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1<!doctype html><html lang=en dir=ltr class="docs-wrapper plugin-docs plugin-id-default docs-version-0.79 docs-doc-page docs-doc-id-dimensions" data-has-hydrated=false><meta charset=UTF-8><meta name=generator content="Docusaurus v3.8.0"><title data-rh=true>Dimensions · React Native</title><meta data-rh=true name=viewport content="width=device-width, initial-scale=1.0"><meta data-rh=true property=og:url content=https://reactnative.dev/docs/dimensions><meta data-rh=true property=og:locale content=en><meta data-rh=true name=docusaurus_locale content=en><meta data-rh=true name=docsearch:language content=en><meta data-rh=true property=og:image content=https://reactnative.dev/img/logo-share.png><meta data-rh=true name=twitter:card content=summary_large_image><meta data-rh=true name=twitter:image content=https://reactnative.dev/img/logo-share.png><meta data-rh=true name=twitter:site content=@reactnative><meta data-rh=true name=docusaurus_version content=0.79><meta data-rh=true name=docusaurus_tag content=docs-default-0.79><meta data-rh=true name=docsearch:version content=0.79><meta data-rh=true name=docsearch:docusaurus_tag content=docs-default-0.79><meta data-rh=true property=og:title content="Dimensions · React Native"><meta data-rh=true name=description content="useWindowDimensions is the preferred API for React components. Unlike Dimensions, it updates as the window's dimensions update. This works nicely with the React paradigm."><meta data-rh=true property=og:description content="useWindowDimensions is the preferred API for React components. Unlike Dimensions, it updates as the window's dimensions update. 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APIs</a></div><ul class=menu__list><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-3 menu__list-item"><a class=menu__link tabindex=0 href=/docs/actionsheetios>ActionSheetIOS</a><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-3 menu__list-item"><a class=menu__link tabindex=0 href=/docs/dynamiccolorios>DynamicColorIOS</a><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-3 menu__list-item"><a class=menu__link tabindex=0 href=/docs/settings>Settings</a></ul></ul></ul></nav></div></div></aside><main class=docMainContainer_a9sJ><div class="container padding-top--md padding-bottom--lg"><div class=row><div class="col docItemCol_Qr34"><div class=docItemContainer_tjFy><article><div class="tocCollapsible_wXna theme-doc-toc-mobile tocMobile_Ojys"><button type=button class="clean-btn tocCollapsibleButton_iI2p">On this page</button></div><div class="theme-doc-markdown markdown"><header><h1>Dimensions</h1></header><blockquote> 5<p><a href=/docs/usewindowdimensions><code>useWindowDimensions</code></a> is the preferred API for React components. Unlike <code>Dimensions</code>, it updates as the window's dimensions update. This works nicely with the React paradigm.</p> 6</blockquote> 7<div class="language-tsx codeBlockContainer_mQmQ theme-code-block" style=--prism-color:#FFFFFF;--prism-background-color:#282C34><div class=codeBlockTitle_kY6l>tsx</div><div class=codeBlockContent_t_Hd><pre tabindex=0 class="prism-code language-tsx codeBlock_RMoD thin-scrollbar" style=color:#FFFFFF;background-color:#282C34><code class=codeBlockLines_AclH><span class=token-line style=color:#FFFFFF><span class="token keyword" style=color:#c5a5c5>import</span><span class="token plain"> </span><span class="token imports punctuation" style=color:#657b83>{</span><span class="token imports maybe-class-name">Dimensions</span><span class="token imports 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><br></span></code></pre></div></div> 8<p>You can get the application window's width and height using the following code:</p> 9<div class="language-tsx codeBlockContainer_mQmQ theme-code-block" style=--prism-color:#FFFFFF;--prism-background-color:#282C34><div class=codeBlockTitle_kY6l>tsx</div><div class=codeBlockContent_t_Hd><pre tabindex=0 class="prism-code language-tsx codeBlock_RMoD thin-scrollbar" style=color:#FFFFFF;background-color:#282C34><code class=codeBlockLines_AclH><span class=token-line style=color:#FFFFFF><span class="token keyword" style=color:#c5a5c5>const</span><span class="token plain"> windowWidth </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> </span><span class="token maybe-class-name">Dimensions</span><span class="token punctuation" style=color:#657b83>.</span><span class="token method function property-access" style=color:#79b6f2>get</span><span class="token punctuation" style=color:#657b83>(</span><span class="token string" style=color:#8dc891>'window'</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>.</span><span class="token property-access">width</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>const</span><span class="token plain"> windowHeight </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> </span><span class="token maybe-class-name">Dimensions</span><span class="token punctuation" style=color:#657b83>.</span><span class="token method function property-access" style=color:#79b6f2>get</span><span class="token punctuation" style=color:#657b83>(</span><span class="token string" style=color:#8dc891>'window'</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>.</span><span class="token property-access">height</span><span class="token punctuation" style=color:#657b83>;</span><br></span></code></pre></div></div> 10<blockquote> 11<p>Although dimensions are available immediately, they may change (e.g due to device rotation, foldable devices etc) so any rendering logic or styles that depend on these constants should try to call this function on every render, rather than caching the value (for example, using inline styles rather than setting a value in a <code>StyleSheet</code>).</p> 12</blockquote> 13<p>If you are targeting foldable devices or devices which can change the screen size or app window size, you can use the event listener available in the Dimensions module as shown in the below example.</p> 14<h2 class="anchor anchorWithStickyNavbar_JmGV" id=example>Example<a href=#example class=hash-link aria-label="Direct link to Example" title="Direct link to Example">​</a></h2> 15<div class=snack-player data-snack-name="Dimensions Example" data-snack-description="Example usage" data-snack-files="%7B%22App.tsx%22%3A%7B%22type%22%3A%22CODE%22%2C%22contents%22%3A%22import%20React%2C%20%7BuseState%2C%20useEffect%7D%20from%20'react'%3B%5Cnimport%20%7BStyleSheet%2C%20Text%2C%20Dimensions%7D%20from%20'react-native'%3B%5Cnimport%20%7BSafeAreaView%2C%20SafeAreaProvider%7D%20from%20'react-native-safe-area-context'%3B%5Cn%5Cnconst%20windowDimensions%20%3D%20Dimensions.get('window')%3B%5Cnconst%20screenDimensions%20%3D%20Dimensions.get('screen')%3B%5Cn%5Cnconst%20App%20%3D%20()%20%3D%3E%20%7B%5Cn%20%20const%20%5Bdimensions%2C%20setDimensions%5D%20%3D%20useState(%7B%5Cn%20%20%20%20window%3A%20windowDimensions%2C%5Cn%20%20%20%20screen%3A%20screenDimensions%2C%5Cn%20%20%7D)%3B%5Cn%5Cn%20%20useEffect(()%20%3D%3E%20%7B%5Cn%20%20%20%20const%20subscription%20%3D%20Dimensions.addEventListener(%5Cn%20%20%20%20%20%20'change'%2C%5Cn%20%20%20%20%20%20(%7Bwindow%2C%20screen%7D)%20%3D%3E%20%7B%5Cn%20%20%20%20%20%20%20%20setDimensions(%7Bwindow%2C%20screen%7D)%3B%5Cn%20%20%20%20%20%20%7D%2C%5Cn%20%20%20%20)%3B%5Cn%20%20%20%20return%20()%20%3D%3E%20subscription%3F.remove()%3B%5Cn%20%20%7D)%3B%5Cn%5Cn%20%20return%20(%5Cn%20%20%20%20%3CSafeAreaProvider%3E%5Cn%20%20%20%20%20%20%3CSafeAreaView%20style%3D%7Bstyles.container%7D%3E%5Cn%20%20%20%20%20%20%20%20%3CText%20style%3D%7Bstyles.header%7D%3EWindow%20Dimensions%3C%2FText%3E%5Cn%20%20%20%20%20%20%20%20%7BObject.entries(dimensions.window).map((%5Bkey%2C%20value%5D)%20%3D%3E%20(%5Cn%20%20%20%20%20%20%20%20%20%20%3CText%3E%5Cn%20%20%20%20%20%20%20%20%20%20%20%20%7Bkey%7D%20-%20%7Bvalue%7D%5Cn%20%20%20%20%20%20%20%20%20%20%3C%2FText%3E%5Cn%20%20%20%20%20%20%20%20))%7D%5Cn%20%20%20%20%20%20%20%20%3CText%20style%3D%7Bstyles.header%7D%3EScreen%20Dimensions%3C%2FText%3E%5Cn%20%20%20%20%20%20%20%20%7BObject.entries(dimensions.screen).map((%5Bkey%2C%20value%5D)%20%3D%3E%20(%5Cn%20%20%20%20%20%20%20%20%20%20%3CText%3E%5Cn%20%20%20%20%20%20%20%20%20%20%20%20%7Bkey%7D%20-%20%7Bvalue%7D%5Cn%20%20%20%20%20%20%20%20%20%20%3C%2FText%3E%5Cn%20%20%20%20%20%20%20%20))%7D%5Cn%20%20%20%20%20%20%3C%2FSafeAreaView%3E%5Cn%20%20%20%20%3C%2FSafeAreaProvider%3E%5Cn%20%20)%3B%5Cn%7D%3B%5Cn%5Cnconst%20styles%20%3D%20StyleSheet.create(%7B%5Cn%20%20container%3A%20%7B%5Cn%20%20%20%20flex%3A%201%2C%5Cn%20%20%20%20justifyContent%3A%20'center'%2C%5Cn%20%20%20%20alignItems%3A%20'center'%2C%5Cn%20%20%7D%2C%5Cn%20%20header%3A%20%7B%5Cn%20%20%20%20fontSize%3A%2016%2C%5Cn%20%20%20%20marginVertical%3A%2010%2C%5Cn%20%20%7D%2C%5Cn%7D)%3B%5Cn%5Cnexport%20default%20App%3B%22%7D%7D" data-snack-dependencies=react-native-safe-area-context data-snack-platform=web data-snack-supported-platforms=ios,android,web data-snack-theme=light data-snack-preview=true data-snack-loading=lazy data-snack-device-frame=false></div> 16<h1>Reference</h1> 17<h2 class="anchor anchorWithStickyNavbar_JmGV" id=methods>Methods<a href=#methods class=hash-link aria-label="Direct link to Methods" title="Direct link to Methods">​</a></h2> 18<h3 class="anchor anchorWithStickyNavbar_JmGV" id=addeventlistener><code>addEventListener()</code><a href=#addeventlistener class=hash-link aria-label="Direct link to addeventlistener" title="Direct link to addeventlistener">​</a></h3> 19<div class="language-tsx codeBlockContainer_mQmQ theme-code-block" style=--prism-color:#FFFFFF;--prism-background-color:#282C34><div class=codeBlockTitle_kY6l>tsx</div><div class=codeBlockContent_t_Hd><pre tabindex=0 class="prism-code language-tsx codeBlock_RMoD thin-scrollbar" style=color:#FFFFFF;background-color:#282C34><code class=codeBlockLines_AclH><span class=token-line style=color:#FFFFFF><span class="token keyword" style=color:#c5a5c5>static</span><span class="token plain"> </span><span class="token function" style=color:#79b6f2>addEventListener</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> type</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> </span><span class="token string" style=color:#8dc891>'change'</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token function-variable function" style=color:#79b6f2>handler</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>(</span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token dom variable" style=color:#cb4b16>window</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> screen</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> </span><span class="token maybe-class-name">DimensionsValue</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token arrow operator" style=color:#fc929e>=></span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>void</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token punctuation" style=color:#657b83>)</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> </span><span class="token maybe-class-name">EmitterSubscription</span><span class="token punctuation" style=color:#657b83>;</span><br></span></code></pre></div></div> 20<p>Add an event handler. Supported events:</p> 21<ul> 22<li><code>change</code>: Fires when a property within the <code>Dimensions</code> object changes. The argument to the event handler is a <a href=#dimensionsvalue><code>DimensionsValue</code></a> type object.