lenn
/
dioxus-mirror
spegling av https://github.com/DioxusLabs/dioxus.git


			
							123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286
							<!DOCTYPE HTML>
<html lang="en" class="sidebar-visible no-js light">
    <head>
        <!-- Book generated using mdBook -->
        <meta charset="UTF-8">
        <title>Special Attributes</title>


        <!-- Custom HTML head -->
        
        <meta content="text/html; charset=utf-8" http-equiv="Content-Type">
        <meta name="description" content="">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <meta name="theme-color" content="#ffffff" />

        <link rel="icon" href="../favicon.svg">
        <link rel="shortcut icon" href="../favicon.png">
        <link rel="stylesheet" href="../css/variables.css">
        <link rel="stylesheet" href="../css/general.css">
        <link rel="stylesheet" href="../css/chrome.css">
        <link rel="stylesheet" href="../css/print.css" media="print">

        <!-- Fonts -->
        <link rel="stylesheet" href="../FontAwesome/css/font-awesome.css">
        <link rel="stylesheet" href="../fonts/fonts.css">

        <!-- Highlight.js Stylesheets -->
        <link rel="stylesheet" href="../highlight.css">
        <link rel="stylesheet" href="../tomorrow-night.css">
        <link rel="stylesheet" href="../ayu-highlight.css">

        <!-- Custom theme stylesheets -->

        <!-- MathJax -->
        <script async type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script>
    </head>
    <body>
        <!-- Provide site root to javascript -->
        <script type="text/javascript">
            var path_to_root = "../";
            var default_theme = window.matchMedia("(prefers-color-scheme: dark)").matches ? "navy" : "light";
        </script>

        <!-- Work around some values being stored in localStorage wrapped in quotes -->
        <script type="text/javascript">
            try {
                var theme = localStorage.getItem('mdbook-theme');
                var sidebar = localStorage.getItem('mdbook-sidebar');

                if (theme.startsWith('"') && theme.endsWith('"')) {
                    localStorage.setItem('mdbook-theme', theme.slice(1, theme.length - 1));
                }

                if (sidebar.startsWith('"') && sidebar.endsWith('"')) {
                    localStorage.setItem('mdbook-sidebar', sidebar.slice(1, sidebar.length - 1));
                }
            } catch (e) { }
        </script>

        <!-- Set the theme before any content is loaded, prevents flash -->
        <script type="text/javascript">
            var theme;
            try { theme = localStorage.getItem('mdbook-theme'); } catch(e) { }
            if (theme === null || theme === undefined) { theme = default_theme; }
            var html = document.querySelector('html');
            html.classList.remove('no-js')
            html.classList.remove('light')
            html.classList.add(theme);
            html.classList.add('js');
        </script>

        <!-- Hide / unhide sidebar before it is displayed -->
        <script type="text/javascript">
            var html = document.querySelector('html');
            var sidebar = 'hidden';
            if (document.body.clientWidth >= 1080) {
                try { sidebar = localStorage.getItem('mdbook-sidebar'); } catch(e) { }
                sidebar = sidebar || 'visible';
            }
            html.classList.remove('sidebar-visible');
            html.classList.add("sidebar-" + sidebar);
        </script>

        <nav id="sidebar" class="sidebar" aria-label="Table of contents">
            <div class="sidebar-scrollbox">
                <ol class="chapter"><li class="chapter-item expanded affix "><a href="../index.html">Introduction</a></li><li class="chapter-item expanded "><a href="../getting_started/index.html"><strong aria-hidden="true">1.</strong> Getting Started</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 class="chapter-item expanded "><a href="../getting_started/ssr.html"><strong aria-hidden="true">1.3.</strong> Server-Side Rendering</a></li><li class="chapter-item expanded "><a href="../getting_started/fullstack.html"><strong aria-hidden="true">1.4.</strong> Fullstack</a></li><li class="chapter-item expanded "><a href="../getting_started/liveview.html"><strong aria-hidden="true">1.5.</strong> Liveview</a></li><li class="chapter-item expanded "><a href="../getting_started/tui.html"><strong aria-hidden="true">1.6.</strong> Terminal UI</a></li><li class="chapter-item expanded "><a href="../getting_started/mobile.html"><strong aria-hidden="true">1.7.</strong> Mobile</a></li><li class="chapter-item expanded "><a href="../getting_started/hot_reload.html"><strong aria-hidden="true">1.8.</strong> Hot Reloading</a></li></ol></li><li class="chapter-item expanded "><a href="../describing_ui/index.html"><strong aria-hidden="true">2.</strong> Describing the UI</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../describing_ui/special_attributes.html" class="active"><strong aria-hidden="true">2.1.</strong> Special Attributes</a></li><li class="chapter-item expanded "><a href="../describing_ui/components.html"><strong aria-hidden="true">2.2.</strong> Components</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"><strong aria-hidden="true">2.4.</strong> Component Children</a></li></ol></li><li class="chapter-item expanded "><a href="../interactivity/index.html"><strong aria-hidden="true">3.</strong> Interactivity</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../interactivity/event_handlers.html"><strong aria-hidden="true">3.1.</strong> Event Listeners</a></li><li class="chapter-item expanded "><a href="../interactivity/hooks.html"><strong aria-hidden="true">3.2.</strong> Hooks &amp; Component State</a></li><li class="chapter-item expanded "><a href="../interactivity/user_input.html"><strong aria-hidden="true">3.3.</strong> User Input</a></li><li class="chapter-item expanded "><a href="../interactivity/sharing_state.html"><strong aria-hidden="true">3.4.</strong> Sharing State</a></li><li class="chapter-item expanded "><a href="../interactivity/custom_hooks.html"><strong aria-hidden="true">3.5.</strong> Custom Hooks</a></li><li class="chapter-item expanded "><a href="../interactivity/dynamic_rendering.html"><strong aria-hidden="true">3.6.</strong> Dynamic Rendering</a></li><li class="chapter-item expanded "><a href="../interactivity/router.html"><strong aria-hidden="true">3.7.</strong> Routing</a></li></ol></li><li class="chapter-item expanded "><a href="../async/index.html"><strong aria-hidden="true">4.</strong> Async</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> Spawning Futures</a></li></ol></li><li class="chapter-item expanded "><a href="../best_practices/index.html"><strong aria-hidden="true">5.</strong> Best Practices</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> Error Handling</a></li><li class="chapter-item expanded "><a href="../best_practices/antipatterns.html"><strong aria-hidden="true">5.2.</strong> Antipatterns</a></li></ol></li><li class="chapter-item expanded "><a href="../publishing/index.html"><strong aria-hidden="true">6.</strong> Publishing</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="../fullstack/index.html"><strong aria-hidden="true">7.</strong> Fullstack</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../fullstack/getting_started.html"><strong aria-hidden="true">7.1.</strong> Getting Started</a></li><li class="chapter-item expanded "><a href="../fullstack/server_functions.html"><strong aria-hidden="true">7.2.</strong> Communicating with the Server</a></li><li class="spacer"></li></ol></li><li class="chapter-item expanded "><a href="../custom_renderer/index.html"><strong aria-hidden="true">8.</strong> Custom Renderer</a></li><li class="spacer"></li><li class="chapter-item expanded "><a href="../contributing/index.html"><strong aria-hidden="true">9.</strong> Contributing</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../contributing/project_structure.html"><strong aria-hidden="true">9.1.</strong> Project Structure</a></li><li class="chapter-item expanded "><a href="../contributing/walkthrough_readme.html"><strong aria-hidden="true">9.2.</strong> Walkthrough of Internals</a></li><li class="chapter-item expanded "><a href="../contributing/guiding_principles.html"><strong aria-hidden="true">9.3.</strong> Guiding Principles</a></li><li class="chapter-item expanded "><a href="../contributing/roadmap.html"><strong aria-hidden="true">9.4.</strong> Roadmap</a></li></ol></li></ol>
            </div>
            <div id="sidebar-resize-handle" class="sidebar-resize-handle"></div>
        </nav>

