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Responsive images with srcset, sizes & heights - amp.dev
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role="listitem">Русский</a> <a class="-tw" href="/tr/documentation/guides-and-tutorials/develop/style_and_layout/art_direction/" role="listitem">Türkçe</a> <a class="-tw" href="/zh_cn/documentation/guides-and-tutorials/develop/style_and_layout/art_direction/" role="listitem">中文</a> <a class="-tw" href="/pl/documentation/guides-and-tutorials/develop/style_and_layout/art_direction/" role="listitem">Polski</a> <a class="-tw" href="/vi/documentation/guides-and-tutorials/develop/style_and_layout/art_direction/" 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 ? 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'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 "> Sobre </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="/pt_br/about/websites/"> Sites em AMP </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/pt_br/about/stories/"> Web Stories </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/pt_br/about/ads/"> Anúncios em AMP </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/pt_br/about/email/"> E-mail AMP </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/pt_br/about/how-amp-works/"> Como a AMP funciona </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/pt_br/about/mission-and-vision/"> Visão e missão </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/pt_br/about/use-cases/"> Casos de uso </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/pt_br/success-stories/"> Histórias de sucesso </a> </li> </ul> </li> <li class="-tp"> <label class="ap-o-burger-menu-link -tw "> Documentação </label> <input class="-td" type="checkbox" aria-label="Documentation"> <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="/pt_br/documentation/"> Começar </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/pt_br/documentation/guides-and-tutorials/"> Guias e tutoriais </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/pt_br/documentation/components/"> Componentes </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/pt_br/documentation/examples/"> Exemplos </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/pt_br/documentation/courses/"> Cursos </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/pt_br/documentation/templates/"> Modelos </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/pt_br/documentation/tools/"> Ferramentas </a> </li> </ul> </li> <li class="-tp"> <label class="ap-o-burger-menu-link -tw "> Comunidade </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="/pt_br/documentation/guides-and-tutorials/contribute/"> Contribuir </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/pt_br/community/roadmap/"> Roteiro </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/pt_br/community/governance/"> Governança </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/pt_br/community/working-groups/access-subscriptions/"> Grupos de trabalho </a> </li> </ul> </li> <li class="-tp"> <label class="ap-o-burger-menu-link -tw "> Eventos </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="/pt_br/events/amp-fest-2020/"> AMP Fest 2020 </a> </li> <li class="-tp"> <a class="ap-o-burger-menu-link -tx" href="/pt_br/events/amp-roadshow/"> Roadshow AMP </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="/pt_br/support/"> Ajuda </a> </li> </ul> </nav> <div class="-ui"> <amp-position-observer on="enter:slideTransition.start; exit:slideTransition.start,slideTransition.reverse" intersection-ratios="1" layout="nodisplay" class="i-amphtml-layout-nodisplay" hidden="hidden" i-amphtml-layout="nodisplay"> </amp-position-observer> <amp-animation id="slideTransition" layout="nodisplay" class="i-amphtml-layout-nodisplay" hidden="hidden" i-amphtml-layout="nodisplay"> <script type="application/json">{"duration":"150ms","fill":"both","easing":"ease-out","iterations":"1","animations":[{"selector":".label-title","keyframes":[{"transform":"scale3d(0, 1, 1)"},{"transform":"scale3d(1, 1, 1)"}]}]}</script> </amp-animation> </div> <amp-user-notification class="-ll i-amphtml-layout-nodisplay" id="format-filter-hint" layout="nodisplay" hidden="hidden" i-amphtml-layout="nodisplay"> </amp-user-notification> <div class="-lf" aria-hidden="true"> <div class="-lc"> <div class="-lh">Selecione seu formato para uma experiência mais simplificada</div> <button