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<!DOCTYPE html><html><head><title>StyleSheet</title><meta charset="utf-8"><meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"><meta name="viewport" content="width=device-width"><meta property="fb:app_id" content="1677033832619985"><meta property="fb:admins" content="121800083"><meta property="og:site_name" content="React Native"><meta property="og:title" content="StyleSheet"><meta property="og:url" content="https://facebook.github.io/react-native/index.html"><meta property="og:image" content="https://facebook.github.io/react-native/img/opengraph.png"><meta property="og:description" content="A framework for building native apps using React"><meta name="twitter:site" content="@reactnative"><meta name="twitter:card" content="summary_large_image"><meta property="og:type" content="website"><base href="/react-native/"><link rel="stylesheet" href="https://cdn.jsdelivr.net/docsearch.js/1/docsearch.min.css"><link rel="shortcut icon" href="img/favicon.png?2"><link rel="stylesheet" href="css/react-native.css"><link rel="stylesheet" href="css/prism.css"><link rel="alternate" type="application/rss+xml" title="React Native Blog" href="https://facebook.github.io/react-native/blog/feed.xml"><link href="//cdn-images.mailchimp.com/embedcode/horizontal-slim-10_7.css" rel="stylesheet" type="text/css"><script type="text/javascript" src="//use.typekit.net/vqa1hcx.js"></script><script type="text/javascript">try{Typekit.load();}catch(e){}</script></head><body><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'));</script><script>window.twttr=(function(d,s, id){var js,fjs=d.getElementsByTagName(s)[0],t=window.twttr||{};if(d.getElementById(id))return t;js=d.createElement(s);js.id=id;js.src='https://platform.twitter.com/widgets.js';fjs.parentNode.insertBefore(js, fjs);t._e = [];t.ready = function(f) {t._e.push(f);};return t;}(document, 'script', 'twitter-wjs'));</script><div class="container"><div class="nav-main"><div class="wrap"><a class="nav-home" href=""><img src="img/header_logo.png">React Native</a><a class="nav-version" href="/react-native/versions.html">0.48</a><div class="nav-site-wrapper"><ul class="nav-site nav-site-internal"><li><a href="docs/getting-started.html" class="active" data-target=".nav-docs">Docs</a></li><li><a href="/react-native/support.html" class="">Help</a></li><li><a href="/react-native/blog/" class="">Blog</a></li></ul><div class="algolia-search-wrapper"><input id="algolia-doc-search" tabindex="0" type="text" placeholder="Search docs..."></div><ul class="nav-site nav-site-external"><li><a href="https://github.com/facebook/react-native" class="">GitHub</a></li><li><a href="http://facebook.github.io/react" class="">React</a></li></ul></div></div></div><section class="content wrap documentationContent"><div class="nav-docs"><div class="nav-docs-viewport"><div class="nav-docs-section"><h3>The Basics</h3><ul><li><a style="margin-left:10px;" class="" href="docs/getting-started.html">Getting Started</a></li><li><a style="margin-left:10px;" class="" href="docs/tutorial.html">Learn the Basics</a></li><li><a style="margin-left:10px;" class="" href="docs/props.html">Props</a></li><li><a style="margin-left:10px;" class="" href="docs/state.html">State</a></li><li><a style="margin-left:10px;" class="" href="docs/style.html">Style</a></li><li><a style="margin-left:10px;" class="" href="docs/height-and-width.html">Height and Width</a></li><li><a style="margin-left:10px;" class="" href="docs/flexbox.html">Layout with Flexbox</a></li><li><a style="margin-left:10px;" class="" href="docs/handling-text-input.html">Handling Text Input</a></li><li><a style="margin-left:10px;" class="" href="docs/handling-touches.html">Handling Touches</a></li><li><a style="margin-left:10px;" class="" href="docs/using-a-scrollview.html">Using a ScrollView</a></li><li><a style="margin-left:10px;" class="" href="docs/using-a-listview.html">Using List Views</a></li><li><a style="margin-left:10px;" class="" href="docs/network.html">Networking</a></li><li><a style="margin-left:10px;" class="" href="docs/more-resources.html">More Resources</a></li></ul></div><div class="nav-docs-section"><h3>Guides</h3><ul><li><a style="margin-left:10px;" class="" href="docs/components-and-apis.html">Components