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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">import</span><span class="token plain"> </span><span class="token punctuation" style="color:#657b83">{</span><span class="token plain"> useWindowDimensions </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">&#x27;react-native&#x27;</span><span class="token punctuation" style="color:#657b83">;</span></div></div></div></div></div><p><code>useWindowDimensions</code> automatically updates <code>width</code> and <code>height</code> values when screen size changes. You can get your application window&#x27;s width and height like so:</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"> windowWidth </span><span class="token operator" style="color:#fc929e">=</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">useWindowDimensions</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">width</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">const</span><span class="token plain"> windowHeight </span><span class="token operator" style="color:#fc929e">=</span><span class="token plain"> </span><span class="token function" style="color:#79b6f2">useWindowDimensions</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">height</span><span class="token punctuation" style="color:#657b83">;</span></div></div></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><div class="snack-player" data-snack-name="useWindowDimensions" data-snack-description="Example usage" data-snack-code="import%20React%20from%20%22react%22%3B%0Aimport%20%7B%20View%2C%20StyleSheet%2C%20Text%2C%20useWindowDimensions%20%7D%20from%20%22react-native%22%3B%0A%0Aconst%20App%20%3D%20()%20%3D%3E%20%7B%0A%20%20const%20window%20%3D%20useWindowDimensions()%3B%0A%20%20return%20(%0A%20%20%20%20%3CView%20style%3D%7Bstyles.container%7D%3E%0A%20%20%20%20%20%20%3CText%3E%7B%60Window%20Dimensions%3A%20height%20-%20%24%7Bwindow.height%7D%2C%20width%20-%20%24%7Bwindow.width%7D%60%7D%3C%2FText%3E%0A%20%20%20%20%3C%2FView%3E%0A%20%20)%3B%0A%7D%0Aconst%20styles%20%3D%20StyleSheet.create(%7B%0A%20%20container%3A%20%7B%0A%20%20%20%20flex%3A%201%2C%0A%20%20%20%20justifyContent%3A%20%22center%22%2C%0A%20%20%20%20alignItems%3A%20%22center%22%0A%20%20%7D%0A%7D)%3B%0A%0Aexport%20default%20App%3B" data-snack-dependencies="" data-snack-platform="web" data-snack-supported-platforms="ios,android" data-snack-theme="light" data-snack-preview="true" data-snack-loading="lazy"></div><ul><li>The <a href="https://github.com/react-native-community/react-native-hooks#usedimensions" target="_blank" rel="noopener noreferrer">useDimensions</a> hook from the community <a href="https://github.com/react-native-community/react-native-hooks" target="_blank" rel="noopener noreferrer">React native hooks</a> library aims to make handling screen/window size changes easier to work with.</li><li><a href="https://github.com/DaniAkash/react-native-responsive-dimensions" target="_blank" rel="noopener noreferrer">React Native Responsive Dimensions</a> also comes with responsive hooks.</li></ul><h2><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_3pqN" id="properties"></a>Properties<a aria-hidden="true" tabindex="-1" class="hash-link" href="#properties" title="Direct link to heading">#</a></h2><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_3pqN" id="fontscale"></a><code>fontScale</code><a aria-hidden="true" tabindex="-1" class="hash-link" href="#fontscale" title="Direct link to heading">#</a></h3><p>The scale of the font currently used. Some operating systems allow users to scale their font sizes larger or smaller for reading comfort. This property will let you know what is in effect.</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 function" style="color:#79b6f2">useWindowDimensions</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">fontScale</span><span class="token punctuation" style="color:#657b83">;</span></div></div></div></div></div><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_3pqN" id="height"></a><code>height</code><a aria-hidden="true" tabindex="-1" class="hash-link" href="#height" title="Direct link to heading">#</a></h3><p>The height in pixels of the window or screen your app occupies.</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 function" style="color:#79b6f2">useWindowDimensions</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">height</span><span class="token punctuation" style="color:#657b83">;</span></div></div></div></div></div><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_3pqN" id="scale"></a><code>scale</code><a aria-hidden="true" tabindex="-1" class="hash-link" href="#scale" title="Direct link to heading">#</a></h3><p>The pixel ratio of the device your app is running on.</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 function" style="color:#79b6f2">useWindowDimensions</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">scale</span><span class="token punctuation" style="color:#657b83">;</span></div></div></div></div></div><blockquote><p>A value of <code>1</code> indicates PPI/DPI of 96 (76 on some platforms). <code>2</code> indicates a Retina or high DPI display.</p></blockquote><h3><a aria-hidden="true" tabindex="-1" class="anchor enhancedAnchor_3pqN" id="width"></a><code>width</code><a aria-hidden="true" tabindex="-1" class="hash-link" href="#width" title="Direct link to heading">#</a></h3><p>The width in pixels of the window or screen your app occupies.</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 function" style="color:#79b6f2">useWindowDimensions</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">width</span><span class="token punctuation" style="color:#657b83">;</span></div></div></div></div></div></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/usewindowdimensions.md" target="_blank" rel="noreferrer noopener"><svg fill="currentColor" height="1.2em" width="1.2em" preserveAspectRatio="xMidYMid meet" viewBox="0 0 40 40" style="margin-right:0.3em;vertical-align:sub"><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 18.4h-6.3v-6.2z"></path></g></svg>Edit this page</a></div><div class="col text--right"><em><small class="docMetadata-updated">Last updated on <time datetime="2020-10-29T04:19:29.000Z" class="docLastUpdatedAt_1gIo">10/29/2020</time></small></em></div></div></div><div class="margin-vert--lg"><nav class="pagination-nav" 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class="table-of-contents__link"><code>scale</code></a></li><li><a href="#width" class="table-of-contents__link"><code>width</code></a></li></ul></li></ul></div></div></div></div></main></div></div><footer class="footer footer--dark"><div class="container"><div class="row footer__links"><div class="col footer__col"><h4 class="footer__title">Docs</h4><ul class="footer__items"><li class="footer__item"><a class="footer__link-item" href="/docs/getting-started">Getting Started</a></li><li class="footer__item"><a class="footer__link-item" href="/docs/tutorial">Tutorial</a></li><li class="footer__item"><a class="footer__link-item" href="/docs/components-and-apis">Components and APIs</a></li><li class="footer__item"><a class="footer__link-item" href="/docs/more-resources">More Resources</a></li></ul></div><div class="col footer__col"><h4 class="footer__title">Community</h4><ul class="footer__items"><li class="footer__item"><a class="footer__link-item" href="/help">The React Native 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