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Website Deployment Script
45 lines
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HTML
45 lines
27 KiB
HTML
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<script src="https://snack.expo.io/embed.js" defer="defer"></script><title data-react-helmet="true">Appearance · React Native</title><meta data-react-helmet="true" property="twitter:image" content="https://reactnative.dev/img/logo-og.png"><meta data-react-helmet="true" name="twitter:image:alt" content="Image for React Native"><meta data-react-helmet="true" name="docsearch:language" content="en"><meta data-react-helmet="true" name="docsearch:version" content="0.63"><meta data-react-helmet="true" name="docsearch:docusaurus_tag" content="docs-default-0.63"><meta data-react-helmet="true" property="og:image" content="https://reactnative.dev/img/logo-og.png"><meta data-react-helmet="true" name="twitter:card" content="summary"><meta data-react-helmet="true" name="twitter:image" content="https://reactnative.dev/img/logo-og.png"><meta data-react-helmet="true" property="og:title" content="Appearance · React Native"><meta data-react-helmet="true" name="description" content="`jsx"><meta data-react-helmet="true" property="og:description" content="`jsx"><meta data-react-helmet="true" property="og:url" content="https://reactnative.dev/docs/appearance"><link data-react-helmet="true" rel="shortcut icon" href="/img/favicon.ico"><link data-react-helmet="true" rel="preconnect" href="https://BH4D9OD16A-dsn.algolia.net" crossorigin="anonymous"><link data-react-helmet="true" rel="canonical" href="https://reactnative.dev/docs/appearance"><link rel="stylesheet" href="/styles.fccefeba.css">
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style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token keyword" style="color:#c5a5c5">import</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"> Appearance </span><span class="token punctuation" style="color:#657b83">}</span><span class="token plain"> </span><span class="token keyword" style="color:#c5a5c5">from</span><span class="token plain"> </span><span class="token string" style="color:#8dc891">'react-native'</span><span class="token punctuation" style="color:#657b83">;</span></div></div></div></div></div><h4><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_3pqN" id="developer-notes"></a>Developer notes<a aria-hidden="true" tabindex="-1" class="hash-link" href="#developer-notes" title="Direct link to heading">#</a></h4><p>The <code>Appearance</code> module exposes information about the user's appearance preferences, such as their preferred color scheme (light or dark).</p><div><ul role="tablist" aria-orientation="horizontal" class="tabs"><li role="tab" tabindex="0" aria-selected="false" class="tabs__item tabItem_3gSF" style="outline:none">Android</li><li role="tab" tabindex="0" aria-selected="false" class="tabs__item tabItem_3gSF" style="outline:none">iOS</li><li role="tab" tabindex="0" aria-selected="true" class="tabs__item tabItem_3gSF tabs__item--active" style="outline:none">Web</li></ul><div role="tabpanel" class="margin-vert--md"><div><blockquote><p>The <code>Appearance</code> API is inspired by the <a href="https://drafts.csswg.org/mediaqueries-5/" target="_blank" rel="noopener noreferrer">Media Queries draft</a> from the W3C. The color scheme preference is modeled after the <a href="https://developer.mozilla.org/en-US/docs/Web/CSS/@media/prefers-color-scheme" target="_blank" rel="noopener noreferrer"><code>prefers-color-scheme</code> CSS media feature</a>.</p></blockquote></div></div></div><h2><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_3pqN" id="example"></a>Example<a aria-hidden="true" tabindex="-1" class="hash-link" href="#example" title="Direct link to heading">#</a></h2><p>You can use the <code>Appearance</code> module to determine if the user prefers a dark color scheme:</p><div class="mdxCodeBlock_xYIz"><div class="codeBlockContent_rlEb"><button tabindex="0" type="button" aria-label="Copy code to clipboard" class="copyButton_kOW4">Copy</button><div class="prism-code language-jsx codeBlock_1AP7"><div class="codeBlockLines_1boI" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token keyword" style="color:#c5a5c5">const</span><span class="token plain"> colorScheme </span><span class="token operator" style="color:#fc929e">=</span><span class="token plain"> Appearance</span><span class="token punctuation" style="color:#657b83">.