tut-convert-html-responsive.png" width="412" height="660" layout="responsive" alt class="i-amphtml-layout-responsive i-amphtml-layout-size-defined" i-amphtml-layout="responsive"><i-amphtml-sizer slot="i-amphtml-svc" style="display:block;padding-top:160.1942%"></i-amphtml-sizer></amp-img> <figcaption>Our image is now responsive!</figcaption></figure><p></p> <p> </p><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="#bookmark"/></svg> </div> <div class="ap-m-tip-content"> <strong>READ ON –</strong> Learn more about the AMP Layout System in the <a href="/documentation/guides-and-tutorials/learn/amp-html-layout/">AMP Layout Specification</a>. </div> </div><p></p> <h2 id="success!">Success!</h2> <p>Now your AMP document should look something like this:</p> <div class="-ta"><pre><span></span><code><span class="cp"><!doctype html></span> <span class="p"><</span><span class="nt">html</span> <span class="err">⚡</span> <span class="na">lang</span><span class="o">=</span><span class="s">"en"</span><span class="p">></span> <span class="p"><</span><span class="nt">head</span><span class="p">></span> <span class="p"><</span><span class="nt">meta</span> <span class="na">charset</span><span class="o">=</span><span class="s">"utf-8"</span> <span class="p">/></span> <span class="p"><</span><span class="nt">meta</span> <span class="na">name</span><span class="o">=</span><span class="s">"viewport"</span> <span class="na">content</span><span class="o">=</span><span class="s">"width=device-width"</span><span class="p">></span> <span class="p"><</span><span class="nt">link</span> <span class="na">rel</span><span class="o">=</span><span class="s">"canonical"</span> <span class="na">href</span><span class="o">=</span><span class="s">"/article.html"</span><span class="p">></span> <span class="p"><</span><span class="nt">link</span> <span class="na">rel</span><span class="o">=</span><span class="s">"shortcut icon"</span> <span class="na">href</span><span class="o">=</span><span class="s">"amp_favicon.png"</span><span class="p">></span> <span class="p"><</span><span class="nt">title</span><span class="p">></span>News Article<span class="p"></</span><span class="nt">title</span><span class="p">></span> <span class="p"><</span><span class="nt">style</span> <span class="na">amp-boilerplate</span><span class="p">></span><span class="nt">body</span><span class="p">{</span><span class="kp">-webkit-</span><span class="k">animation</span><span class="p">:</span><span class="o">-</span><span class="n">amp-start</span> <span class="mi">8</span><span class="kt">s</span> <span class="nb">steps</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span><span class="kc">end</span><span class="p">)</span> <span class="mi">0</span><span class="kt">s</span> <span class="mi">1</span> <span class="kc">normal</span> <span class="kc">both</span><span class="p">;</span><span class="kp">-moz-</span><span class="k">animation</span><span class="p">:</span><span class="o">-</span><span class="n">amp-start</span> <span class="mi">8</span><span class="kt">s</span> <span class="nb">steps</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span><span class="kc">end</span><span class="p">)</span> <span class="mi">0</span><span class="kt">s</span> <span class="mi">1</span> <span class="kc">normal</span> <span class="kc">both</span><span class="p">;</span><span class="kp">-ms-</span><span class="k">animation</span><span class="p">:</span><span class="o">-</span><span class="n">amp-start</span> <span class="mi">8</span><span class="kt">s</span> <span class="nb">steps</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span><span class="kc">end</span><span class="p">)</span> <span class="mi">0</span><span class="kt">s</span> <span class="mi">1</span> <span class="kc">normal</span> <span class="kc">both</span><span class="p">;</span><span class="k">animation</span><span class="p">:</span><span class="o">-</span><span class="n">amp-start</span> <span class="mi">8</span><span class="kt">s</span> <span class="nb">steps</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span><span class="kc">end</span><span class="p">)</span> <span class="mi">0</span><span class="kt">s</span> <span class="mi">1</span> <span class="kc">normal</span> <span class="kc">both</span><span class="p">}@</span><span class="k">-webkit-keyframes</span> <span class="nt">-amp-start</span><span class="p">{</span><span class="nt">from</span><span class="p">{</span><span class="k">visibility</span><span class="p">:</span><span class="kc">hidden</span><span class="p">}</span><span class="nt">to</span><span class="p">{</span><span class="k">visibility</span><span class="p">:</span><span class="kc">visible</span><span class="p">}}@</span><span class="k">-moz-keyframes</span> <span class="nt">-amp-start</span><span class="p">{</span><span class="nt">from</span><span class="p">{</span><span class="k">visibility</span><span class="p">:</span><span class="kc">hidden</span><span class="p">}</span><span class="nt">to</span><span class="p">{</span><span class="k">visibility</span><span class="p">:</span><span class="kc">visible</span><span class="p">}}@</span><span class="k">-ms-keyframes</span> <span class="nt">-amp-start</span><span class="p">{</span><span class="nt">from</span><span class="p">{</span><span class="k">visibility</span><span class="p">:</span><span class="kc">hidden</span><span class="p">}</span><span class="nt">to</span><span class="p">{</span><span class="k">visibility</span><span class="p">:</span><span class="kc">visible</span><span class="p">}}@</span><span class="k">-o-keyframes</span> <span class="nt">-amp-start</span><span class="p">{</span><span class="nt">from</span><span class="p">{</span><span class="k">visibility</span><span class="p">:</span><span class="kc">hidden</span><span class="p">}</span><span class="nt">to</span><span