</li> 23</ul> 24<hr> 25<h3 class="anchor anchorWithStickyNavbar_JmGV" id=get><code>get()</code><a href=#get class=hash-link aria-label="Direct link to get" title="Direct link to get">​</a></h3> 26<div class="language-tsx codeBlockContainer_mQmQ theme-code-block" style=--prism-color:#FFFFFF;--prism-background-color:#282C34><div class=codeBlockTitle_kY6l>tsx</div><div class=codeBlockContent_t_Hd><pre tabindex=0 class="prism-code language-tsx codeBlock_RMoD thin-scrollbar" style=color:#FFFFFF;background-color:#282C34><code class=codeBlockLines_AclH><span class=token-line style=color:#FFFFFF><span class="token keyword" style=color:#c5a5c5>static</span><span class="token plain"> </span><span class="token function" style=color:#79b6f2>get</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">dim</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> </span><span class="token string" style=color:#8dc891>'window'</span><span class="token plain"> </span><span class="token operator" style=color:#fc929e>|</span><span class="token plain"> </span><span class="token string" style=color:#8dc891>'screen'</span><span class="token punctuation" style=color:#657b83>)</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> </span><span class="token maybe-class-name">ScaledSize</span><span class="token punctuation" style=color:#657b83>;</span><br></span></code></pre></div></div> 27<p>Initial dimensions are set before <code>runApplication</code> is called so they should be available before any other require's are run, but may be updated later.</p> 28<p>Example: <code>const {height, width} = Dimensions.get('window');</code></p> 29<p><strong>Parameters:</strong></p> 30<table><thead><tr><th>Name<th>Type<th>Description<tbody><tr><td>dim <div class="label basic required two-lines">Required</div><td>string<td>Name of dimension as defined when calling <code>set</code>. Returns value for the dimension.</table> 31<blockquote> 32<p>For Android the <code>window</code> dimension will exclude the size used by the <code>status bar</code> (if not translucent) and <code>bottom navigation bar</code></p> 33</blockquote> 34<hr> 35<h2 class="anchor anchorWithStickyNavbar_JmGV" id=type-definitions>Type Definitions<a href=#type-definitions class=hash-link aria-label="Direct link to Type Definitions" title="Direct link to Type Definitions">​</a></h2> 36<h3 class="anchor anchorWithStickyNavbar_JmGV" id=dimensionsvalue>DimensionsValue<a href=#dimensionsvalue class=hash-link aria-label="Direct link to DimensionsValue" title="Direct link to DimensionsValue">​</a></h3> 37<p><strong>Properties:</strong></p> 38<table><thead><tr><th>Name<th>Type<th>Description<tbody><tr><td>window<td><a href=/docs/dimensions#scaledsize>ScaledSize</a><td>Size of the visible Application window.<tr><td>screen<td><a href=/docs/dimensions#scaledsize>ScaledSize</a><td>Size of the device's screen.</table> 39<h3 class="anchor anchorWithStickyNavbar_JmGV" id=scaledsize>ScaledSize<a href=#scaledsize class=hash-link aria-label="Direct link to ScaledSize" title="Direct link to ScaledSize">​</a></h3> 40<table><thead><tr><th>Type<tbody><tr><td>object</table> 41<p><strong>Properties:</strong></p> 42<table><thead><tr><th>Name<th>Type<tbody><tr><td>width<td>number<tr><td>height<td>number<tr><td>scale<td>number<tr><td>fontScale<td>number</table></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="theme-doc-footer-edit-meta-row row"><div class=editButtons_t0bR><a href=https://github.com/facebook/react-native-website/edit/main/docs/dimensions.md target=_blank rel="noopener noreferrer" class=theme-edit-this-page><svg fill=currentColor height=20 width=20 viewBox="0 0 40 40" class=iconEdit_bHB7 aria-hidden=true><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 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