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markdown"><header><h1>StyleSheet</h1></header><p>A StyleSheet is an abstraction similar to CSS StyleSheets.</p>
5<div class=snack-player data-snack-name=StyleSheet 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%20from%20'react'%3B%5Cnimport%20%7BStyleSheet%2C%20Text%7D%20from%20'react-native'%3B%5Cnimport%20%7BSafeAreaView%2C%20SafeAreaProvider%7D%20from%20'react-native-safe-area-context'%3B%5Cn%5Cnconst%20App%20%3D%20()%20%3D%3E%20(%5Cn%20%20%3CSafeAreaProvider%3E%5Cn%20%20%20%20%3CSafeAreaView%20style%3D%7Bstyles.container%7D%3E%5Cn%20%20%20%20%20%20%3CText%20style%3D%7Bstyles.title%7D%3EReact%20Native%3C%2FText%3E%5Cn%20%20%20%20%3C%2FSafeAreaView%3E%5Cn%20%20%3C%2FSafeAreaProvider%3E%5Cn)%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%20padding%3A%2024%2C%5Cn%20%20%20%20backgroundColor%3A%20'%23eaeaea'%2C%5Cn%20%20%7D%2C%5Cn%20%20title%3A%20%7B%5Cn%20%20%20%20marginTop%3A%2016%2C%5Cn%20%20%20%20paddingVertical%3A%208%2C%5Cn%20%20%20%20borderWidth%3A%204%2C%5Cn%20%20%20%20borderColor%3A%20'%2320232a'%2C%5Cn%20%20%20%20borderRadius%3A%206%2C%5Cn%20%20%20%20backgroundColor%3A%20'%2361dafb'%2C%5Cn%20%20%20%20color%3A%20'%2320232a'%2C%5Cn%20%20%20%20textAlign%3A%20'center'%2C%5Cn%20%20%20%20fontSize%3A%2030%2C%5Cn%20%20%20%20fontWeight%3A%20'bold'%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>
6<p>Code quality tips:</p>
7<ul>
8<li>By moving styles away from the render function, you're making the code easier to understand.</li>
9<li>Naming the styles is a good way to add meaning to the low level components in the render function, and encourage reuse.</li>
10<li>In most IDEs, using <code>StyleSheet.create()</code> will offer static type checking and suggestions to help you write valid styles.</li>
11</ul>
12<hr>
13<h1>Reference</h1>
14<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>
15<h3 class="anchor anchorWithStickyNavbar_JmGV" id=compose><code>compose()</code><a href=#compose class=hash-link aria-label="Direct link to compose" title="Direct link to compose"></a></h3>
16<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>compose</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">style1</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> </span><span class="token known-class-name class-name" style=color:#fac863>Object</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"> style2</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> </span><span class="token known-class-name class-name" style=color:#fac863>Object</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 known-class-name class-name" style=color:#fac863>Object</span><span class="token plain"> </span><span class="token operator" style=color:#fc929e>|</span><span class="token plain"> </span><span class="token known-class-name class-name" style=color:#fac863>Object</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><br></span></code></pre></div></div>
17<p>Combines two styles such that <code>style2</code> will override any styles in <code>style1</code>. If either style is falsy, the other one is returned without allocating an array, saving allocations and maintaining reference equality for PureComponent checks.</p>
18<div class=snack-player data-snack-name=Compose 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%20from%20'react'%3B%5Cnimport%20%7BStyleSheet%2C%20Text%7D%20from%20'react-native'%3B%5Cnimport%20%7BSafeAreaView%2C%20SafeAreaProvider%7D%20from%20'react-native-safe-area-context'%3B%5Cn%5Cnconst%20App%20%3D%20()%20%3D%3E%20(%5Cn%20%20%3CSafeAreaProvider%3E%5Cn%20%20%20%20%3CSafeAreaView%20style%3D%7Bcontainer%7D%3E%5Cn%20%20%20%20%20%20%3CText%20style%3D%7Btext%7D%3EReact%20Native%3C%2FText%3E%5Cn%20%20%20%20%3C%2FSafeAreaView%3E%5Cn%20%20%3C%2FSafeAreaProvider%3E%5Cn)%3B%5Cn%5Cnconst%20page%20%3D%20StyleSheet.create(%7B%5Cn%20%20container%3A%20%7B%5Cn%20%20%20%20flex