        <div id="page-wrapper" class="page-wrapper">

            <div class="page">
                                <div id="menu-bar-hover-placeholder"></div>
                <div id="menu-bar" class="menu-bar sticky bordered">
                    <div class="left-buttons">
                        <button id="sidebar-toggle" class="icon-button" type="button" title="Toggle Table of Contents" aria-label="Toggle Table of Contents" aria-controls="sidebar">
                            <i class="fa fa-bars"></i>
                        </button>
                        <button id="theme-toggle" class="icon-button" type="button" title="Change theme" aria-label="Change theme" aria-haspopup="true" aria-expanded="false" aria-controls="theme-list">
                            <i class="fa fa-paint-brush"></i>
                        </button>
                        <ul id="theme-list" class="theme-popup" aria-label="Themes" role="menu">
                            <li role="none"><button role="menuitem" class="theme" id="light">Light (default)</button></li>
                            <li role="none"><button role="menuitem" class="theme" id="rust">Rust</button></li>
                            <li role="none"><button role="menuitem" class="theme" id="coal">Coal</button></li>
                            <li role="none"><button role="menuitem" class="theme" id="navy">Navy</button></li>
                            <li role="none"><button role="menuitem" class="theme" id="ayu">Ayu</button></li>
                        </ul>
                        <button id="search-toggle" class="icon-button" type="button" title="Search. (Shortkey: s)" aria-label="Toggle Searchbar" aria-expanded="false" aria-keyshortcuts="S" aria-controls="searchbar">
                            <i class="fa fa-search"></i>
                        </button>
                        <button id="language-toggle" class="icon-button" type="button" title="Select language" aria-label="Select language" aria-haspopup="true" aria-expanded="false" aria-controls="language-list">
                            <i class="fa fa-globe"></i>
                        </button>
                        <ul id="language-list" class="language-popup" aria-label="Languages" role="menu">
                            <li role="none"><a href="../../en/describing_ui/special_attributes.html"><button role="menuitem" class="language" id="light">English</button></a></li>
                            <li role="none"><a href="../../pt-br/describing_ui/special_attributes.html"><button role="menuitem" class="language" id="light">Português Brasileiro</button></a></li>
                        </ul>
                    </div>

                    <h1 class="menu-title"></h1>

                    <div class="right-buttons">
                        <a href="../print.html" title="Print this book" aria-label="Print this book">
                            <i id="print-button" class="fa fa-print"></i>
                        </a>
                        <a href="https://github.com/DioxusLabs/dioxus/edit/master/docs/guide" title="Git repository" aria-label="Git repository">
                            <i id="git-repository-button" class="fa fa-github"></i>
                        </a>
                        <a href="https://github.com/DioxusLabs/dioxus/edit/master/docs/guide/src/describing_ui/special_attributes.md" title="Suggest an edit" aria-label="Suggest an edit">
                            <i id="git-edit-button" class="fa fa-edit"></i>
                        </a>

                    </div>
                </div>

                <div id="search-wrapper" class="hidden">
                    <form id="searchbar-outer" class="searchbar-outer">
                        <input type="search" id="searchbar" name="searchbar" placeholder="Search this book ..." aria-controls="searchresults-outer" aria-describedby="searchresults-header">
                    </form>
                    <div id="searchresults-outer" class="searchresults-outer hidden">
                        <div id="searchresults-header" class="searchresults-header"></div>
                        <ul id="searchresults">
                        </ul>
                    </div>
                </div>

                <!-- Apply ARIA attributes after the sidebar and the sidebar toggle button are added to the DOM -->
                <script type="text/javascript">
                    document.getElementById('sidebar-toggle').setAttribute('aria-expanded', sidebar === 'visible');
                    document.getElementById('sidebar').setAttribute('aria-hidden', sidebar !== 'visible');
                    Array.from(document.querySelectorAll('#sidebar a')).forEach(function(link) {
                        link.setAttribute('tabIndex', sidebar === 'visible' ? 0 : -1);
                    });
                </script>

                <div id="content" class="content">
                    <main>
                        <h1 id="special-attributes"><a class="header" href="#special-attributes">Special Attributes</a></h1>
<p>While most attributes are simply passed on to the HTML, some have special behaviors.</p>
<h2 id="the-html-escape-hatch"><a class="header" href="#the-html-escape-hatch">The HTML Escape Hatch</a></h2>
<p>If you're working with pre-rendered assets, output from templates, or output from a JS library, then you might want to pass HTML directly instead of going through Dioxus. In these instances, reach for <code>dangerous_inner_html</code>.</p>
<p>For example, shipping a markdown-to-Dioxus converter might significantly bloat your final application size. Instead, you'll want to pre-render your markdown to HTML and then include the HTML directly in your output. We use this approach for the <a href="https://dioxuslabs.com">Dioxus homepage</a>:</p>
<pre><pre class="playground"><code class="language-rust edition2018">
<span class="boring">#![allow(unused)]
</span><span class="boring">fn main() {
</span>// this should come from a trusted source
let contents = &quot;live &lt;b&gt;dangerously&lt;/b&gt;&quot;;