class="p">{</span><span class="k">visibility</span><span class="p">:</span><span class="kc">visible</span><span class="p">}}@</span><span class="k">keyframes</span> <span class="nt">-amp-start</span><span class="p">{</span><span class="nt">from</span><span class="p">{</span><span class="k">visibility</span><span class="p">:</span><span class="kc">hidden</span><span class="p">}</span><span class="nt">to</span><span class="p">{</span><span class="k">visibility</span><span class="p">:</span><span class="kc">visible</span><span class="p">}}</</span><span class="nt">style</span><span class="p">><</span><span class="nt">noscript</span><span class="p">><</span><span class="nt">style</span> <span class="na">amp-boilerplate</span><span class="p">></span><span class="nt">body</span><span class="p">{</span><span class="kp">-webkit-</span><span class="k">animation</span><span class="p">:</span><span class="kc">none</span><span class="p">;</span><span class="kp">-moz-</span><span class="k">animation</span><span class="p">:</span><span class="kc">none</span><span class="p">;</span><span class="kp">-ms-</span><span class="k">animation</span><span class="p">:</span><span class="kc">none</span><span class="p">;</span><span class="k">animation</span><span class="p">:</span><span class="kc">none</span><span class="p">}</</span><span class="nt">style</span><span class="p">></</span><span class="nt">noscript</span><span class="p">></span> <span class="p"><</span><span class="nt">style</span> <span class="na">amp-custom</span><span class="p">></span> <span class="nt">body</span> <span class="p">{</span> <span class="k">width</span><span class="p">:</span> <span class="kc">auto</span><span class="p">;</span> <span class="k">margin</span><span class="p">:</span> <span class="mi">0</span><span class="p">;</span> <span class="k">padding</span><span class="p">:</span> <span class="mi">0</span><span class="p">;</span> <span class="p">}</span> <span class="nt">header</span> <span class="p">{</span> <span class="k">background</span><span class="p">:</span> <span class="n">Tomato</span><span class="p">;</span> <span class="k">color</span><span class="p">:</span> <span class="kc">white</span><span class="p">;</span> <span class="k">font-size</span><span class="p">:</span> <span class="mi">2</span><span class="kt">em</span><span class="p">;</span> <span class="k">text-align</span><span class="p">:</span> <span class="kc">center</span><span class="p">;</span> <span class="p">}</span> <span class="nt">h1</span> <span class="p">{</span> <span class="k">margin</span><span class="p">:</span> <span class="mi">0</span><span class="p">;</span> <span class="k">padding</span><span class="p">:</span> <span class="mf">0.5</span><span class="kt">em</span><span class="p">;</span> <span class="k">background</span><span class="p">:</span> <span class="kc">white</span><span class="p">;</span> <span class="k">box-shadow</span><span class="p">:</span> <span class="mi">0</span><span class="kt">px</span> <span class="mi">3</span><span class="kt">px</span> <span class="mi">5</span><span class="kt">px</span> <span class="kc">grey</span><span class="p">;</span> <span class="p">}</span> <span class="nt">p</span> <span class="p">{</span> <span class="k">padding</span><span class="p">:</span> <span class="mf">0.5</span><span class="kt">em</span><span class="p">;</span> <span class="k">margin</span><span class="p">:</span> <span class="mf">0.5</span><span class="kt">em</span><span class="p">;</span> <span class="p">}</span> <span class="p"></</span><span class="nt">style</span><span class="p">></span> <span class="p"><</span><span class="nt">script</span> <span class="na">async</span> <span class="na">src</span><span class="o">=</span><span class="s">"https://cdn.ampproject.org/v0.js"</span><span class="p">></</span><span class="nt">script</span><span class="p">></span> <span class="p"></</span><span class="nt">head</span><span class="p">></span> <span class="p"><</span><span class="nt">body</span><span class="p">></span> <span class="p"><</span><span class="nt">header</span><span class="p">></span> News Site <span class="p"></</span><span class="nt">header</span><span class="p">></span> <span class="p"><</span><span class="nt">article</span><span class="p">></span> <span class="p"><</span><span class="nt">h1</span><span class="p">></span>Article Name<span class="p"></</span><span class="nt">h1</span><span class="p">></span> <span class="p"><</span><span class="nt">p</span><span class="p">></span>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Etiam egestas tortor sapien, non tristique ligula accumsan eu.<span class="p"></</span><span class="nt">p</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">"mountains.jpg"</span> <span class="na">layout</span><span class="o">=</span><span class="s">"responsive"</span> <span class="na">width</span><span class="o">=</span><span class="s">"266"</span> <span class="na">height</span><span class="o">=</span><span class="s">"150"</span><span class="p">></</span><span class="nt">amp-img</span><span class="p">></span> <span class="p"></</span><span class="nt">article</span><span class="p">></span> <span class="p"></</span><span class="nt">body</span><span class="p">></span> <span class="p"></</span><span class="nt">html</span><span class="p">></span> </code></pre></div> <p>Refresh the page and look at the console output. You should be greeted with the following message:</p> <pre class="success-text">AMP validation successful. </pre> <h3 id="frequently-asked-questions">Frequently asked questions</h3> <ul> <li><a href="http://stackoverflow.com/a/27637245">What is DOM reflow?</a></li> <li><a href="/documentation/guides-and-tutorials/develop/style_and_layout/control_layout/#what-if-the-layout-attribute-isnt-specified">What if the layout attribute isn’t defined?