and APIs</a></li><li><a style="margin-left:10px;" class="" href="docs/platform-specific-code.html">Platform Specific Code</a></li><li><a style="margin-left:10px;" class="" href="docs/navigation.html">Navigating Between Screens</a></li><li><a style="margin-left:10px;" class="" href="docs/images.html">Images</a></li><li><a style="margin-left:10px;" class="" href="docs/animations.html">Animations</a></li><li><a style="margin-left:10px;" class="" href="docs/accessibility.html">Accessibility</a></li><li><a style="margin-left:10px;" class="" href="docs/timers.html">Timers</a></li><li><a style="margin-left:10px;" class="" href="docs/debugging.html">Debugging</a></li><li><a style="margin-left:10px;" class="" href="docs/performance.html">Performance</a></li><li><a style="margin-left:10px;" class="" href="docs/gesture-responder-system.html">Gesture Responder System</a></li><li><a style="margin-left:10px;" class="" href="docs/javascript-environment.html">JavaScript Environment</a></li><li><a style="margin-left:10px;" class="" href="docs/direct-manipulation.html">Direct Manipulation</a></li><li><a style="margin-left:10px;" class="" href="docs/colors.html">Color Reference</a></li><li><a style="margin-left:10px;" class="" href="docs/integration-with-existing-apps.html">Integration With Existing Apps</a></li><li><a style="margin-left:10px;" class="" href="docs/running-on-device.html">Running On Device</a></li><li><a style="margin-left:10px;" class="" href="docs/upgrading.html">Upgrading to new React Native versions</a></li></ul></div><div class="nav-docs-section"><h3>Guides (iOS)</h3><ul><li><a style="margin-left:10px;" class="" href="docs/native-modules-ios.html">Native Modules</a></li><li><a style="margin-left:10px;" class="" href="docs/native-components-ios.html">Native UI Components</a></li><li><a style="margin-left:10px;" class="" href="docs/linking-libraries-ios.html">Linking Libraries</a></li><li><a style="margin-left:10px;" class="" href="docs/running-on-simulator-ios.html">Running On Simulator</a></li><li><a style="margin-left:10px;" class="" href="docs/communication-ios.html">Communication between native and React Native</a></li><li><a style="margin-left:10px;" class="" href="docs/building-for-apple-tv.html">Building For Apple TV</a></li><li><a style="margin-left:10px;" class="" href="docs/app-extensions.html">App Extensions</a></li></ul></div><div class="nav-docs-section"><h3>Guides (Android)</h3><ul><li><a style="margin-left:10px;" class="" href="docs/native-modules-android.html">Native Modules</a></li><li><a style="margin-left:10px;" class="" href="docs/native-components-android.html">Native UI Components</a></li><li><a style="margin-left:10px;" class="" href="docs/headless-js-android.html">Headless JS</a></li><li><a style="margin-left:10px;" class="" href="docs/signed-apk-android.html">Generating Signed APK</a></li><li><a style="margin-left:10px;" class="" href="docs/android-building-from-source.html">Building React Native from source</a></li></ul></div><div class="nav-docs-section"><h3>Contributing</h3><ul><li><a style="margin-left:10px;" class="" href="docs/contributing.html">How to Contribute</a></li><li><a style="margin-left:10px;" class="" href="docs/testing.html">Testing your Changes</a></li><li><a style="margin-left:10px;" class="" href="docs/maintainers.html">What to Expect from Maintainers</a></li><li><a style="margin-left:10px;" class="" href="docs/understanding-cli.html">Understanding the CLI</a></li></ul></div><div class="nav-docs-section"><h3>components</h3><ul><li><a style="margin-left:10px;" class="" href="docs/activityindicator.html">ActivityIndicator</a></li><li><a style="margin-left:10px;" class="" href="docs/button.html">Button</a></li><li><a style="margin-left:10px;" class="" href="docs/datepickerios.html">DatePickerIOS</a></li><li><a style="margin-left:10px;" class="" href="docs/drawerlayoutandroid.html">DrawerLayoutAndroid</a></li><li><a style="margin-left:10px;" class="" href="docs/flatlist.html">FlatList</a></li><li><a style="margin-left:10px;" class="" href="docs/image.html">Image</a></li><li><a style="margin-left:10px;" class="" href="docs/keyboardavoidingview.html">KeyboardAvoidingView</a></li><li><a