</span><span class="token function" style="color:#79b6f2">getColorScheme</span><span class="token punctuation" style="color:#657b83">(</span><span class="token punctuation" style="color:#657b83">)</span><span class="token punctuation" style="color:#657b83">;</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"></span><span class="token keyword" style="color:#c5a5c5">if</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">colorScheme </span><span class="token operator" style="color:#fc929e">===</span><span class="token plain"> </span><span class="token string" style="color:#8dc891">'dark'</span><span class="token punctuation" style="color:#657b83">)</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"> </span><span class="token comment" style="color:#93a1a1">// Use dark color scheme</span><span class="token plain"></span></div><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token plain"></span><span class="token punctuation" style="color:#657b83">}</span></div></div></div></div></div><p>Although the color scheme is available immediately, this may change (e.g. scheduled color scheme change at sunrise or sunset). Any rendering logic or styles that depend on the user preferred color scheme should try to call this function on every render, rather than caching the value. For example, you may use the <a href="/docs/usecolorscheme"><code>useColorScheme</code></a> React hook as it provides and subscribes to color scheme updates, or you may use inline styles rather than setting a value in a <code>StyleSheet</code>.</p><h1><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_3pqN" id="reference"></a>Reference<a aria-hidden="true" tabindex="-1" class="hash-link" href="#reference" title="Direct link to heading">#</a></h1><h2><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_3pqN" id="methods"></a>Methods<a aria-hidden="true" tabindex="-1" class="hash-link" href="#methods" title="Direct link to heading">#</a></h2><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_3pqN" id="getcolorscheme"></a><code>getColorScheme()</code><a aria-hidden="true" tabindex="-1" class="hash-link" href="#getcolorscheme" title="Direct link to heading">#</a></h3><div class="mdxCodeBlock_xYIz"><div class="codeBlockContent_rlEb"><button tabindex="0" type="button" aria-label="Copy code to clipboard" class="copyButton_kOW4">Copy</button><div class="prism-code language-jsx codeBlock_1AP7"><div class="codeBlockLines_1boI" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token keyword" style="color:#c5a5c5">static</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">getColorScheme</span><span class="token punctuation" style="color:#657b83">(</span><span class="token punctuation" style="color:#657b83">)</span></div></div></div></div></div><p>Indicates the current user preferred color scheme. The value may be updated later, either through direct user action (e.g. theme selection in device settings) or on a schedule (e.g. light and dark themes that follow the day/night cycle).</p><p>Supported color schemes:</p><ul><li><code>light</code>: The user prefers a light color theme.</li><li><code>dark</code>: The user prefers a dark color theme.</li><li>null: The user has not indicated a preferred color theme.</li></ul><p>See also: <code>useColorScheme</code> hook.</p><blockquote><p>Note: <code>getColorScheme()</code> will always return <code>light</code> when debugging with Chrome.</p></blockquote><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_3pqN" id="addchangelistener"></a><code>addChangeListener()</code><a aria-hidden="true" tabindex="-1" class="hash-link" href="#addchangelistener" title="Direct link to heading">#</a></h3><div class="mdxCodeBlock_xYIz"><div class="codeBlockContent_rlEb"><button tabindex="0" type="button" aria-label="Copy code to clipboard" class="copyButton_kOW4">Copy</button><div class="prism-code language-jsx codeBlock_1AP7"><div class="codeBlockLines_1boI" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token keyword" style="color:#c5a5c5">static</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">addChangeListener</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">listener</span><span class="token punctuation" style="color:#657b83">)</span></div></div></div></div></div><p>Add an event handler that is fired when appearance preferences change.</p><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_3pqN" id="removechangelistener"></a><code>removeChangeListener()</code><a aria-hidden="true" tabindex="-1" class="hash-link" href="#removechangelistener" title="Direct link to heading">#</a></h3><div class="mdxCodeBlock_xYIz"><div class="codeBlockContent_rlEb"><button tabindex="0" type="button" aria-label="Copy code to clipboard" class="copyButton_kOW4">Copy</button><div class="prism-code language-jsx codeBlock_1AP7"><div class="codeBlockLines_1boI" style="color:#FFFFFF;background:#282C34"><div class="token-line" style="color:#FFFFFF;background:#282C34"><span class="token keyword" style="color:#c5a5c5">static</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">removeChangeListener</span><span class="token punctuation" style="color:#657b83">(</span><span class="token plain">listener</span><span class="token punctuation" style="color:#657b83">)</span></div></div></div></div></div><p>Remove an event handler.</p></div></article><div class="docMetadata margin-vert--xl"><div class="row"><div class="col"><a href="https://github.com/facebook/react-native-website/blob/master/website/versioned_docs/version-0.63/appearance.md" target="_blank" rel="noreferrer noopener"><svg 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