</a></li> <li><a href="/documentation/guides-and-tutorials/develop/style_and_layout/control_layout/#what-if-width-and-height-are-undefined">What if width and height are undefined?</a></li> </ul> </section> <section class="-t"> <div class="ap--chapter-indicator"> <a href="/documentation/guides-and-tutorials/start/converting/building-page/" class="-n -s ap--previous"> <div class="ap-a-ico -i"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#internal"/></svg> </div> <span class="-r">Previous chapter</span> </a> <a href="/documentation/guides-and-tutorials/start/converting/discoverable/" class="-n -s ap--next"> <span class="-r">Next chapter</span> <div class="ap-a-ico -i"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#internal"/></svg> </div> </a> </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 class="ap-a-ico ap-m-format-toggle-angle"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-solid"/></svg> </span> </button> <div class="ap-m-format-toggle-formats"> <a class="ap-m-format-toggle-link ap-m-format-toggle-link-stories" href="/documentation/guides-and-tutorials/stories/start/converting/resolving-errors/"> <span class="ap-a-ico"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#amp-stories"/></svg> </span> <span>stories</span> </a> <a class="ap-m-format-toggle-link ap-m-format-toggle-link-ads" href="/documentation/guides-and-tutorials/ads/start/converting/resolving-errors/"> <span class="ap-a-ico"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#amp-ads"/></svg> </span> <span>ads</span> </a> <a class="ap-m-format-toggle-link ap-m-format-toggle-link-email" href="/documentation/guides-and-tutorials/email/start/converting/resolving-errors/"> <span class="ap-a-ico"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#amp-email"/></svg> </span> <span>email</span> </a> </div> </div> <div class="ap-o-sidebar-default"> <div class="ap-o-sidebar"> <div class="nav"> <ul class="nav-list level-1"> <li class="nav-item active level-1"> <span class="nav-link"> <span>Start</span> </span> <input class="nav-trigger" type="checkbox" checked> <div class="nav-icon"> <svg class="ap-a-ico"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-solid"/></svg> </div> <ul class="nav-list level-2"> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/create/"> <span>Create your first AMP</span> <span class="nav-link-lastword">Page<svg class="ap-a-ico nav-type-icon"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#tutorial"/></svg></span> </a> <input class="nav-trigger" type="checkbox"> <div class="nav-icon"> <svg class="ap-a-ico light"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-light"/></svg> </div> <ul class="nav-list level-3"> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/create/basic_markup/"> Starter code </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/create/include_image/"> Include an image </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/create/presentation_layout/"> Adding style </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/create/prepare_for_discovery/"> Plug and play components </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/create/actions_events/"> Actions and events </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/create/preview_and_validate/"> Preview and validate </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/create/publish/"> Keep going </a> </li> </ul> </li> <li class="nav-item-tutorial-divider"></li> <li class="nav-item active level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/converting/"> <span>Convert HTML to</span> <span class="nav-link-lastword">AMP<svg class="ap-a-ico nav-type-icon"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#tutorial"/></svg></span> </a> <input class="nav-trigger" type="checkbox" checked> <div class="nav-icon"> <svg class="ap-a-ico light"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-light"/></svg> </div> <ul class="nav-list level-3"> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress ap-m-tutorial-progress-finished"></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/converting/setting-up/"> Setting up </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress ap-m-tutorial-progress-finished"></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/converting/building-page/"> Building a regular HTML page </a> </li> <li class="nav-item active level-3" autoscroll> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/converting/resolving-errors/"> Resolving validation errors </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/converting/discoverable/"> Making your page discoverable </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/converting/congratulations/"> Congratulations! </a> </li> </ul> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/add_advanced/"> <span>Add advanced AMP</span> <span class="nav-link-lastword">features<svg class="ap-a-ico nav-type-icon"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#tutorial"/></svg></span> </a> <input class="nav-trigger" type="checkbox"> <div class="nav-icon"> <svg class="ap-a-ico light"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-light"/></svg> </div> <ul class="nav-list level-3"> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/add_advanced/setting_up/"> Setting up </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/add_advanced/review_code/"> Reviewing the starter code </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/add_advanced/adding_components/"> Adding extended AMP components </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/add_advanced/adding_carousels/"> Adding carousels </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/add_advanced/tracking_data/"> Tracking engagement with analytics </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/add_advanced/navigating/"> Navigating your site </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/add_advanced/fonts/"> Adding