style="margin-left:10px;" class="" href="docs/listview.html">ListView</a></li><li><a style="margin-left:10px;" class="" href="docs/maskedviewios.html">MaskedViewIOS</a></li><li><a style="margin-left:10px;" class="" href="docs/modal.html">Modal</a></li><li><a style="margin-left:10px;" class="" href="docs/navigatorios.html">NavigatorIOS</a></li><li><a style="margin-left:10px;" class="" href="docs/picker.html">Picker</a></li><li><a style="margin-left:10px;" class="" href="docs/pickerios.html">PickerIOS</a></li><li><a style="margin-left:10px;" class="" href="docs/progressbarandroid.html">ProgressBarAndroid</a></li><li><a style="margin-left:10px;" class="" href="docs/progressviewios.html">ProgressViewIOS</a></li><li><a style="margin-left:10px;" class="" href="docs/refreshcontrol.html">RefreshControl</a></li><li><a style="margin-left:10px;" class="" href="docs/scrollview.html">ScrollView</a></li><li><a style="margin-left:10px;" class="" href="docs/sectionlist.html">SectionList</a></li><li><a style="margin-left:10px;" class="" href="docs/segmentedcontrolios.html">SegmentedControlIOS</a></li><li><a style="margin-left:10px;" class="" href="docs/slider.html">Slider</a></li><li><a style="margin-left:10px;" class="" href="docs/snapshotviewios.html">SnapshotViewIOS</a></li><li><a style="margin-left:10px;" class="" href="docs/statusbar.html">StatusBar</a></li><li><a style="margin-left:10px;" class="" href="docs/switch.html">Switch</a></li><li><a style="margin-left:10px;" class="" href="docs/tabbarios.html">TabBarIOS</a></li><li><a style="margin-left:10px;" class="" href="docs/tabbarios-item.html">TabBarIOS.Item</a></li><li><a style="margin-left:10px;" class="" href="docs/text.html">Text</a></li><li><a style="margin-left:10px;" class="" href="docs/textinput.html">TextInput</a></li><li><a style="margin-left:10px;" class="" href="docs/toolbarandroid.html">ToolbarAndroid</a></li><li><a style="margin-left:10px;" class="" href="docs/touchablehighlight.html">TouchableHighlight</a></li><li><a style="margin-left:10px;" class="" href="docs/touchablenativefeedback.html">TouchableNativeFeedback</a></li><li><a style="margin-left:10px;" class="" href="docs/touchableopacity.html">TouchableOpacity</a></li><li><a style="margin-left:10px;" class="" href="docs/touchablewithoutfeedback.html">TouchableWithoutFeedback</a></li><li><a style="margin-left:10px;" class="" href="docs/view.html">View</a></li><li><a style="margin-left:10px;" class="" href="docs/viewpagerandroid.html">ViewPagerAndroid</a></li><li><a style="margin-left:10px;" class="" href="docs/virtualizedlist.html">VirtualizedList</a></li><li><a style="margin-left:10px;" class="" href="docs/webview.html">WebView</a></li></ul></div><div class="nav-docs-section"><h3>APIs</h3><ul><li><a style="margin-left:10px;" class="" href="docs/accessibilityinfo.html">AccessibilityInfo</a></li><li><a style="margin-left:10px;" class="" href="docs/actionsheetios.html">ActionSheetIOS</a></li><li><a style="margin-left:10px;" class="" href="docs/alert.html">Alert</a></li><li><a style="margin-left:10px;" class="" href="docs/alertios.html">AlertIOS</a></li><li><a style="margin-left:10px;" class="" href="docs/animated.html">Animated</a></li><li><a style="margin-left:10px;" class="" href="docs/appregistry.html">AppRegistry</a></li><li><a style="margin-left:10px;" class="" href="docs/appstate.html">AppState</a></li><li><a style="margin-left:10px;" class="" href="docs/asyncstorage.html">AsyncStorage</a></li><li><a style="margin-left:10px;" class="" href="docs/backandroid.html">BackAndroid</a></li><li><a style="margin-left:10px;" class="" href="docs/backhandler.html">BackHandler</a></li><li><a style="margin-left:10px;" class="" href="docs/cameraroll.html">CameraRoll</a></li><li><a style="margin-left:10px;" class="" href="docs/clipboard.html">Clipboard</a></li><li><a style="margin-left:10px;" class="" href="docs/datepickerandroid.html">DatePickerAndroid</a></li><li><a style="margin-left:10px;" class="" href="docs/dimensions.html">Dimensions</a></li><li><a style="margin-left:10px;" class="" href="docs/easing.html">Easing</a></li><li><a style="margin-left:10px;" class="" href="docs/geolocation.html">Geolocation</a></li><li><a style="margin-left:10px;" class="" href="docs/imageeditor.html">ImageEditor</a></li><li><a