class="-lp" on="tap:format-filter-hint.dismiss"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#close"/></svg> </button> </div> </div> <main class="ap--main -ft"> <div class="-tf"> <input class="-uu ap-a-sidebar-mobile-toggle-input-sidebar" type="checkbox" name="sidebar" id="sidebar" autocomplete="off"> <input class="-uf ap-a-sidebar-desktop-toggle-input-sidebar" type="checkbox" name="sidebar-desktop" id="sidebar-desktop" autocomplete="off"> <span id="ap--sidebar-content" class="-uc"></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">Índice</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="-us -un" type="checkbox" name="toc" id="toc" autocomplete="off"> <ul><li><a href="#srcset">srcset</a></li> <li><a href="#sizes">sizes</a></li> <li><a href="#heights">heights</a></li></ul> </div> </section> <section class="-t"> <label class="-uo -ur 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">Alternar barra lateral</span> </label> <label class="-uo -ul 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">Alternar barra lateral</span> </label> <nav class="-ue"> <a class="ap-m-breadcrumbs-crumb" href="/pt_br/documentation/">Documentação</a> <span class="ap-m-breadcrumbs-divider"> <svg class="ap-a-ico -ut"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-solid"/></svg> </span> <a class="ap-m-breadcrumbs-crumb" href="/pt_br/documentation/guides-and-tutorials/">Guias e tutoriais</a> <span class="ap-m-breadcrumbs-divider"> <svg class="ap-a-ico -ut"><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#angle-down-solid"/></svg> </span> <div class="ap-m-breadcrumbs-crumb">Style & Layout</div> </nav> <h1>Responsive images with srcset, sizes & heights</h1> <h2 id="srcset">srcset</h2> <p>Use o atributo <code>srcset</code> para controlar os recursos de um elemento com base em várias expressões de mídia. Use esse atributo principalmente para todas as tags <a href="/pt_br/documentation/components/amp-img/"><code>amp-img</code></a> a fim de especificar quais recursos de imagem usar com base nos vários tamanhos de tela. O AMP irá gerar automaticamente o atributo <code>sizes</code>, <a> que está de acordo com a definição do HTML5 de <code>sizes</code></a>, para todas as tags <code><img></code> de <code><amp-img></code> se o <code><amp-img></code> tiver um atributo <code>srcset</code> mas nenhum <code>sizes</code>.</p> <p>Neste exemplo simples, o <code>srcset</code> especifica qual imagem usar com base na largura da tela. O descritor <code>w</code> informa ao navegador a largura de cada imagem na lista:</p><div class="ap-code-preview top-frame"> <amp-state id="orientation1" class="i-amphtml-layout-container" i-amphtml-layout="container"> <script type="application/json">true</script> </amp-state> <amp-state id="dimension1" class="i-amphtml-layout-container" i-amphtml-layout="container"> <script type="application/json">{"width":533,"height":300}</script> </amp-state> <amp-state id="example1" class="i-amphtml-layout-container" i-amphtml-layout="container"> <script type="application/json">"https://preview.amp.dev/pt_br/documentation/guides-and-tutorials/develop/style_and_layout/art_direction.example.1.html"</script> </amp-state> <div class="ap-code-preview-top-preview ap-code-preview-top-preview-1"> <div class="ap-code-preview-controls"> <button [hidden]="!orientation1" class="ap-code-preview-controls-button" on="tap: AMP.setState({ orientation1: true, dimension1: { width: dimension1.height, height: dimension1.width, } })" i-amphtml-binding> <div class="ap-a-ico ap-code-preview-controls-icon"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#orientation-toggle"/></svg> </div> </button> <button class="ap-code-preview-controls-button" on="tap:AMP.setState({'example1': 'https://preview.amp.dev/pt_br/documentation/guides-and-tutorials/develop/style_and_layout/art_direction.example.1.html?' + random()})"> <div class="ap-a-ico ap-code-preview-controls-icon"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#reload"/></svg> </div> </button> </div> <amp-iframe id="iframeContainer1" class="ap-code-preview-iframe i-amphtml-layout-intrinsic i-amphtml-layout-size-defined" src="https://preview.amp.dev/pt_br/documentation/guides-and-tutorials/develop/style_and_layout/art_direction.example.1.html" layout="intrinsic" width="533" [width]="dimension1.width" height="300" [height]="dimension1.height" [src]="example1" sandbox="allow-scripts allow-popups