fonts </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/start/add_advanced/congratulations/"> Congratulations! </a> </li> </ul> </li> </ul> </li> <li class="nav-item level-1"> <span class="nav-link"> <span>Learn</span> </span> <input class="nav-trigger" type="checkbox"> <div class="nav-icon"> <svg class="ap-a-ico"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-solid"/></svg> </div> <ul class="nav-list level-2"> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/learn/amp-actions-and-events/"> Actions and events </a> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/learn/common_attributes/"> Common element attributes </a> </li> <li class="nav-item level-2"> <span class="nav-link"> <span>AMP HTML Specification</span> </span> <input class="nav-trigger" type="checkbox"> <div class="nav-icon"> <svg class="ap-a-ico light"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-light"/></svg> </div> <ul class="nav-list level-3"> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/learn/spec/amp-boilerplate/"> AMP Boilerplate Code </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/learn/spec/amp-html-responsive-attributes/"> AMP HTML Responsive Attributes </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/learn/spec/amp-video-interface/"> Video in AMP </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/learn/spec/amphtml/"> AMP HTML Specification </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/learn/spec/release-schedule/"> AMP Release Schedule </a> </li> </ul> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/learn/experimental/"> Enable experimental features </a> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/learn/amp-html-layout/"> <span>AMP's Layout System</span> </a> <input class="nav-trigger" type="checkbox"> <div class="nav-icon"> <svg class="ap-a-ico light"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-light"/></svg> </div> <ul class="nav-list level-3"> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/learn/amp-html-layout/"> AMPHTML Layout System </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/learn/amp-html-layout/layouts_demonstrated/"> Demonstrating AMP layouts </a> </li> </ul> </li> <li class="nav-item level-2"> <span class="nav-link"> <span>Validation Workflow</span> </span> <input class="nav-trigger" type="checkbox"> <div class="nav-icon"> <svg class="ap-a-ico light"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-light"/></svg> </div> <ul class="nav-list level-3"> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/learn/validation-workflow/validate_amp/"> Validate AMP pages </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/learn/validation-workflow/validation_errors/"> AMP validation errors </a> </li> </ul> </li> <li class="nav-item level-2"> <span class="nav-link"> <span>AMP Caches & CORS</span> </span> <input class="nav-trigger" type="checkbox"> <div class="nav-icon"> <svg class="ap-a-ico light"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-light"/></svg> </div> <ul class="nav-list level-3"> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/learn/amp-caches-and-cors/amp-cache-debugging/"> Debug AMP Cache issues </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/learn/amp-caches-and-cors/amp-cors-requests/"> CORS in AMP </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/learn/amp-caches-and-cors/how_amp_pages_are_cached/"> How AMP pages are cached </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/learn/amp-caches-and-cors/amp-cache-urls/"> AMP Cache URL Format and Request Handling </a> </li> </ul> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/learn/combine-amp-pwa/"> How AMP and PWA relate to each other </a> </li> </ul> </li> <li class="nav-item level-1"> <span class="nav-link"> <span>Develop</span> </span> <input class="nav-trigger" type="checkbox"> <div class="nav-icon"> <svg class="ap-a-ico"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-solid"/></svg> </div> <ul class="nav-list level-2"> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/style_and_layout/"> <span>Style & Layout</span> </a> <input class="nav-trigger" type="checkbox"> <div class="nav-icon"> <svg class="ap-a-ico light"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-light"/></svg> </div> <ul class="nav-list level-3"> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/style_and_layout/style_pages/"> Supported CSS </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/style_and_layout/control_layout/"> Layout & media queries </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/style_and_layout/placeholders/"> Placeholders & fallbacks </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/style_and_layout/art_direction/"> Responsive images with srcset, sizes & heights </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/style_and_layout/responsive_design/"> Create responsive AMP pages </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/style_and_layout/custom_fonts/"> Add custom fonts </a> </li> </ul> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/media_iframes_3p/"> <span>Include media, iframes & third-party content</span> </a> <input class="nav-trigger" type="checkbox"> <div class="nav-icon"> <svg class="ap-a-ico light"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-light"/></svg> </div> <ul class="nav-list level-3"> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/media_iframes_3p/"> Include images & video </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/media_iframes_3p/third_party_components/"> Include third-party content </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/media_iframes_3p/iframes/"> Include iframes </a> </li> </ul> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/interactivity_guide/"> <span>Interactivity</span> </a> <input class="nav-trigger" type="checkbox"> <div