style="margin-left:10px;" class="" href="docs/imagepickerios.html">ImagePickerIOS</a></li><li><a style="margin-left:10px;" class="" href="docs/imagestore.html">ImageStore</a></li><li><a style="margin-left:10px;" class="" href="docs/interactionmanager.html">InteractionManager</a></li><li><a style="margin-left:10px;" class="" href="docs/keyboard.html">Keyboard</a></li><li><a style="margin-left:10px;" class="" href="docs/layoutanimation.html">LayoutAnimation</a></li><li><a style="margin-left:10px;" class="" href="docs/linking.html">Linking</a></li><li><a style="margin-left:10px;" class="" href="docs/netinfo.html">NetInfo</a></li><li><a style="margin-left:10px;" class="" href="docs/panresponder.html">PanResponder</a></li><li><a style="margin-left:10px;" class="" href="docs/permissionsandroid.html">PermissionsAndroid</a></li><li><a style="margin-left:10px;" class="" href="docs/pixelratio.html">PixelRatio</a></li><li><a style="margin-left:10px;" class="" href="docs/pushnotificationios.html">PushNotificationIOS</a></li><li><a style="margin-left:10px;" class="" href="docs/settings.html">Settings</a></li><li><a style="margin-left:10px;" class="" href="docs/share.html">Share</a></li><li><a style="margin-left:10px;" class="" href="docs/statusbarios.html">StatusBarIOS</a></li><li><a style="margin-left:10px;" class="active" href="docs/stylesheet.html">StyleSheet</a></li><li><a style="margin-left:10px;" class="" href="docs/systrace.html">Systrace</a></li><li><a style="margin-left:10px;" class="" href="docs/timepickerandroid.html">TimePickerAndroid</a></li><li><a style="margin-left:10px;" class="" href="docs/toastandroid.html">ToastAndroid</a></li><li><a style="margin-left:10px;" class="" href="docs/vibration.html">Vibration</a></li><li><a style="margin-left:10px;" class="" href="docs/vibrationios.html">VibrationIOS</a></li><li><a style="margin-left:10px;" class="" href="docs/layout-props.html">Layout Props</a></li><li><a style="margin-left:10px;" class="" href="docs/shadow-props.html">Shadow Props</a></li><li><a style="margin-left:10px;" class="" href="docs/viewproptypes.html">ViewPropTypes</a></li><li><a style="margin-left:10px;" class="" href="docs/viewstyleproptypes.html">ViewStylePropTypes</a></li><li><a style="margin-left:10px;" class="" href="docs/textstyleproptypes.html">TextStylePropTypes</a></li><li><a style="margin-left:10px;" class="" href="docs/imagestyleproptypes.html">ImageStylePropTypes</a></li></ul></div></div></div><div class="inner-content"><a id="content"></a><h1><a class="anchor" name="stylesheet"></a>StyleSheet <a class="hash-link" href="docs/stylesheet.html#stylesheet">#</a></h1><div><div><p>A StyleSheet is an abstraction similar to CSS StyleSheets</p><p>Create a new StyleSheet:</p><div class="prism language-javascript"><span class="token keyword">var</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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borderRadius<span class="token punctuation">:</span> <span class="token number">4</span><span class="token punctuation">,</span>
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borderWidth<span class="token punctuation">:</span> <span class="token number">0.5</span><span class="token punctuation">,</span>
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borderColor<span class="token punctuation">:</span> <span class="token string">'#d6d7da'</span><span class="token punctuation">,</span>
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<span class="token punctuation">}</span><span class="token punctuation">,</span>
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title<span class="token punctuation">:</span> <span class="token punctuation">{</span>
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fontSize<span class="token punctuation">:</span> <span class="token number">19</span><span class="token punctuation">,</span>
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fontWeight<span class="token punctuation">:</span> <span class="token string">'bold'</span><span class="token punctuation">,</span>
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<span class="token punctuation">}</span><span class="token punctuation">,</span>
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activeTitle<span class="token punctuation">:</span> <span class="token punctuation">{</span>