allow-same-origin" frameborder="0" i-amphtml-binding i-amphtml-layout="intrinsic"><i-amphtml-sizer slot="i-amphtml-svc" class="i-amphtml-sizer"><img alt aria-hidden="true" class="i-amphtml-intrinsic-sizer" role="presentation" src="data:image/svg+xml;base64,PHN2ZyBoZWlnaHQ9IjMwMCIgd2lkdGg9IjUzMyIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiB2ZXJzaW9uPSIxLjEiLz4="></i-amphtml-sizer> <div placeholder></div> </amp-iframe> </div> <div class="-ta"><pre><span></span><code><span class="p"><</span><span class="nt">amp-img</span> <span class="na">alt</span><span class="o">=</span><span class="s">"Hummingbird"</span> <span class="na">src</span><span class="o">=</span><span class="s">"/static/inline-examples/images/hummingbird-wide.jpg"</span> <span class="na">width</span><span class="o">=</span><span class="s">"640"</span> <span class="na">height</span><span class="o">=</span><span class="s">"457"</span> <span class="na">layout</span><span class="o">=</span><span class="s">"responsive"</span> <span class="na">srcset</span><span class="o">=</span><span class="s">"/static/inline-examples/images/hummingbird-wide.jpg 640w,</span> <span class="s"> /static/inline-examples/images/hummingbird-narrow.jpg 320w"</span> <span class="p">></span> <span class="p"></</span><span class="nt">amp-img</span><span class="p">></span> </code></pre></div> </div> <a href="https://playground.amp.dev/?url=https%3A//preview.amp.dev/pt_br/documentation/guides-and-tutorials/develop/style_and_layout/art_direction.example.1.html%3Fformat%3Dwebsites" class="-n -cn"> <div class="ap-a-ico -i"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#internal"/></svg> </div> <span class="-r">Abrir este trecho no playground</span> </a> <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>OBSERVAÇÃO –</strong> O AMP oferecem suporte ao atributo srcset com o descritor <code>w</code> em todos os navegadores. </div> </div><p></p> <p>Saiba mais sobre como criar imagens responsivas com o <code>srcset</code> em <a href="http://alistapart.com/article/using-responsive-images-now">Como Usar Imagens Responsivas (Agora)</a>.</p> <h2 id="sizes">sizes</h2> <p>Também é possível usar o atributo AMP opcional <code>sizes</code> junto com <code>srcset</code>. O atributo AMP <code>sizes</code> descreve como calcular o tamanho do elemento com base em qualquer expressão de mídia. <strong>A definição de <code>sizes</code> em qualquer elemento AMP fará com que o AMP defina um estilo inline para a largura (width) naquele elemento de acordo com a media query correspondente.</strong> Baseado no tamanho calculado do elemento, o navegador seleciona a origem mais relativa fornecida pelo atributo <code>srcset</code>.</p> <p>Veja o seguinte exemplo:</p><div class="ap-code-preview top-frame"> <amp-state id="orientation2" class="i-amphtml-layout-container" i-amphtml-layout="container"> <script type="application/json">true</script> </amp-state> <amp-state id="dimension2" class="i-amphtml-layout-container" i-amphtml-layout="container"> <script type="application/json">{"width":533,"height":300}</script> </amp-state> <amp-state id="example2" class="i-amphtml-layout-container" i-amphtml-layout="container"> <script type="application/json">"https://preview.amp.dev/pt_br/documentation/guides-and-tutorials/develop/style_and_layout/art_direction.example.2.html"</script> </amp-state> <div class="ap-code-preview-top-preview ap-code-preview-top-preview-2"> <div class="ap-code-preview-controls"> <button [hidden]="!orientation2" class="ap-code-preview-controls-button" on="tap: AMP.setState({ orientation2: true, dimension2: { width: dimension2.height, height: dimension2.width, } })" i-amphtml-binding> <div class="ap-a-ico ap-code-preview-controls-icon"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#orientation-toggle"/></svg> </div> </button> <button class="ap-code-preview-controls-button" on="tap:AMP.setState({'example2': 'https://preview.amp.dev/pt_br/documentation/guides-and-tutorials/develop/style_and_layout/art_direction.example.2.html?' + random()})"> <div class="ap-a-ico ap-code-preview-controls-icon"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#reload"/></svg> </div> </button> </div> <amp-iframe id="iframeContainer2" class="ap-code-preview-iframe i-amphtml-layout-intrinsic i-amphtml-layout-size-defined" src="https://preview.amp.dev/pt_br/documentation/guides-and-tutorials/develop/style_and_layout/art_direction.example.2.html" layout="intrinsic" width="533" [width]="dimension2.width" height="300" [height]="dimension2.height" [src]="example2" sandbox="allow-scripts