class="nav-icon"> <svg class="ap-a-ico light"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-light"/></svg> </div> <ul class="nav-list level-3"> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/interactivity_guide/foundations/"> Interactivity foundations </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/interactivity_guide/ready_made/"> Ready-made interactivity with AMP components </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/interactivity_guide/personalized_experiences/"> Building personalized interactive experiences </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/interactivity_guide/client_rendering/"> Client-side rendering in AMP </a> </li> </ul> </li> <li class="nav-item level-2"> <span class="nav-link"> <span>Animate & Transition</span> </span> <input class="nav-trigger" type="checkbox"> <div class="nav-icon"> <svg class="ap-a-ico light"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-light"/></svg> </div> <ul class="nav-list level-3"> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/animations/triggering_css_animations/"> Triggering CSS animations & transitions </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/animations/introduction_to_animations/"> Introduction to complex animations </a> </li> </ul> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/custom-javascript/"> Use custom JavaScript in AMP pages </a> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/monetization/"> <span>Monetize your AMP pages</span> </a> <input class="nav-trigger" type="checkbox"> <div class="nav-icon"> <svg class="ap-a-ico light"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-light"/></svg> </div> <ul class="nav-list level-3"> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/monetization/"> Monetizing your AMP page with ads </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/monetization/ads_vendors/"> Ads vendors </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/monetization/content_encryption/"> Protect your subscription content with client-side encryption </a> </li> </ul> </li> <li class="nav-item-tutorial-divider"></li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/interactivity/"> <span>Create interactive AMP</span> <span class="nav-link-lastword">pages<svg class="ap-a-ico nav-type-icon"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#tutorial"/></svg></span> </a> <input class="nav-trigger" type="checkbox"> <div class="nav-icon"> <svg class="ap-a-ico light"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-light"/></svg> </div> <ul class="nav-list level-3"> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/interactivity/prereqs-setup/"> Setting up </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/interactivity/get-familiar/"> Getting familiar with the starter code </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/interactivity/advanced-interactivity/"> Improving the interactivity </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/interactivity/remote-data/"> Working with remote data </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/interactivity/wrapping-up/"> Wrapping up </a> </li> </ul> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/login_requiring/"> <span>Create a login-requiring AMP</span> <span class="nav-link-lastword">page<svg class="ap-a-ico nav-type-icon"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#tutorial"/></svg></span> </a> <input class="nav-trigger" type="checkbox"> <div class="nav-icon"> <svg class="ap-a-ico light"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-light"/></svg> </div> <ul class="nav-list level-3"> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/login_requiring/login/"> Login </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/login_requiring/add_comment/"> Add a comment </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/login_requiring/logout/"> Logout </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/login_requiring/summary/"> Summary </a> </li> </ul> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/custom-javascript-tutorial/"> Create a UI widget with custom JavaScript <svg class="ap-a-ico nav-type-icon"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#tutorial"/></svg> </a> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/live_blog/"> Create a live blog <svg class="ap-a-ico nav-type-icon"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#tutorial"/></svg> </a> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/develop/seatmap/"> Create a seatmap <svg class="ap-a-ico nav-type-icon"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#tutorial"/></svg> </a> </li> </ul> </li> <li class="nav-item level-1"> <span class="nav-link"> <span>Integrate</span> </span> <input class="nav-trigger" type="checkbox"> <div class="nav-icon"> <svg class="ap-a-ico"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-solid"/></svg> </div> <ul class="nav-list level-2"> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/integrate/web-story-player-guide/"> Creating Web Story experiences using the Web Story Player on non-AMP sites </a> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/integrate/amp-in-pwa/"> Use AMP as a data source for your PWA </a> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/integrate/amp-to-pwa/"> Preload your PWA from your AMP pages </a> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/integrate/integrate-with-apps/"> Integrate AMP with your app </a> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/integrate/embed-stories/"> Integrate stories in AMP pages </a> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/integrate/embed-stories-nonamp/"> Integrate Web Stories in non-AMP pages </a> </li> </ul> </li> <li class="nav-item level-1"> <span class="nav-link"> <span>Optimize & Measure</span> </span> <input class="nav-trigger" type="checkbox"> <div