%3A%201%2C%5Cn%20%20%20%20padding%3A%2024%2C%5Cn%20%20%20%20backgroundColor%3A%20'%23fff'%2C%5Cn%20%20%7D%2C%5Cn%20%20text%3A%20%7B%5Cn%20%20%20%20fontSize%3A%2030%2C%5Cn%20%20%20%20color%3A%20'%23000'%2C%5Cn%20%20%7D%2C%5Cn%7D)%3B%5Cn%5Cnconst%20lists%20%3D%20StyleSheet.create(%7B%5Cn%20%20listContainer%3A%20%7B%5Cn%20%20%20%20flex%3A%201%2C%5Cn%20%20%20%20backgroundColor%3A%20'%2361dafb'%2C%5Cn%20%20%7D%2C%5Cn%20%20listItem%3A%20%7B%5Cn%20%20%20%20fontWeight%3A%20'bold'%2C%5Cn%20%20%7D%2C%5Cn%7D)%3B%5Cn%5Cnconst%20container%20%3D%20StyleSheet.compose(page.container%2C%20lists.listContainer)%3B%5Cnconst%20text%20%3D%20StyleSheet.compose(page.text%2C%20lists.listItem)%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>
19<hr>
20<h3 class="anchor anchorWithStickyNavbar_JmGV" id=create><code>create()</code><a href=#create class=hash-link aria-label="Direct link to create" title="Direct link to create"></a></h3>
21<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>create</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">styles</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> </span><span class="token known-class-name class-name" style=color:#fac863>Object</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>extends</span><span class="token plain"> </span><span class="token class-name" style=color:#fac863>Record</span><span class="token class-name operator" style=color:#fc929e><</span><span class="token class-name builtin" style=color:#2aa198>string</span><span class="token class-name punctuation" style=color:#657b83>,</span><span class="token class-name" style=color:#fac863> ViewStyle </span><span class="token class-name operator" style=color:#fc929e>|</span><span class="token class-name" style=color:#fac863> ImageStyle </span><span class="token class-name operator" style=color:#fc929e>|</span><span class="token class-name" style=color:#fac863> TextStyle</span><span class="token class-name operator" style=color:#fc929e>></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 known-class-name class-name" style=color:#fac863>Object</span><span class="token punctuation" style=color:#657b83>;</span><br></span></code></pre></div></div>
22<p>An identity function for creating styles. The main practical benefit of creating styles inside <code>StyleSheet.create()</code> is static type checking against native style properties.</p>
23<hr>
24<h3 class="anchor anchorWithStickyNavbar_JmGV" id=flatten><code>flatten()</code><a href=#flatten class=hash-link aria-label="Direct link to flatten" title="Direct link to flatten"></a></h3>
25<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>flatten</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">style</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> </span><span class="token known-class-name class-name" style=color:#fac863>Array</span><span class="token operator" style=color:#fc929e><</span><span class="token known-class-name class-name" style=color:#fac863>Object</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>extends</span><span class="token plain"> </span><span class="token class-name" style=color:#fac863>Record</span><span class="token class-name operator" style=color:#fc929e><</span><span class="token class-name builtin" style=color:#2aa198>string</span><span class="token class-name punctuation" style=color:#657b83>,</span><span class="token class-name" style=color:#fac863> ViewStyle </span><span class="token class-name operator" style=color:#fc929e>|</span><span class="token class-name" style=color:#fac863> ImageStyle </span><span class="token class-name operator" style=color:#fc929e>|</span><span class="token class-name" style=color:#fac863> TextStyle</span><span class="token class-name operator" style=color:#fc929e>></span><span class="token operator" style=color:#fc929e>></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 known-class-name class-name" style=color:#fac863>Object</span><span class="token punctuation" style=color:#657b83>;</span><br></span></code></pre></div></div>