allow-popups allow-same-origin" frameborder="0" i-amphtml-binding i-amphtml-layout="intrinsic"><i-amphtml-sizer slot="i-amphtml-svc" class="i-amphtml-sizer"><img alt aria-hidden="true" class="i-amphtml-intrinsic-sizer" role="presentation" src="data:image/svg+xml;base64,PHN2ZyBoZWlnaHQ9IjMwMCIgd2lkdGg9IjUzMyIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiB2ZXJzaW9uPSIxLjEiLz4="></i-amphtml-sizer> <div placeholder></div> </amp-iframe> </div> <div class="-ta"><pre><span></span><code><span class="p"><</span><span class="nt">amp-img</span> <span class="na">alt</span><span class="o">=</span><span class="s">"Hummingbird"</span> <span class="na">src</span><span class="o">=</span><span class="s">"/static/inline-examples/images/hummingbird-wide.jpg"</span> <span class="na">width</span><span class="o">=</span><span class="s">"640"</span> <span class="na">height</span><span class="o">=</span><span class="s">"457"</span> <span class="na">srcset</span><span class="o">=</span><span class="s">"/static/inline-examples/images/hummingbird-wide.jpg 640w,</span> <span class="s"> /static/inline-examples/images/hummingbird-narrow.jpg 320w"</span> <span class="na">sizes</span><span class="o">=</span><span class="s">"(min-width: 650px) 50vw, 100vw"</span> <span class="p">></span> <span class="p"></</span><span class="nt">amp-img</span><span class="p">></span> </code></pre></div> </div> <a href="https://playground.amp.dev/?url=https%3A//preview.amp.dev/pt_br/documentation/guides-and-tutorials/develop/style_and_layout/art_direction.example.2.html%3Fformat%3Dwebsites" class="-n -cn"> <div class="ap-a-ico -i"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#internal"/></svg> </div> <span class="-r">Abrir este trecho no playground</span> </a> <p>O atributo <code>sizes</code> define a largura do elemento como 50% do tamanho da janela de visualização, quando ela tiver 650px ou mais. Por exemplo, se a janela de visualização tiver 800px, a largura do elemento será definida como 400px. Em seguida, o navegador seleciona o recurso <code>srcset</code> relativo a 400px, assumindo que a proporção de pixels do dispositivo seja 1, que neste caso é <code>hummingbird-narrow.jpg</code> (320px).</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>IMPORTANTE –</strong>Quando o atributo sizes for especificado juntamente com width e height, o layout será <code>responsive</code> por default. </div> </div><p></p> <p>Saiba mais sobre os atributo <a>AMP <code data-md-type="codespan">sizes</code> aqui</a></p> <h2 id="heights">heights</h2> <p>Todos os elementos personalizados da AMP que permitem o layout <code>responsive</code> também são compatíveis com o atributo <code>heights</code>. O valor desse atributo é uma expressão de sizes baseada em expressões de mídia semelhante ao <a href="https://developer.mozilla.org/en-US/docs/Web/HTML/Element/img">atributo img sizes</a>, mas com duas diferenças importantes:</p> <ol> <li>Ele se aplica à altura e não à largura do elemento.</li> <li>Valores percentuais são permitidos, por exemplo: <code>86%</code>. Se um valor percentual for usado, ele indicará a porcentagem da largura do elemento.</li> </ol> <p>Quando o atributo <code>heights</code> for especificado juntamente com <code>width</code> e <code>height</code>, o <code>layout</code> será <code>responsive</code>, por default.</p> <p>Exemplo:</p><div class="ap-code-preview top-frame"> <amp-state id="orientation3" class="i-amphtml-layout-container" i-amphtml-layout="container"> <script type="application/json">true</script> </amp-state> <amp-state id="dimension3" class="i-amphtml-layout-container" i-amphtml-layout="container"> <script type="application/json">{"width":533,"height":300}</script> </amp-state> <amp-state id="example3" class="i-amphtml-layout-container" i-amphtml-layout="container"> <script type="application/json">"https://preview.amp.dev/pt_br/documentation/guides-and-tutorials/develop/style_and_layout/art_direction.example.3.html"</script> </amp-state> <div class="ap-code-preview-top-preview ap-code-preview-top-preview-3"> <div class="ap-code-preview-controls"> <button [hidden]="!orientation3" class="ap-code-preview-controls-button" on="tap: AMP.setState({ orientation3: true, dimension3: { width: dimension3.height, height: dimension3.width, } })" i-amphtml-binding> <div