class="nav-icon"> <svg class="ap-a-ico"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-solid"/></svg> </div> <ul class="nav-list level-2"> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/optimize-and-measure/amp-managing-user-state/"> Manage non-authenticated user state with AMP </a> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/optimize-and-measure/publishing_checklist/"> AMP publishing checklist </a> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/optimize-and-measure/amp-optimizer-guide/"> <span>Using an AMP Optimizer</span> </a> <input class="nav-trigger" type="checkbox"> <div class="nav-icon"> <svg class="ap-a-ico light"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-light"/></svg> </div> <ul class="nav-list level-3"> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/optimize-and-measure/amp-optimizer-guide/explainer/"> How an AMP Optimizer works </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/optimize-and-measure/amp-optimizer-guide/node-amp-optimizer/"> Node.js AMP Optimizer Guide </a> </li> </ul> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/optimize-and-measure/configure-analytics/"> <span>Track engagement with analytics</span> </a> <input class="nav-trigger" type="checkbox"> <div class="nav-icon"> <svg class="ap-a-ico light"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-light"/></svg> </div> <ul class="nav-list level-3"> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/optimize-and-measure/configure-analytics/analytics-vendors/"> Analytics Vendors </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/optimize-and-measure/configure-analytics/analytics_basics/"> Analytics: the basics </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/optimize-and-measure/configure-analytics/deep_dive_analytics/"> Deep dive into AMP analytics </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/optimize-and-measure/configure-analytics/use_cases/"> Use cases </a> </li> </ul> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/optimize-and-measure/signed-exchange/"> Serve AMP using signed exchanges </a> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/optimize-and-measure/discovery/"> Make your pages discoverable </a> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/optimize-and-measure/engagement/"> Improve user engagement </a> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/optimize-and-measure/optimize_amp/"> Optimize your hosted AMP pages </a> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/optimize-and-measure/secure-pages/"> Secure from third party attacks </a> </li> <li class="nav-item-tutorial-divider"></li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/optimize-and-measure/amp_to_pwa/"> Turn your AMP site into a PWA <svg class="ap-a-ico nav-type-icon"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#tutorial"/></svg> </a> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/optimize-and-measure/amp-as-pwa/"> Easy offline access and improved performance </a> </li> <li class="nav-item-tutorial-divider"></li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/optimize-and-measure/tracking-engagement/"> How to configure basic analytics for your AMP pages <svg class="ap-a-ico nav-type-icon"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#tutorial"/></svg> </a> </li> </ul> </li> <li class="nav-item level-1"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/contribute/"> <span>Contribute</span> </a> <input class="nav-trigger" type="checkbox"> <div class="nav-icon"> <svg class="ap-a-ico"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-solid"/></svg> </div> <ul class="nav-list level-2"> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/contribute/"> How to contribute </a> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/contribute/integrate-your-analytics-tools/"> Integrate your analytics tool with AMP </a> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/contribute/contribute-documentation/"> <span>Contribute documentation</span> </a> <input class="nav-trigger" type="checkbox"> <div class="nav-icon"> <svg class="ap-a-ico light"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-light"/></svg> </div> <ul class="nav-list level-3"> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/contribute/contribute-documentation/documentation-types/websites/"> Documentation types </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/contribute/contribute-documentation/terminology/websites/"> AMP terminology </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/contribute/contribute-documentation/formatting/websites/"> Formatting guides & tutorials </a> </li> </ul> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/contribute/vendor-contributions/"> <span>Third party contributions</span> </a> <input class="nav-trigger" type="checkbox"> <div class="nav-icon"> <svg class="ap-a-ico light"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-light"/></svg> </div> <ul class="nav-list level-3"> <li class="nav-item level-3"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/contribute/vendor-contributions/release-schedule/"> Release Schedule </a> </li> </ul> </li> <li class="nav-item level-2"> <a class="nav-link" href="/documentation/guides-and-tutorials/websites/contribute/translations/"> Contribute translations </a> </li> </ul> </li> </ul> </div> </div> </div> </ul> </nav> </amp-sidebar> <footer class="ap--footer"> <div class="-a"> <div class="-f"> <div class="ap-o-footer-hint">Of course, this site is made with AMP!