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<ol class="chapter"><li class="chapter-item expanded affix "><a href="../index.html">Introdução</a></li><li class="chapter-item expanded "><a href="../getting_started/index.html"><strong aria-hidden="true">1.</strong> Introdução Rápida as Plataformas</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../getting_started/desktop.html"><strong aria-hidden="true">1.1.</strong> Desktop</a></li><li class="chapter-item expanded "><a href="../getting_started/web.html"><strong aria-hidden="true">1.2.</strong> Web</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../getting_started/hot_reload.html"><strong aria-hidden="true">1.2.1.</strong> Hot Reload</a></li></ol></li><li class="chapter-item expanded "><a href="../getting_started/ssr.html"><strong aria-hidden="true">1.3.</strong> Renderização por Servidor</a></li><li class="chapter-item expanded "><a href="../getting_started/tui.html"><strong aria-hidden="true">1.4.</strong> Interface do Terminal</a></li><li class="chapter-item expanded "><a href="../getting_started/mobile.html"><strong aria-hidden="true">1.5.</strong> Móvel</a></li></ol></li><li class="chapter-item expanded "><a href="../describing_ui/index.html"><strong aria-hidden="true">2.</strong> Descrevendo a Interface do Usuário</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../describing_ui/special_attributes.html"><strong aria-hidden="true">2.1.</strong> Atributos Especiais</a></li><li class="chapter-item expanded "><a href="../describing_ui/components.html"><strong aria-hidden="true">2.2.</strong> Componentes</a></li><li class="chapter-item expanded "><a href="../describing_ui/component_props.html"><strong aria-hidden="true">2.3.</strong> Props</a></li><li class="chapter-item expanded "><a href="../describing_ui/component_children.html" class="active"><strong aria-hidden="true">2.4.</strong> Componente Filho</a></li></ol></li><li class="chapter-item expanded "><a href="../interactivity/index.html"><strong aria-hidden="true">3.</strong> Interatividade</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../interactivity/event_handlers.html"><strong aria-hidden="true">3.1.</strong> Manipuladores de Eventos</a></li><li class="chapter-item expanded "><a href="../interactivity/hooks.html"><strong aria-hidden="true">3.2.</strong> Hooks & Estado de Componentes</a></li><li class="chapter-item expanded "><a href="../interactivity/user_input.html"><strong aria-hidden="true">3.3.</strong> Entradas do Usuário</a></li><li class="chapter-item expanded "><a href="../interactivity/sharing_state.html"><strong aria-hidden="true">3.4.</strong> Estado Compartilhado</a></li><li class="chapter-item expanded "><a href="../interactivity/custom_hooks.html"><strong aria-hidden="true">3.5.</strong> Hooks Personalizados</a></li><li class="chapter-item expanded "><a href="../interactivity/dynamic_rendering.html"><strong aria-hidden="true">3.6.</strong> Renderização Dinâmica</a></li><li class="chapter-item expanded "><a href="../interactivity/roteador.html"><strong aria-hidden="true">3.7.</strong> Roteamento</a></li></ol></li><li class="chapter-item expanded "><a href="../async/index.html"><strong aria-hidden="true">4.</strong> Assincronia</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../async/use_future.html"><strong aria-hidden="true">4.1.</strong> UseFuture</a></li><li class="chapter-item expanded "><a href="../async/use_coroutine.html"><strong aria-hidden="true">4.2.</strong> UseCoroutine</a></li><li class="chapter-item expanded "><a href="../async/spawn.html"><strong aria-hidden="true">4.3.</strong> Gerando Futures</a></li></ol></li><li class="chapter-item expanded "><a href="../best_practices/index.html"><strong aria-hidden="true">5.</strong> Práticas Recomendadas</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../best_practices/error_handling.html"><strong aria-hidden="true">5.1.</strong> Tratamento de erros</a></li><li class="chapter-item expanded "><a href="../best_practices/antipatterns.html"><strong aria-hidden="true">5.2.</strong> Antipadrões</a></li></ol></li><li class="chapter-item expanded "><a href="../publishing/index.html"><strong aria-hidden="true">6.</strong> Publicação</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../publishing/desktop.html"><strong aria-hidden="true">6.1.</strong> Desktop</a></li><li class="chapter-item expanded "><a href="../publishing/web.html"><strong aria-hidden="true">6.2.</strong> Web</a></li><li class="spacer"></li></ol></li><li class="chapter-item expanded "><a href="../custom_renderer/index.html"><strong aria-hidden="true">7.</strong> Renderizador Personalizado</a></li><li class="spacer"></li><li class="chapter-item expanded affix "><a href="../roadmap.html">Roteiro</a></li><li class="chapter-item expanded affix "><a href="../contributing.html">Contribuindo</a></li></ol>
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<main>
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<h1 id="componente-filhos"><a class="header" href="#componente-filhos">Componente Filhos</a></h1>
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<p>Em alguns casos, você pode desejar criar um componente que atue como um contêiner para algum outro conteúdo, sem que o componente precise saber qual é esse conteúdo. Para conseguir isso, crie uma <em>prop</em> do tipo <code>Element</code>:</p>
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<pre><pre class="playground"><code class="language-rust edition2018">
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<span class="boring">#![allow(unused)]
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</span><span class="boring">fn main() {
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</span>#[derive(Props)]