class="ap-a-ico ap-code-preview-controls-icon"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#orientation-toggle"/></svg> </div> </button> <button class="ap-code-preview-controls-button" on="tap:AMP.setState({'example3': 'https://preview.amp.dev/pt_br/documentation/guides-and-tutorials/develop/style_and_layout/art_direction.example.3.html?' + random()})"> <div class="ap-a-ico ap-code-preview-controls-icon"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#reload"/></svg> </div> </button> </div> <amp-iframe id="iframeContainer3" class="ap-code-preview-iframe i-amphtml-layout-intrinsic i-amphtml-layout-size-defined" src="https://preview.amp.dev/pt_br/documentation/guides-and-tutorials/develop/style_and_layout/art_direction.example.3.html" layout="intrinsic" width="533" [width]="dimension3.width" height="300" [height]="dimension3.height" [src]="example3" sandbox="allow-scripts allow-popups allow-same-origin" frameborder="0" i-amphtml-binding i-amphtml-layout="intrinsic"><i-amphtml-sizer slot="i-amphtml-svc" class="i-amphtml-sizer"><img alt aria-hidden="true" class="i-amphtml-intrinsic-sizer" role="presentation" src="data:image/svg+xml;base64,PHN2ZyBoZWlnaHQ9IjMwMCIgd2lkdGg9IjUzMyIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiB2ZXJzaW9uPSIxLjEiLz4="></i-amphtml-sizer> <div placeholder></div> </amp-iframe> </div> <div class="-ta"><pre><span></span><code><span class="p"><</span><span class="nt">amp-img</span> <span class="na">alt</span><span class="o">=</span><span class="s">"AMP"</span> <span class="na">src</span><span class="o">=</span><span class="s">"/static/inline-examples/images/amp.jpg"</span> <span class="na">width</span><span class="o">=</span><span class="s">"320"</span> <span class="na">height</span><span class="o">=</span><span class="s">"256"</span> <span class="na">heights</span><span class="o">=</span><span class="s">"(min-width:500px) 200px, 80%"</span> <span class="p">></span> <span class="p"></</span><span class="nt">amp-img</span><span class="p">></span> </code></pre></div> </div> <a href="https://playground.amp.dev/?url=https%3A//preview.amp.dev/pt_br/documentation/guides-and-tutorials/develop/style_and_layout/art_direction.example.3.html%3Fformat%3Dwebsites" class="-n -cn"> <div class="ap-a-ico -i"> <svg><use xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="#internal"/></svg> </div> <span class="-r">Abrir este trecho no playground</span> </a> <p>Neste exemplo, a altura do elemento será 80% da largura por default, mas para as janelas de visualização maiores que <code>500px</code>, ela será truncada em <code>200px</code>.</p> </section> <section class="-t"> <hr> <ul class="ap-o-mini-card-list"> <li class="ap-o-mini-card-list-item"> <div class="ap-m-mini-card"> <amp-img alt="Author avatar" src="https://github.com/pbakaus.png?size=38" width="38" height="38" class="large i-amphtml-layout-responsive i-amphtml-layout-size-defined" style="max-width: 38px" layout="responsive" i-amphtml-layout="responsive"><i-amphtml-sizer slot="i-amphtml-svc" style="display:block;padding-top:100%"></i-amphtml-sizer> </amp-img> <span> <strong>Written by <a href="https://github.com/pbakaus" rel="nofollow" target="_blank"> @pbakaus </a> </strong> <br> <small> with contributions from <strong> <a href="https://github.com/bpaduch" rel="nofollow" target="_blank"> @bpaduch </a> </strong> </small> </span> </div></li> </ul> </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="/pt_br/documentation/guides-and-tutorials/stories/develop/style_and_layout/art_direction/"> <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="/pt_br/documentation/guides-and-tutorials/ads/develop/style_and_layout/art_direction/"> <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="/pt_br/documentation/guides-and-tutorials/email/develop/style_and_layout/art_direction/"> <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 level-1"> <span class="nav-link"> <span>Iniciar</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="/pt_br/documentation/guides-and-tutorials/websites/start/create/"> <span>Criar sua primeira página</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"> <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="/pt_br/documentation/guides-and-tutorials/websites/start/create/basic_markup/"> Crie sua página AMPHTML </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/pt_br/documentation/guides-and-tutorials/websites/start/create/include_image/"> Inclua