</div> <div class="-l"> <h5 class="-c">Follow us</h5> <ul class="-h"> <li class="-p"> <a class="ap-a-ico -d" href="https://twitter.com/AMPhtml" rel="noopener" title="Twitter"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#twitter"/></svg> </a> </li> <li class="-p"> <a class="ap-a-ico -d" href="https://www.youtube.com/channel/UCXPBsjgKKG2HqsKBhWA4uQw" rel="noopener" title="YouTube"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#youtube"/></svg> </a> </li> <li class="-p"> <a class="ap-a-ico -d" href="https://blog.amp.dev/" rel="noopener"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#wordpress" title="WordPress"/></svg> </a> </li> <li class="-p"> <a class="ap-a-ico -d" href="https://github.com/ampproject" title="GitHub"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#github"/></svg> </a></li> <li class="-p"> <a class="ap-a-ico -d" href="https://stackoverflow.com/questions/tagged/amp-html" rel="noopener" title="Stackoverflow"><svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#stackoverflow"/></svg></a> </li> </ul> </div> </div> <div class="-v"> <div class="-m"> <h5 class="-g">Overview</h5> <ul class="-y"> <li class="-b"><a href="/about/websites/" class="-w"><div class="ap-a-ico -x"><svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#internal"/></svg></div>AMP Framework</a></li> <li class="-b"><a href="/about/use-cases/" class="-w"><div class="ap-a-ico -x"><svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#internal"/></svg></div>Use Cases</a></li> <li class="-b"><a href="/success-stories/" class="-w"><div class="ap-a-ico -x"><svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#internal"/></svg></div>Success stories</a></li> <li class="-b"><a href="/about/how-amp-works/" class="-w"><div class="ap-a-ico -x"><svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#internal"/></svg></div>Functionality</a></li> </ul> </div> <div class="-m"> <h5 class="-g">Docs</h5> <ul class="-y"> <li class="-b"><a href="/documentation/guides-and-tutorials/" class="-w"><div class="ap-a-ico -x"><svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#internal"/></svg></div>Get Started</a></li> <li class="-b"><a href="/documentation/guides-and-tutorials/" class="-w"><div class="ap-a-ico -x"><svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#internal"/></svg></div>Guides and Tutorials</a></li> <li class="-b"><a href="/documentation/components/" class="-w"><div class="ap-a-ico -x"><svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#internal"/></svg></div>Components</a></li> <li class="-b"><a href="/documentation/examples/" class="-w"><div class="ap-a-ico -x"><svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#internal"/></svg></div>Examples</a></li> <li class="-b"><a href="/documentation/templates/" class="-w"><div class="ap-a-ico -x"><svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#internal"/></svg></div>Design Templates</a></li> <li class="-b"><a href="/documentation/tools/" class="-w"><div class="ap-a-ico -x"><svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#internal"/></svg></div>Tools</a></li> </ul> </div> <div class="-m"> <h5 class="-g">Community</h5> <ul class="-y"> <li class="-b"><a href="/support/faq/platform-and-vendor-partners/" class="-w"><div class="ap-a-ico -x"><svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#internal"/></svg></div>Platform and Vendor Partners</a></li> <li class="-b"><a href="/documentation/guides-and-tutorials/contribute/" class="-w"><div class="ap-a-ico -x"><svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#internal"/></svg></div>Contribute</a></li> <li class="-b"><a href="/community/roadmap/" class="-w"><div class="ap-a-ico -x"><svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#internal"/></svg></div>Roadmap</a></li> </ul> <h5 class="-g">OpenJS Foundation</h5> <ul class="-y"> <li class="-b"><a class="-w" href="https://openjsf.org" rel="noopener"><div class="ap-a-ico -x"><svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#internal"/></svg></div>The OpenJS Foundation</a></li> <li class="-b"><a class="-w" href="https://bylaws.openjsf.org" rel="noopener"><div class="ap-a-ico -x"><svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#internal"/></svg></div>OpenJS Foundation Bylaws</a></li> <li class="-b"><a class="-w" href="https://trademark-policy.openjsf.org" rel="noopener"><div class="ap-a-ico -x"><svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#internal"/></svg></div>Trademark Policy</a></li> <li class="-b"><a class="-w" href="https://trademark-list.openjsf.org" rel="noopener"><div class="ap-a-ico -x"><svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#internal"/></svg></div>Trademark List</a></li> </ul> </div> <div class="-m"> <h5 class="-g">Events</h5> <ul class="-y"> <li class="-b"><a href="https://blog.amp.dev/2020/02/20/amp-conf-2020-return-to-nyc/" class="-w"><div class="ap-a-ico -x"><svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#internal"/></svg></div>AMP Conf 2020</a></li> <li class="-b"><a href="/events/amp-cs-2019/" class="-w"><div class="ap-a-ico -x"><svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#internal"/></svg></div>AMP Contributor Summit 2019</a></li> </ul> <h5 class="-g">AMP Brand Materials</h5> <ul class="-y"> <li class="-b"><a href="/static/files/brand-material/AMP_Mini_Styleguide.pdf" class="-w"><div class="ap-a-ico -x"><svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#download"/></svg></div>Styleguide</a></li> <li class="-b"><a href="/static/files/brand-material/AMP_Logo_Rebrush.zip" class="-w"><div class="ap-a-ico -x"><svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#download"/></svg></div>Logos</a></li> </ul> </div> </div> <div class="-k"> <div class="-_"> <amp-img src="/static/img/logo-openjsf.svg" alt="Logo of the OpenJS Foundation" width="315" height="100" layout="responsive" class="i-amphtml-layout-responsive i-amphtml-layout-size-defined" i-amphtml-layout="responsive"><i-amphtml-sizer slot="i-amphtml-svc" style="display:block;padding-top:31.746%"></i-amphtml-sizer></amp-img> </div> <ul class="-j"> <li class="-q"><a class="-z" href="https://terms-of-use.openjsf.org" rel="noopener">Terms of Use</a></li> <li class="-q"><a