26<p>Flattens an array of style objects, into one aggregated style object.</p>
27<div class=snack-player data-snack-name=Flatten 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%20from%20'react'%3B%5Cnimport%20%7BStyleSheet%2C%20Text%7D%20from%20'react-native'%3B%5Cnimport%20%7BSafeAreaView%2C%20SafeAreaProvider%7D%20from%20'react-native-safe-area-context'%3B%5Cn%5Cnconst%20App%20%3D%20()%20%3D%3E%20(%5Cn%20%20%3CSafeAreaProvider%3E%5Cn%20%20%20%20%3CSafeAreaView%20style%3D%7Bpage.container%7D%3E%5Cn%20%20%20%20%20%20%3CText%20style%3D%7BflattenStyle%7D%3EReact%20Native%3C%2FText%3E%5Cn%20%20%20%20%20%20%3CText%3EFlatten%20Style%3C%2FText%3E%5Cn%20%20%20%20%20%20%3CText%20style%3D%7Bpage.code%7D%3E%7BJSON.stringify(flattenStyle%2C%20null%2C%202)%7D%3C%2FText%3E%5Cn%20%20%20%20%3C%2FSafeAreaView%3E%5Cn%20%20%3C%2FSafeAreaProvider%3E%5Cn)%3B%5Cn%5Cnconst%20page%20%3D%20StyleSheet.create(%7B%5Cn%20%20container%3A%20%7B%5Cn%20%20%20%20flex%3A%201%2C%5Cn%20%20%20%20padding%3A%2024%2C%5Cn%20%20%20%20alignItems%3A%20'center'%2C%5Cn%20%20%7D%2C%5Cn%20%20text%3A%20%7B%5Cn%20%20%20%20color%3A%20'%23000'%2C%5Cn%20%20%20%20fontSize%3A%2014%2C%5Cn%20%20%20%20fontWeight%3A%20'bold'%2C%5Cn%20%20%7D%2C%5Cn%20%20code%3A%20%7B%5Cn%20%20%20%20marginTop%3A%2012%2C%5Cn%20%20%20%20padding%3A%2012%2C%5Cn%20%20%20%20borderRadius%3A%208%2C%5Cn%20%20%20%20color%3A%20'%23666'%2C%5Cn%20%20%20%20backgroundColor%3A%20'%23eaeaea'%2C%5Cn%20%20%7D%2C%5Cn%7D)%3B%5Cn%5Cnconst%20typography%20%3D%20StyleSheet.create(%7B%5Cn%20%20header%3A%20%7B%5Cn%20%20%20%20color%3A%20'%2361dafb'%2C%5Cn%20%20%20%20fontSize%3A%2030%2C%5Cn%20%20%20%20marginBottom%3A%2036%2C%5Cn%20%20%7D%2C%5Cn%7D)%3B%5Cn%5Cnconst%20flattenStyle%20%3D%20StyleSheet.flatten(%5Bpage.text%2C%20typography.header%5D)%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>
28<hr>
29<h3 class="anchor anchorWithStickyNavbar_JmGV" id=setstyleattributepreprocessor><code>setStyleAttributePreprocessor()</code><a href=#setstyleattributepreprocessor class=hash-link aria-label="Direct link to setstyleattributepreprocessor" title="Direct link to setstyleattributepreprocessor"></a></h3>
30<blockquote>
31<p><strong>WARNING: EXPERIMENTAL.</strong> Breaking changes will probably happen a lot and will not be reliably announced. The whole thing might be deleted, who knows? Use at your own risk.</p>
32</blockquote>
33<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>setStyleAttributePreprocessor</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"> property</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> </span><span class="token builtin" style=color:#2aa198>string</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>process</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 plain">propValue</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> </span><span class="token builtin" style=color:#2aa198>any</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 builtin" style=color:#2aa198>any</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 punctuation" style=color:#657b83>;</span><br></span></code></pre></div></div>
34<p>Sets a function to use to pre-process a style property value. This is used internally to process color and transform values. You should not use this unless you really know what you are doing and have exhausted other options.</p>
35<h2 class="anchor anchorWithStickyNavbar_JmGV" id=properties>Properties<a href=#properties class=hash-link aria-label="Direct link to Properties" title="Direct link to Properties"></a></h2>
36<hr>
37<h3 class="anchor anchorWithStickyNavbar_JmGV" id=absolutefill><code>absoluteFill</code><a href=#absolutefill class=hash-link aria-label="Direct link to absolutefill" title="Direct link to absolutefill"></a></h3>