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color<span class="token punctuation">:</span> <span class="token string">'red'</span><span class="token punctuation">,</span>
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<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></div><p>Use a StyleSheet:</p><div class="prism language-javascript"><span class="token operator"><</span>View style<span class="token operator">=</span><span class="token punctuation">{</span>styles<span class="token punctuation">.</span>container<span class="token punctuation">}</span><span class="token operator">></span>
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<span class="token operator"><</span>Text style<span class="token operator">=</span><span class="token punctuation">{</span><span class="token punctuation">[</span>styles<span class="token punctuation">.</span>title<span class="token punctuation">,</span> <span class="token keyword">this</span><span class="token punctuation">.</span>props<span class="token punctuation">.</span>isActive <span class="token operator">&&</span> styles<span class="token punctuation">.</span>activeTitle<span class="token punctuation">]</span><span class="token punctuation">}</span> <span class="token operator">/</span><span class="token operator">></span>
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<span class="token operator"><</span><span class="token operator">/</span>View<span class="token operator">></span></div><p>Code quality:</p><ul><li>By moving styles away from the render function, you're making the code
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easier to understand.</li><li>Naming the styles is a good way to add meaning to the low level components
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in the render function.</li></ul><p>Performance:</p><ul><li>Making a stylesheet from a style object makes it possible to refer to it
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by ID instead of creating a new style object every time.</li><li>It also allows to send the style only once through the bridge. All
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subsequent uses are going to refer an id (not implemented yet).</li></ul></div><span><h3><a class="anchor" name="methods"></a>Methods <a class="hash-link" href="docs/stylesheet.html#methods">#</a></h3><div class="props"><div class="prop"><h4 class="methodTitle"><a class="anchor" name="setstyleattributepreprocessor"></a><span class="methodType">static </span>setStyleAttributePreprocessor<span class="methodType">(property, process)</span> <a class="hash-link" href="docs/stylesheet.html#setstyleattributepreprocessor">#</a></h4><div><p>WARNING: EXPERIMENTAL. Breaking changes will probably happen a lot and will
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not be reliably announced. The whole thing might be deleted, who knows? Use
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at your own risk.</p><p>Sets a function to use to pre-process a style property value. This is used
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internally to process color and transform values. You should not use this
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unless you really know what you are doing and have exhausted other options.</p></div></div><div class="prop"><h4 class="methodTitle"><a class="anchor" name="create"></a><span class="methodType">static </span>create<span class="methodType">(obj)</span> <a class="hash-link" href="docs/stylesheet.html#create">#</a></h4><div><p>Creates a StyleSheet style reference from the given object.</p></div></div></div></span><span><h3><a class="anchor" name="properties"></a>Properties <a class="hash-link" href="docs/stylesheet.html#properties">#</a></h3><div class="props"><div class="prop"><h4 class="propTitle"><a class="anchor" name="hairlinewidth"></a>hairlineWidth<span class="propType">: CallExpression</span> <a class="hash-link" href="docs/stylesheet.html#hairlinewidth">#</a></h4><div><p>This is defined as the width of a thin line on the platform. It can be
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used as the thickness of a border or division between two elements.