uma imagem </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/pt_br/documentation/guides-and-tutorials/websites/start/create/presentation_layout/"> Modify presentation and layout </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/pt_br/documentation/guides-and-tutorials/websites/start/create/prepare_for_discovery/"> Prepare your page for discovery and distribution </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/pt_br/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="/pt_br/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="/pt_br/documentation/guides-and-tutorials/websites/start/create/publish/"> Final steps before publishing </a> </li> </ul> </li> <li class="nav-item-tutorial-divider"></li> <li class="nav-item level-2"> <a class="nav-link" href="/pt_br/documentation/guides-and-tutorials/websites/start/converting/"> <span>Converter HTML em</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"> <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="/pt_br/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 "></div> <a class="nav-link" href="/pt_br/documentation/guides-and-tutorials/websites/start/converting/building-page/"> Building a regular HTML page </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/pt_br/documentation/guides-and-tutorials/websites/start/converting/resolving-errors/"> Corrigir erros de validação </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/pt_br/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="/pt_br/documentation/guides-and-tutorials/websites/start/converting/congratulations/"> Congratulations! </a> </li> </ul> </li> <li class="nav-item level-2"> <a class="nav-link" href="/pt_br/documentation/guides-and-tutorials/websites/start/add_advanced/"> <span>Adicionar recursos de AMP</span> <span class="nav-link-lastword">avançados<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="/pt_br/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="/pt_br/documentation/guides-and-tutorials/websites/start/add_advanced/review_code/"> Revisão do código inicial </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/pt_br/documentation/guides-and-tutorials/websites/start/add_advanced/adding_components/"> Adicionar componentes estendidos de AMP </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/pt_br/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="/pt_br/documentation/guides-and-tutorials/websites/start/add_advanced/tracking_data/"> Acompanhe o envolvimento com análises </a> </li> <li class="nav-item level-3"> <div class="ap-m-tutorial-progress "></div> <a class="nav-link" href="/pt_br/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="/pt_br/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="/pt_br/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>Aprender</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="/pt_br/documentation/guides-and-tutorials/websites/learn/amp-actions-and-events/"> Ações e eventos </a> </li> <li class="nav-item level-2"> <a class="nav-link" href="/pt_br/documentation/guides-and-tutorials/websites/learn/common_attributes/"> Atributos comuns </a> </li> <li class="nav-item level-2"> <span class="nav-link"> <span>Especificações de HTML para AMP</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="/pt_br/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="/pt_br/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="/pt_br/documentation/guides-and-tutorials/websites/learn/spec/amphtml/"> AMP HTML Specification </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/pt_br/documentation/guides-and-tutorials/websites/learn/spec/amp-boilerplate/"> Código AMP Boilerplate </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/pt_br/documentation/guides-and-tutorials/websites/learn/spec/release-schedule/"> Cronograma de lançamento do AMP </a> </li> </ul> </li> <li class="nav-item level-2"> <a class="nav-link" href="/pt_br/documentation/guides-and-tutorials/websites/learn/experimental/"> Recursos experimentais </a> </li> <li class="nav-item level-2"> <a class="nav-link" href="/pt_br/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="/pt_br/documentation/guides-and-tutorials/websites/learn/amp-html-layout/"> Sistema de layout do AMPHTML </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/pt_br/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>Fluxo de trabalho de