class="-z" href="https://privacy-policy.openjsf.org" rel="noopener">Privacy Policy</a></li> <li class="-q"><a class="-z" href="https://www.linuxfoundation.org/cookies" rel="noopener">Cookie Policy</a></li> </ul> </div> <div class="-te"> © <a href="https://openjsf.org">OpenJS Foundation</a> and AMP Project contributors. All rights reserved. The <a href="https://openjsf.org">OpenJS Foundation</a> has registered trademarks and uses trademarks. For a list of trademarks of the <a href="https://openjsf.org">OpenJS Foundation</a>, please see our <a href="https://trademark-policy.openjsf.org">Trademark Policy</a> and <a href="https://trademark-list.openjsf.org">Trademark List</a>. Trademarks and logos not indicated on the <a href="https://trademark-list.openjsf.org">list of OpenJS Foundation trademarks</a> are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them. <br><br> The services available at <a href="https://cdn.ampproject.org">cdn.ampproject.org</a> are provided by Google and the respective <a href="https://policies.google.com/privacy?hl=en">privacy policy</a> applies. </div> </div> </footer> <amp-analytics type="gtag" data-credentials="include" data-block-on-consent class="i-amphtml-layout-fixed i-amphtml-layout-size-defined" style="width:1px;height:1px;" i-amphtml-layout="fixed"> <script type="application/json">{"extraUrlParams":{"cd2":"${ampdocHost}"},"requests":{"CWV_EVENT":"${base}?v=1\u0026t=event\u0026tid=${gtag_id}\u0026cid=0\u0026ec=cwv","base":"https://google-analytics.com/collect/"},"triggers":{"banner":{"on":"click","selector":"#top-banner","vars":{"event_action":"click","event_category":"guides-and-tutorials","event_label":"banner","event_name":"banner"}},"breadcrumbLink":{"on":"click","selector":".ap-m-breadcrumbs-crumb","vars":{"event_action":"link","event_category":"guides-and-tutorials","event_label":"breadcrumbs","event_name":"breadcrumbs"}},"cls":{"extraUrlParams":{"cls":"${cumulativeLayoutShift}"},"on":"visible","request":"CWV_EVENT"},"defaultPageview":{"on":"visible","request":"pageview","vars":{"title":"{{title}}"}},"fid":{"extraUrlParams":{"fid":"${firstInputDelay}"},"on":"visible","request":"CWV_EVENT"},"formatToggle":{"on":"click","selector":".ap-m-format-toggle-link","vars":{"event_action":"link","event_category":"guides-and-tutorials","event_label":"format-toggle","event_name":"format-toggle"}},"lcp":{"extraUrlParams":{"lcp":"${largestContentfulPaint}"},"on":"visible","request":"CWV_EVENT"},"navigation":{"on":"click","selector":".ap--header a, .ap-o-burger-menu-link","vars":{"event_action":"link","event_category":"guides-and-tutorials","event_label":"navigation","event_name":"navigation"}},"scrolledEnd":{"on":"scroll","scrollSpec":{"verticalBoundaries":[90]},"vars":{"event_action":"end","event_category":"guides-and-tutorials","event_label":"scroll","event_name":"scroll"}},"scrolledHalf":{"on":"scroll","scrollSpec":{"verticalBoundaries":[50]},"vars":{"event_action":"half","event_category":"guides-and-tutorials","event_label":"scroll","event_name":"scroll"}},"searchButton":{"on":"click","selector":"#searchTriggerOpen","vars":{"event_action":"open","event_category":"search","event_label":"search","event_name":"search"}},"sidebarLink":{"on":"click","selector":".ap-o-sidebar a","vars":{"event_action":"link","event_category":"guides-and-tutorials","event_label":"sidebar","event_name":"sidebar"}},"sidebarToggle":{"on":"click","selector":"label[for=\"sidebar-desktop\"], label[for=\"sidebar\"]","vars":{"event_action":"toggle","event_category":"guides-and-tutorials","event_label":"sidebar","event_name":"sidebar"}},"tocLink":{"on":"click","selector":".ap-o-toc a","vars":{"event_action":"link","event_category":"guides-and-tutorials","event_label":"toc","event_name":"toc"}},"tocToggle":{"on":"click","selector":".ap-o-toc label","vars":{"event_action":"toggle","event_category":"guides-and-tutorials","event_label":"toc","event_name":"toc"}}},"vars":{"config":{"G-TYM9BH1XCX":{"groups":"default"}},"gtag_id":"G-TYM9BH1XCX"}}</script> </amp-analytics><amp-geo layout="nodisplay" class="i-amphtml-layout-nodisplay" hidden="hidden" i-amphtml-layout="nodisplay"> <script type="application/json">{"ISOCountryGroups":{"eu":["preset-eea"],"doubleOptIn":["de","at","no","gr","lu"]}}</script> </amp-geo> <amp-consent id="consent" class="-o i-amphtml-layout-nodisplay" layout="nodisplay" hidden="hidden" i-amphtml-layout="nodisplay"> <script type="application/json">{"consentInstanceId":"consent","promptUI":"consent-popup","consentRequired":false,"geoOverride":{"eu":{"consentRequired":true}}}</script> <div id="consent-popup" class="consent-popup"> <button type="reset" class="-u" on="tap:consent.dismiss" role="button" tabindex="0" aria-label="Dismiss consent"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#close"/></svg> </button> <p class="ap-o-consent-text"> We use cookies to understand how you use our site and to improve your experience. By continuing to use our site, you accept our <a href="https://policies.google.com/technologies/cookies">use of cookies</a> and <a href="https://policies.google.com/privacy">privacy policy</a>. </p> <button on="tap:consent.accept" class="ap-a-btn" role="button" aria-label="Accept use of cookies">Got it!</button> </div> </amp-consent> <amp-install-serviceworker src="/serviceworker.js" data-iframe-src="https://amp.dev/serviceworker.html" layout="nodisplay" class="i-amphtml-layout-nodisplay" hidden="hidden" i-amphtml-layout="nodisplay"></amp-install-serviceworker> <style amp-keyframes>@keyframes duepduep{0%{transform:translate(0)}49%{transform:translate(40px)}50%{transform:translate(-40px)}to{transform:translate(0)}}@keyframes moveSidebarToggleBackwards{0%{transform:translateX(calc(90vw - 50%))}to{transform:translateX(0)}}@keyframes moveSidebarToggleForwards{0%{transform:translateX(0)}to{transform:translateX(calc(90vw - 50%))}}</style></body></html>