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@@ -79,7 +79,7 @@
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<p>Certain components may have properties that work on one platform only. All of these props are annotated with <code>@platform</code> and have a small badge next to them on the website.</p>
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<h2><a class="anchor" aria-hidden="true" id="platform-module"></a><a href="#platform-module" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Platform module</h2>
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<p>React Native provides a module that detects the platform in which the app is running. You can use the detection logic to implement platform-specific code. Use this option when only small parts of a component are platform-specific.</p>
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<pre><code class="hljs css language-javascript"><span class="token keyword">import</span> <span class="token punctuation">{</span>Platform<span class="token punctuation">,</span> StyleSheet<span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'react-native'</span><span class="token punctuation">;</span>
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<pre><code class="hljs css language-jsx"><span class="token keyword">import</span> <span class="token punctuation">{</span>Platform<span class="token punctuation">,</span> StyleSheet<span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'react-native'</span><span class="token punctuation">;</span>
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<span class="token keyword">const</span> styles <span class="token operator">=</span> StyleSheet<span class="token punctuation">.</span><span class="token function">create</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
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height<span class="token punctuation">:</span> Platform<span class="token punctuation">.</span><span class="token constant">OS</span> <span class="token operator">===</span> <span class="token string">'ios'</span> <span class="token operator">?</span> <span class="token number">200</span> <span class="token punctuation">:</span> <span class="token number">100</span><span class="token punctuation">,</span>
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@@ -87,7 +87,7 @@
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</code></pre>
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<p><code>Platform.OS</code> will be <code>ios</code> when running on iOS and <code>android</code> when running on Android.</p>
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<p>There is also a <code>Platform.select</code> method available, that given an object containing Platform.OS as keys, returns the value for the platform you are currently running on.</p>
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<pre><code class="hljs css language-javascript"><span class="token keyword">import</span> <span class="token punctuation">{</span>Platform<span class="token punctuation">,</span> StyleSheet<span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'react-native'</span><span class="token punctuation">;</span>
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<pre><code class="hljs css language-jsx"><span class="token keyword">import</span> <span class="token punctuation">{</span>Platform<span class="token punctuation">,</span> StyleSheet<span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'react-native'</span><span class="token punctuation">;</span>
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<span class="token keyword">const</span> styles <span class="token operator">=</span> StyleSheet<span class="token punctuation">.</span><span class="token function">create</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
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container<span class="token punctuation">:</span> <span class="token punctuation">{</span>
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@@ -105,16 +105,16 @@
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</code></pre>
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<p>This will result in a container having <code>flex: 1</code> on both platforms, a red background color on iOS, and a blue background color on Android.</p>
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<p>Since it accepts <code>any</code> value, you can also use it to return platform specific component, like below:</p>
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<pre><code class="hljs css language-javascript"><span class="token keyword">const</span> Component <span class="token operator">=</span> Platform<span class="token punctuation">.</span><span class="token function">select</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
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<pre><code class="hljs css language-jsx"><span class="token keyword">const</span> Component <span class="token operator">=</span> Platform<span class="token punctuation">.</span><span class="token function">select</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
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<span class="token function-variable function">ios</span><span class="token punctuation">:</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token function">require</span><span class="token punctuation">(</span><span class="token string">'ComponentIOS'</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
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<span class="token function-variable function">android</span><span class="token punctuation">:</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token function">require</span><span class="token punctuation">(</span><span class="token string">'ComponentAndroid'</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
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<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token operator"><</span>Component <span class="token operator">/</span><span class="token operator">></span><span class="token punctuation">;</span>
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<span class="token tag"><span class="token tag"><span class="token punctuation"><</span><span class="token class-name">Component</span></span> <span class="token punctuation">/></span></span><span class="token punctuation">;</span>
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</code></pre>
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<h3><a class="anchor" aria-hidden="true" id="detecting-the-android-version"></a><a href="#detecting-the-android-version" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Detecting the Android version</h3>
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<p>On Android, the <code>Platform</code> module can also be used to detect the version of the Android Platform in which the app is running:</p>
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<pre><code class="hljs css language-javascript"><span class="token keyword">import</span> <span class="token punctuation">{</span>Platform<span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'react-native'</span><span class="token punctuation">;</span>
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<pre><code class="hljs css language-jsx"><span class="token keyword">import</span> <span class="token punctuation">{</span>Platform<span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'react-native'</span><span class="token punctuation">;</span>