cx.render(rsx! {
    div {
        dangerous_inner_html: &quot;{contents}&quot;,
    }
})
<span class="boring">}
</span></code></pre></pre>
<blockquote>
<p>Note! This attribute is called &quot;dangerous_inner_html&quot; because it is <strong>dangerous</strong> to pass it data you don't trust. If you're not careful, you can easily expose <a href="https://en.wikipedia.org/wiki/Cross-site_scripting">cross-site scripting (XSS)</a> attacks to your users.</p>
<p>If you're handling untrusted input, make sure to sanitize your HTML before passing it into <code>dangerous_inner_html</code> – or just pass it to a Text Element to escape any HTML tags.</p>
</blockquote>
<h2 id="boolean-attributes"><a class="header" href="#boolean-attributes">Boolean Attributes</a></h2>
<p>Most attributes, when rendered, will be rendered exactly as the input you provided. However, some attributes are considered &quot;boolean&quot; attributes and just their presence determines whether they affect the output. For these attributes, a provided value of <code>&quot;false&quot;</code> will cause them to be removed from the target element.</p>
<p>So this RSX wouldn't actually render the <code>hidden</code> attribute:</p>
<pre><pre class="playground"><code class="language-rust edition2018">
<span class="boring">#![allow(unused)]
</span><span class="boring">fn main() {
</span>cx.render(rsx! {
    div {
        hidden: &quot;false&quot;,
        &quot;hello&quot;
    }
})
<span class="boring">}
</span></code></pre></pre>
<pre><code class="language-html">&lt;div&gt;hello&lt;/div&gt;
</code></pre>
<p>Not all attributes work like this however. <em>Only the following attributes</em> have this behavior:</p>
<ul>
<li><code>allowfullscreen</code></li>
<li><code>allowpaymentrequest</code></li>
<li><code>async</code></li>
<li><code>autofocus</code></li>
<li><code>autoplay</code></li>
<li><code>checked</code></li>
<li><code>controls</code></li>
<li><code>default</code></li>
<li><code>defer</code></li>
<li><code>disabled</code></li>
<li><code>formnovalidate</code></li>
<li><code>hidden</code></li>
<li><code>ismap</code></li>
<li><code>itemscope</code></li>
<li><code>loop</code></li>
<li><code>multiple</code></li>
<li><code>muted</code></li>
<li><code>nomodule</code></li>
<li><code>novalidate</code></li>
<li><code>open</code></li>
<li><code>playsinline</code></li>
<li><code>readonly</code></li>
<li><code>required</code></li>
<li><code>reversed</code></li>
<li><code>selected</code></li>
<li><code>truespeed</code></li>
</ul>
<p>For any other attributes, a value of <code>&quot;false&quot;</code> will be sent directly to the DOM.</p>

                    </main>

                    <nav class="nav-wrapper" aria-label="Page navigation">
                        <!-- Mobile navigation buttons -->
                            <a rel="prev" href="../describing_ui/index.html" class="mobile-nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left">
                                <i class="fa fa-angle-left"></i>
                            </a>

                            <a rel="next" href="../describing_ui/components.html" class="mobile-nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right">
                                <i class="fa fa-angle-right"></i>
                            </a>

                        <div style="clear: both"></div>
                    </nav>
                </div>
            </div>

            <nav class="nav-wide-wrapper" aria-label="Page navigation">
                    <a rel="prev" href="../describing_ui/index.html" class="nav-chapters previous" title="Previous chapter" aria-label="Previous chapter" aria-keyshortcuts="Left">
                        <i class="fa fa-angle-left"></i>
                    </a>

                    <a rel="next" href="../describing_ui/components.html" class="nav-chapters next" title="Next chapter" aria-label="Next chapter" aria-keyshortcuts="Right">
                        <i class="fa fa-angle-right"></i>
                    </a>
            </nav>

        </div>


        <script type="text/javascript">
            window.playground_line_numbers = true;
        </script>

        <script type="text/javascript">
            window.playground_copyable = true;
        </script>

        <script src="../ace.js" type="text/javascript" charset="utf-8"></script>
        <script src="../editor.js" type="text/javascript" charset="utf-8"></script>
        <script src="../mode-rust.js" type="text/javascript" charset="utf-8"></script>
        <script src="../theme-dawn.js" type="text/javascript" charset="utf-8"></script>
        <script src="../theme-tomorrow_night.js" type="text/javascript" charset="utf-8"></script>

        <script src="../elasticlunr.min.js" type="text/javascript" charset="utf-8"></script>
        <script src="../mark.min.js" type="text/javascript" charset="utf-8"></script>
        <script src="../searcher.js" type="text/javascript" charset="utf-8"></script>

        <script src="../clipboard.min.js" type="text/javascript" charset="utf-8"></script>
        <script src="../highlight.js" type="text/javascript" charset="utf-8"></script>
        <script src="../book.js" type="text/javascript" charset="utf-8"></script>

        <!-- Custom JS scripts -->


    </body>
</html>