38<p>A very common pattern is to create overlays with position absolute and zero positioning (<code>position: 'absolute', left: 0, right: 0, top: 0, bottom: 0</code>), so <code>absoluteFill</code> can be used for convenience and to reduce duplication of these repeated styles. If you want, absoluteFill can be used to create a customized entry in a StyleSheet, e.g.:</p>
39<div class=snack-player data-snack-name=absoluteFill 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%20from%20'react'%3B%5Cnimport%20%7BStyleSheet%2C%20Text%2C%20View%7D%20from%20'react-native'%3B%5Cnimport%20%7BSafeAreaView%2C%20SafeAreaProvider%7D%20from%20'react-native-safe-area-context'%3B%5Cn%5Cnconst%20App%20%3D%20()%20%3D%3E%20(%5Cn%20%20%3CSafeAreaProvider%3E%5Cn%20%20%20%20%3CSafeAreaView%20style%3D%7Bstyles.container%7D%3E%5Cn%20%20%20%20%20%20%3CView%20style%3D%7Bstyles.box1%7D%3E%5Cn%20%20%20%20%20%20%20%20%3CText%20style%3D%7Bstyles.text%7D%3E1%3C%2FText%3E%5Cn%20%20%20%20%20%20%3C%2FView%3E%5Cn%20%20%20%20%20%20%3CView%20style%3D%7B%5Bstyles.box2%2C%20StyleSheet.absoluteFill%5D%7D%3E%5Cn%20%20%20%20%20%20%20%20%3CText%20style%3D%7Bstyles.text%7D%3E2%3C%2FText%3E%5Cn%20%20%20%20%20%20%3C%2FView%3E%5Cn%20%20%20%20%20%20%3CView%20style%3D%7Bstyles.box3%7D%3E%5Cn%20%20%20%20%20%20%20%20%3CText%20style%3D%7Bstyles.text%7D%3E3%3C%2FText%3E%5Cn%20%20%20%20%20%20%3C%2FView%3E%5Cn%20%20%20%20%3C%2FSafeAreaView%3E%5Cn%20%20%3C%2FSafeAreaProvider%3E%5Cn)%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%7D%2C%5Cn%20%20box1%3A%20%7B%5Cn%20%20%20%20position%3A%20'absolute'%2C%5Cn%20%20%20%20top%3A%2040%2C%5Cn%20%20%20%20left%3A%2040%2C%5Cn%20%20%20%20width%3A%20100%2C%5Cn%20%20%20%20height%3A%20100%2C%5Cn%20%20%20%20backgroundColor%3A%20'red'%2C%5Cn%20%20%7D%2C%5Cn%20%20box2%3A%20%7B%5Cn%20%20%20%20width%3A%20100%2C%5Cn%20%20%20%20height%3A%20100%2C%5Cn%20%20%20%20backgroundColor%3A%20'blue'%2C%5Cn%20%20%7D%2C%5Cn%20%20box3%3A%20%7B%5Cn%20%20%20%20position%3A%20'absolute'%2C%5Cn%20%20%20%20top%3A%20120%2C%5Cn%20%20%20%20left%3A%20120%2C%5Cn%20%20%20%20width%3A%20100%2C%5Cn%20%20%20%20height%3A%20100%2C%5Cn%20%20%20%20backgroundColor%3A%20'green'%2C%5Cn%20%20%7D%2C%5Cn%20%20text%3A%20%7B%5Cn%20%20%20%20color%3A%20'%23FFF'%2C%5Cn%20%20%20%20fontSize%3A%2080%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>
40<hr>
41<h3 class="anchor anchorWithStickyNavbar_JmGV" id=absolutefillobject><code>absoluteFillObject</code><a href=#absolutefillobject class=hash-link aria-label="Direct link to absolutefillobject" title="Direct link to absolutefillobject"></a></h3>
42<p>Sometimes you may want <code>absoluteFill</code> but with a couple tweaks - <code>absoluteFillObject</code> can be used to create a customized entry in a <code>StyleSheet</code>, e.g.:</p>
43<div class=snack-player data-snack-name=absoluteFillObject 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%20from%20'react'%3B%5Cnimport%20%7BStyleSheet%2C%20Text%2C%20View%7D%20from%20'react-native'%3B%5Cnimport%20%7BSafeAreaView%2C%20SafeAreaProvider%7D%20from%20'react-native-safe-area-context'%3B%5Cn%5Cnconst%20App%20%3D%20()%20%3D%3E%20(%5Cn%20%20%3CSafeAreaProvider%3E%5Cn%20%20%20%20%3CSafeAreaView%20style%3D%7Bstyles.container%7D%3E%5Cn%20%20%20%20%20%20%3CView%20style%3D%7Bstyles.box1%7D%3E%5Cn%20%20%20%20%20%20%20%20%3CText%20style%3D%7Bstyles.text%7D%3E1%3C%2FText%3E%5Cn%20%20%20%20%20%20%3C%2FView%3E%5Cn%20%20%20%20%20%20%3CView%20style%3D%7Bstyles.box2%7D%3E%5Cn%20%20%20%20%20%20%20%20%3CText%20style%3D%7Bstyles.text%7D%3E2%3C%2FText%3E%5Cn%20%20%20%20%20%20%3C%2FView%3E%5Cn%20%20%20%20%20%20%3CView%20style%3D%7Bstyles.box3%7D%3E%5Cn%20%20%20%20%20%20%20%20%3CText%20style%3D%7Bstyles.text%7D%3E3%3C%2FText%3E%5Cn%20%20%20%20%20%20%3C%2FView%3E%5Cn%20%20%20%20%3C%2FSafeAreaView%3E%5Cn%20%20%3C%2FSafeAreaProvider%3E%5Cn)%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%7D%2C%5Cn%20%20box1%3A%20%7B%5Cn%20%20%20%20position%3A%20'