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<span class="token keyword">if</span> <span class="token punctuation">(</span>Platform<span class="token punctuation">.</span>Version <span class="token operator">===</span> <span class="token number">25</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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console<span class="token punctuation">.</span><span class="token function">log</span><span class="token punctuation">(</span><span class="token string">'Running on Nougat!'</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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@@ -122,7 +122,7 @@
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</code></pre>
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<h3><a class="anchor" aria-hidden="true" id="detecting-the-ios-version"></a><a href="#detecting-the-ios-version" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Detecting the iOS version</h3>
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<p>On iOS, the <code>Version</code> is a result of <code>-[UIDevice systemVersion]</code>, which is a string with the current version of the operating system. An example of the system version is "10.3". For example, to detect the major version number on iOS:</p>
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<pre><code class="hljs css language-javascript"><span class="token keyword">import</span> <span class="token punctuation">{</span>Platform<span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'react-native'</span><span class="token punctuation">;</span>
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<pre><code class="hljs css language-jsx"><span class="token keyword">import</span> <span class="token punctuation">{</span>Platform<span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'react-native'</span><span class="token punctuation">;</span>
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<span class="token keyword">const</span> majorVersionIOS <span class="token operator">=</span> <span class="token function">parseInt</span><span class="token punctuation">(</span>Platform<span class="token punctuation">.</span>Version<span class="token punctuation">,</span> <span class="token number">10</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token keyword">if</span> <span class="token punctuation">(</span>majorVersionIOS <span class="token operator"><=</span> <span class="token number">9</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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@@ -136,7 +136,7 @@
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BigButton.android.js
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</code></pre>
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<p>You can then require the component as follows:</p>
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<pre><code class="hljs css language-javascript"><span class="token keyword">import</span> BigButton <span class="token keyword">from</span> <span class="token string">'./BigButton'</span><span class="token punctuation">;</span>
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<pre><code class="hljs css language-jsx"><span class="token keyword">import</span> BigButton <span class="token keyword">from</span> <span class="token string">'./BigButton'</span><span class="token punctuation">;</span>
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</code></pre>
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<p>React Native will automatically pick up the right file based on the running platform.</p>
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<h2><a class="anchor" aria-hidden="true" id="native-specific-extensions-ie-sharing-code-with-nodejs-and-web"></a><a href="#native-specific-extensions-ie-sharing-code-with-nodejs-and-web" aria-hidden="true" class="hash-link"><svg class="hash-link-icon" aria-hidden="true" height="16" version="1.1" viewBox="0 0 16 16" width="16"><path fill-rule="evenodd" d="M4 9h1v1H4c-1.5 0-3-1.69-3-3.5S2.55 3 4 3h4c1.45 0 3 1.69 3 3.5 0 1.41-.91 2.72-2 3.25V8.59c.58-.45 1-1.27 1-2.09C10 5.22 8.98 4 8 4H4c-.98 0-2 1.22-2 2.5S3 9 4 9zm9-3h-1v1h1c1 0 2 1.22 2 2.5S13.98 12 13 12H9c-.98 0-2-1.22-2-2.5 0-.83.42-1.64 1-2.09V6.25c-1.09.53-2 1.84-2 3.25C6 11.31 7.55 13 9 13h4c1.45 0 3-1.69 3-3.5S14.5 6 13 6z"></path></svg></a>Native-specific extensions (i.e. sharing code with NodeJS and Web)</h2>
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@@ -146,7 +146,7 @@ BigButton.android.js
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Container.native.js <span class="hljs-comment"># picked up by the React Native bundler for both Android and iOS (Metro)</span>
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</code></pre>
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<p>You can still require it without the <code>.native</code> extension, as follows:</p>
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<pre><code class="hljs css language-javascript"><span class="token keyword">import</span> Container <span class="token keyword">from</span> <span class="token string">'./Container'</span><span class="token punctuation">;</span>
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<pre><code class="hljs css language-jsx"><span class="token keyword">import</span> Container <span class="token keyword">from</span> <span class="token string">'./Container'</span><span class="token punctuation">;</span>
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</code></pre>
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<p><strong>Pro tip:</strong> Configure your Web bundler to ignore <code>.native.js</code> extensions in order to avoid having unused code in your production bundle, thus reducing the final bundle size.</p>
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</span></div></article></div><div class="docs-prevnext"><a class="docs-prev button" href="/react-native/docs/components-and-apis"><span class="arrow-prev">← </span><span>Components and APIs</span></a><a class="docs-next button" href="/react-native/docs/navigation"><span>Navigating Between Screens</span><span class="arrow-next"> →</span></a></div></div></div></div><footer class="nav-footer" id="footer"><section class="sitemap"><a href="/react-native/" class="nav-home"><img src="/react-native/img/header_logo.png" alt="React Native" width="66" height="58"/></a><div><h5><a href="/react-native/docs/getting-started.html">Docs</a></h5><a href="/react-native/docs/getting-started.html">Getting Started</a><a href="/react-native/docs/tutorial.html">Tutorial</a><a href="/react-native/docs/components-and-apis.html">Components and APIs</a><a href="/react-native/docs/more-resources.html">More Resources</a></div><div><h5>Community</h5><a href="/react-native/help.html">The React Native Community</a><a href="/react-native/showcase.html">Who's using React Native?</a><a href="http://stackoverflow.com/questions/tagged/react-native" target="_blank">Ask Questions on Stack Overflow</a><a href="https://github.com/facebook/react-native/blob/master/CONTRIBUTING.md">Contributor Guide</a></div><div><h5>More Resources</h5><a href="/react-native/blog/">Blog</a><a href="https://twitter.com/reactnative" target="_blank">Twitter</a><a href="https://github.com/facebook/react-native" target="_blank">GitHub</a><a href="http://reactjs.org" target="_blank">React</a></div></section><a href="https://code.facebook.com/projects/" target="_blank" class="fbOpenSource"><img src="/react-native/img/oss_logo.png" alt="Facebook Open Source" width="170" height="45"/></a><section class="copyright">Copyright © 2019 Facebook Inc.</section></footer></div><script type="text/javascript" src="https://cdn.jsdelivr.net/docsearch.js/1/docsearch.min.js"></script><script>window.fbAsyncInit = function() {FB.init({appId:'1677033832619985',xfbml:true,version:'v2.7'});};(function(d, s, id){var js, fjs = d.getElementsByTagName(s)[0];if (d.getElementById(id)) {return;}js = d.createElement(s); js.id = id;js.src = '//connect.facebook.net/en_US/sdk.js';fjs.parentNode.insertBefore(js, fjs);}(document, 'script','facebook-jssdk'));
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