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struct ClickableProps<'a> {
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href: &'a str,
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body: Element<'a>,
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}
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fn Clickable<'a>(cx: Scope<'a, ClickableProps<'a>>) -> Element {
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cx.render(rsx!(
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a {
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href: "{cx.props.href}",
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class: "fancy-button",
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&cx.props.body
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}
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))
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}
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<span class="boring">}
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</span></code></pre></pre>
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<p>Então, ao renderizar o componente, você pode passar a saída de <code>cx.render(rsx!(...))</code>:</p>
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<pre><pre class="playground"><code class="language-rust edition2018">
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<span class="boring">#![allow(unused)]
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</span><span class="boring">fn main() {
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</span> cx.render(rsx! {
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Clickable {
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href: "https://www.youtube.com/watch?v=C-M2hs3sXGo",
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body: cx.render(rsx!("How to " i {"not"} " be seen")),
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}
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})
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<span class="boring">}
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</span></code></pre></pre>
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<blockquote>
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<p>Nota: Como <code>Element<'a></code> é uma <em>prop</em> emprestado, não haverá memoização.</p>
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</blockquote>
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<blockquote>
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<p>Atenção: Embora possa compilar, não inclua o mesmo <code>Element</code> mais de uma vez no RSX. O comportamento resultante não é especificado.</p>
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</blockquote>
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<h2 id="o-campo-children"><a class="header" href="#o-campo-children">O Campo <code>children</code></a></h2>
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<p>Em vez de passar o <code>RSX</code> através de uma <em>prop</em> regular, você pode querer aceitar filhos da mesma forma que os elementos podem ter filhos. O prop "mágico" <code>children</code> permite que você consiga isso:</p>
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<pre><pre class="playground"><code class="language-rust edition2018">
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<span class="boring">#![allow(unused)]
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</span><span class="boring">fn main() {
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</span>#[derive(Props)]
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struct ClickableProps<'a> {
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href: &'a str,
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children: Element<'a>,
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}
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fn Clickable<'a>(cx: Scope<'a, ClickableProps<'a>>) -> Element {
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cx.render(rsx!(
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a {
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href: "{cx.props.href}",
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class: "fancy-button",
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&cx.props.children
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}
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))
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}
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<span class="boring">}
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</span></code></pre></pre>
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<p>Isso torna o uso do componente muito mais simples: basta colocar o <code>RSX</code> dentro dos colchetes <code>{}</code> – e não há necessidade de uma chamada <code>render</code> ou outra macro!</p>
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<pre><pre class="playground"><code class="language-rust edition2018">
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<span class="boring">#![allow(unused)]
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</span><span class="boring">fn main() {
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</span> cx.render(rsx! {
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Clickable {
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href: "https://www.youtube.com/watch?v=C-M2hs3sXGo",
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"How to " i {"not"} " be seen"
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||
}
|
||
})
|
||
<span class="boring">}
|
||
</span></code></pre></pre>
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