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Example:</p><div class="prism language-javascript"> <span class="token punctuation">{</span>
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borderBottomColor<span class="token punctuation">:</span> <span class="token string">'#bbb'</span><span class="token punctuation">,</span>
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borderBottomWidth<span class="token punctuation">:</span> StyleSheet<span class="token punctuation">.</span>hairlineWidth
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<span class="token punctuation">}</span></div><p>This constant will always be a round number of pixels (so a line defined
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by it look crisp) and will try to match the standard width of a thin line
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on the underlying platform. However, you should not rely on it being a
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constant size, because on different platforms and screen densities its
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value may be calculated differently.</p><p>A line with hairline width may not be visible if your simulator is downscaled.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="absolutefill"></a>absoluteFill<span class="propType">: CallExpression</span> <a class="hash-link" href="docs/stylesheet.html#absolutefill">#</a></h4><div><p>A very common pattern is to create overlays with position absolute and zero positioning,
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so <code>absoluteFill</code> can be used for convenience and to reduce duplication of these repeated
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styles.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="absolutefillobject"></a>absoluteFillObject<span class="propType">: ObjectExpression</span> <a class="hash-link" href="docs/stylesheet.html#absolutefillobject">#</a></h4><div><p>Sometimes you may want <code>absoluteFill</code> but with a couple tweaks - <code>absoluteFillObject</code> can be
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used to create a customized entry in a <code>StyleSheet</code>, e.g.:</p><p> const styles = StyleSheet.create({
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wrapper: {
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...StyleSheet.absoluteFillObject,
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top: 10,
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backgroundColor: 'transparent',
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},
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});</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="flatten"></a>flatten<span class="propType">: CallExpression</span> <a class="hash-link" href="docs/stylesheet.html#flatten">#</a></h4><div><p>Flattens an array of style objects, into one aggregated style object.
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Alternatively, this method can be used to lookup IDs, returned by
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StyleSheet.register.</p><blockquote><p><strong>NOTE</strong>: Exercise caution as abusing this can tax you in terms of
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optimizations.</p><p>IDs enable optimizations through the bridge and memory in general. Refering
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to style objects directly will deprive you of these optimizations.</p></blockquote><p>Example:</p><div class="prism language-javascript"><span class="token keyword">var</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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listItem<span class="token punctuation">:</span> <span class="token punctuation">{</span>
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flex<span class="token punctuation">:</span> <span class="token number">1</span><span class="token punctuation">,</span>
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fontSize<span class="token punctuation">:</span> <span class="token number">16</span><span class="token punctuation">,</span>
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color<span class="token punctuation">:</span> <span class="token string">'white'</span>
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<span class="token punctuation">}</span><span class="token punctuation">,</span>
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selectedListItem<span class="token punctuation">:</span> <span class="token punctuation">{</span>
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color<span class="token punctuation">:</span> <span class="token string">'green'</span>
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<span class="token punctuation">}</span>