absolute'%2C%5Cn%20%20%20%20top%3A%2040%2C%5Cn%20%20%20%20left%3A%2040%2C%5Cn%20%20%20%20width%3A%20100%2C%5Cn%20%20%20%20height%3A%20100%2C%5Cn%20%20%20%20backgroundColor%3A%20'red'%2C%5Cn%20%20%7D%2C%5Cn%20%20box2%3A%20%7B%5Cn%20%20%20%20...StyleSheet.absoluteFillObject%2C%5Cn%20%20%20%20top%3A%20120%2C%5Cn%20%20%20%20left%3A%2050%2C%5Cn%20%20%20%20width%3A%20100%2C%5Cn%20%20%20%20height%3A%20100%2C%5Cn%20%20%20%20backgroundColor%3A%20'blue'%2C%5Cn%20%20%7D%2C%5Cn%20%20box3%3A%20%7B%5Cn%20%20%20%20...StyleSheet.absoluteFillObject%2C%5Cn%20%20%20%20top%3A%20120%2C%5Cn%20%20%20%20left%3A%20120%2C%5Cn%20%20%20%20width%3A%20100%2C%5Cn%20%20%20%20height%3A%20100%2C%5Cn%20%20%20%20backgroundColor%3A%20'green'%2C%5Cn%20%20%7D%2C%5Cn%20%20text%3A%20%7B%5Cn%20%20%20%20color%3A%20'%23FFF'%2C%5Cn%20%20%20%20fontSize%3A%2080%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>
44<hr>
45<h3 class="anchor anchorWithStickyNavbar_JmGV" id=hairlinewidth><code>hairlineWidth</code><a href=#hairlinewidth class=hash-link aria-label="Direct link to hairlinewidth" title="Direct link to hairlinewidth"></a></h3>
46<p>This is defined as the width of a thin line on the platform. It can be used as the thickness of a border or division between two elements. Example:</p>
47<div class=snack-player data-snack-name=hairlineWidth 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%20from%20'react'%3B%5Cnimport%20%7BStyleSheet%2C%20Text%2C%20View%7D%20from%20'react-native'%3B%5Cn%5Cnconst%20App%20%3D%20()%20%3D%3E%20(%5Cn%20%20%3CView%20style%3D%7Bstyles.container%7D%3E%5Cn%20%20%20%20%3CText%20style%3D%7Bstyles.row%7D%3EReact%3C%2FText%3E%5Cn%20%20%20%20%3CText%20style%3D%7Bstyles.row%7D%3ENative%3C%2FText%3E%5Cn%20%20%3C%2FView%3E%5Cn)%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%20padding%3A%2024%2C%5Cn%20%20%7D%2C%5Cn%20%20row%3A%20%7B%5Cn%20%20%20%20padding%3A%204%2C%5Cn%20%20%20%20borderBottomColor%3A%20'red'%2C%5Cn%20%20%20%20borderBottomWidth%3A%20StyleSheet.hairlineWidth%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>
48<p>This constant will always be a round number of pixels (so a line defined by it can look crisp) and will try to match the standard width of a thin line on the underlying platform. However, you should not rely on it being a constant size, because on different platforms and screen densities its value may be calculated differently.</p>
49<p>A line with hairline width may not be visible if your simulator is downscaled.</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/stylesheet.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 18.4h-6.3v-6.2z"/></g></svg>Edit page for next release</a><a href=https://github.com/facebook/react-native-website/edit/main/website/versioned_docs/version-0.79/stylesheet.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 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class="table-of-contents__link toc-highlight">Methods</a><ul><li><a href=#compose class="table-of-contents__link toc-highlight"><code>compose()</code></a><li><a href=#create class="table-of-contents__link toc-highlight"><code>create()</code></a><li><a href=#flatten class="table-of-contents__link toc-highlight"><code>flatten()</code></a><li><a href=#setstyleattributepreprocessor class="table-of-contents__link toc-highlight"><code>setStyleAttributePreprocessor()</code></a></ul><li><a href=#properties class="table-of-contents__link toc-highlight">Properties</a><ul><li><a href=#absolutefill class="table-of-contents__link toc-highlight"><code>absoluteFill</code></a><li><a href=#absolutefillobject class="table-of-contents__link toc-highlight"><code>absoluteFillObject</code></a><li><a href=#hairlinewidth class="table-of-contents__link toc-highlight"><code>hairlineWidth</code></a></ul></ul></div></div></div></div></main></div></div></div><footer class="theme-layout-footer footer 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