validação</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="/pt_br/documentation/guides-and-tutorials/websites/learn/validation-workflow/validation_errors/"> Erros de validação das AMP </a> </li> </ul> </li> <li class="nav-item level-2"> <span class="nav-link"> <span>Caches de AMP e 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="/pt_br/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="/pt_br/documentation/guides-and-tutorials/websites/learn/amp-caches-and-cors/how_amp_pages_are_cached/"> Como páginas AMP são armazenadas em cache </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/pt_br/documentation/guides-and-tutorials/websites/learn/amp-caches-and-cors/amp-cache-debugging/"> Depuração de problemas de cache do AMP </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/pt_br/documentation/guides-and-tutorials/websites/learn/amp-caches-and-cors/amp-cache-urls/"> Formato da URL do Cache do AMP e tratamento de solicitações </a> </li> </ul> </li> <li class="nav-item level-2"> <a class="nav-link" href="/pt_br/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 active level-1"> <span class="nav-link"> <span>Desenvolver</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 active level-2"> <a class="nav-link" href="/pt_br/documentation/guides-and-tutorials/websites/develop/style_and_layout/"> <span>Estilo e layout</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"> <a class="nav-link" href="/pt_br/documentation/guides-and-tutorials/websites/develop/style_and_layout/style_pages/"> CSS compatível </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/pt_br/documentation/guides-and-tutorials/websites/develop/style_and_layout/control_layout/"> Consultas de mídia e layout </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/pt_br/documentation/guides-and-tutorials/websites/develop/style_and_layout/placeholders/"> Placeholders e fallbacks </a> </li> <li class="nav-item active level-3" autoscroll> <a class="nav-link" href="/pt_br/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="/pt_br/documentation/guides-and-tutorials/websites/develop/style_and_layout/responsive_design/"> Criar páginas AMP responsivas </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/pt_br/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="/pt_br/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="/pt_br/documentation/guides-and-tutorials/websites/develop/media_iframes_3p/"> Incluir imagens e vídeo </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/pt_br/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="/pt_br/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="/pt_br/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="/pt_br/documentation/guides-and-tutorials/websites/develop/interactivity_guide/foundations/"> Interactivity foundations </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/pt_br/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="/pt_br/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="/pt_br/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>Animação e transição</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="/pt_br/documentation/guides-and-tutorials/websites/develop/animations/triggering_css_animations/"> Acionando animações e transições CSS </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/pt_br/documentation/guides-and-tutorials/websites/develop/animations/introduction_to_animations/"> Introdução a animações complexas </a> </li> </ul> </li> <li class="nav-item level-2"> <a class="nav-link" href="/pt_br/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="/pt_br/documentation/guides-and-tutorials/websites/develop/monetization/"> <span>Monetização de páginas AMP com anúncios</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="/pt_br/documentation/guides-and-tutorials/websites/develop/monetization/ads_vendors/"> Ads vendors </a> </li> <li class="nav-item level-3"> <a class="nav-link" href="/pt_br/documentation/guides-and-tutorials/websites/develop/monetization/content_encryption/"> Proteja o conteúdo de suas assinaturas com criptografia lado-cliente </a> </li> </ul> </li> <li class="nav-item-tutorial-divider"></li> <li class="nav-item level-2"> <a class="nav-link" href="/pt_br/documentation/guides-and-tutorials/websites/develop/interactivity/"> <span>Criação de páginas AMP</span> <span class="nav-link-lastword">interativas<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 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