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<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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StyleSheet<span class="token punctuation">.</span><span class="token function">flatten</span><span class="token punctuation">(</span><span class="token punctuation">[</span>styles<span class="token punctuation">.</span>listItem<span class="token punctuation">,</span> styles<span class="token punctuation">.</span>selectedListItem<span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token comment" spellcheck="true">
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// returns { flex: 1, fontSize: 16, color: 'green' }</span></div><p>Alternative use:</p><div class="prism language-javascript">StyleSheet<span class="token punctuation">.</span><span class="token function">flatten</span><span class="token punctuation">(</span>styles<span class="token punctuation">.</span>listItem<span class="token punctuation">)</span><span class="token punctuation">;</span><span class="token comment" spellcheck="true">
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// return { flex: 1, fontSize: 16, color: 'white' }
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</span><span class="token comment" spellcheck="true">// Simply styles.listItem would return its ID (number)</span></div><p>This method internally uses <code>StyleSheetRegistry.getStyleByID(style)</code>
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to resolve style objects represented by IDs. Thus, an array of style
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objects (instances of StyleSheet.create), are individually resolved to,
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their respective objects, merged as one and then returned. This also explains
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the alternative use.</p></div></div></div></span></div><p class="edit-page-block"><a target="_blank" href="https://github.com/facebook/react-native/blob/master/Libraries/StyleSheet/StyleSheet.js">Improve this page</a> by sending a pull request!</p><div class="docs-prevnext"><a class="docs-prev" href="docs/statusbarios.html#content">← Prev</a><a class="docs-next" href="docs/systrace.html#content">Next →</a></div></div></section><footer class="nav-footer"><section class="sitemap"><a href="/react-native" class="nav-home"><img src="img/header_logo.png" alt="React Native" width="66" height="58"></a><div><h5><a href="docs/">Docs</a></h5><a href="docs/getting-started.html">Getting Started</a><a href="docs/tutorial.html">Learn the Basics</a><a href="docs/components-and-apis.html">Components and APIs</a><a href="docs/more-resources.html">More Resources</a></div><div><h5><a href="/react-native/support.html">Community</a></h5><a href="/react-native/showcase.html">Who's using React Native?</a><a href="http://www.meetup.com/topics/react-native/" target="_blank">Meetups</a><a href="https://www.facebook.com/groups/react.native.community" target="_blank">Facebook Group</a><a href="https://twitter.com/reactnative" target="_blank">Twitter</a></div><div><h5><a href="/react-native/support.html">Help</a></h5><a href="http://stackoverflow.com/questions/tagged/react-native" target="_blank">Stack Overflow</a><a href="https://discord.gg/0ZcbPKXt5bZjGY5n">Reactiflux Chat</a><a href="/react-native/versions.html" target="_blank">Latest Releases</a><a href="https://react-native.canny.io/feature-requests" target="_blank">Feature Requests</a></div><div><h5>More</h5><a href="/react-native/blog">Blog</a><a href="http://facebook.github.io/react/" target="_blank">React</a><a href="https://github.com/facebook/react-native" target="_blank">GitHub</a><div class="githubButton"><a class="github-button" href="https://github.com/facebook/react-native" data-icon="octicon-star" data-count-href="/facebook/react-native/stargazers" data-count-api="/repos/facebook/react-native#stargazers_count" data-count-aria-label="# stargazers on GitHub" aria-label="Star facebook/react-native on GitHub">Star</a></div></div></section><section class="newsletter"><div id="mc_embed_signup"><form action="//reactnative.us10.list-manage.com/subscribe/post?u=db0dd948e2b729ee62625b1a8&id=47cd41008f" method="post" id="mc-embedded-subscribe-form" name="mc-embedded-subscribe-form" class="validate" target="_blank" novalidate><div id="mc_embed_signup_scroll"><label for="mce-EMAIL"><h5>Get the React Native Newsletter</h5></label><input type="email" value="" name="EMAIL" class="email" id="mce-EMAIL" placeholder="email address" required><div style="position:absolute;left:-5000px;" aria-hidden="true"><input type="text" name="b_db0dd948e2b729ee62625b1a8_47cd41008f" tabindex="-1" value=""></div><div class="clear"><input type="submit" value="Sign up" name="subscribe" id="mc-embedded-subscribe" class="button"></div></div></form></div></section><a href="https://code.facebook.com/projects/" target="_blank" class="fbOpenSource"><img src="img/oss_logo.png" alt="Facebook Open Source" width="170" height="45"></a><section class="copyright">Copyright © 2017 Facebook Inc.</section></footer></div><div id="fb-root"></div><script type="text/javascript" src="https://cdn.jsdelivr.net/docsearch.js/1/docsearch.min.js"></script><script>
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