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<!DOCTYPE html><html><head><title>SectionList</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="SectionList"><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="active" 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="" 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="sectionlist"></a>SectionList <a class="hash-link" href="docs/sectionlist.html#sectionlist">#</a></h1><div><div><p>A performant interface for rendering sectioned lists, supporting the most handy features:</p><ul><li>Fully cross-platform.</li><li>Configurable viewability callbacks.</li><li>List header support.</li><li>List footer support.</li><li>Item separator support.</li><li>Section header support.</li><li>Section separator support.</li><li>Heterogeneous data and item rendering support.</li><li>Pull to Refresh.</li><li>Scroll loading.</li></ul><p>If you don't need section support and want a simpler interface, use
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<a href="/react-native/docs/flatlist.html" target=""><code><FlatList></code></a>.</p><p>Simple Examples:</p><div class="prism language-javascript"><span class="token operator"><</span>SectionList
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renderItem<span class="token operator">=</span><span class="token punctuation">{</span><span class="token punctuation">(</span><span class="token punctuation">{</span>item<span class="token punctuation">}</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token operator"><</span>ListItem title<span class="token operator">=</span><span class="token punctuation">{</span>item<span class="token punctuation">}</span> <span class="token operator">/</span><span class="token operator">></span><span class="token punctuation">}</span>
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renderSectionHeader<span class="token operator">=</span><span class="token punctuation">{</span><span class="token punctuation">(</span><span class="token punctuation">{</span>section<span class="token punctuation">}</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token operator"><</span>Header title<span class="token operator">=</span><span class="token punctuation">{</span>section<span class="token punctuation">.</span>title<span class="token punctuation">}</span> <span class="token operator">/</span><span class="token operator">></span><span class="token punctuation">}</span>
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sections<span class="token operator">=</span><span class="token punctuation">{</span><span class="token punctuation">[</span><span class="token comment" spellcheck="true"> // homogenous rendering between sections
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</span> <span class="token punctuation">{</span>data<span class="token punctuation">:</span> <span class="token punctuation">[</span><span class="token operator">...</span><span class="token punctuation">]</span><span class="token punctuation">,</span> title<span class="token punctuation">:</span> <span class="token operator">...</span><span class="token punctuation">}</span><span class="token punctuation">,</span>
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<span class="token punctuation">{</span>data<span class="token punctuation">:</span> <span class="token punctuation">[</span><span class="token operator">...</span><span class="token punctuation">]</span><span class="token punctuation">,</span> title<span class="token punctuation">:</span> <span class="token operator">...</span><span class="token punctuation">}</span><span class="token punctuation">,</span>
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<span class="token punctuation">{</span>data<span class="token punctuation">:</span> <span class="token punctuation">[</span><span class="token operator">...</span><span class="token punctuation">]</span><span class="token punctuation">,</span> title<span class="token punctuation">:</span> <span class="token operator">...</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>
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<span class="token operator">/</span><span class="token operator">></span>
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<span class="token operator"><</span>SectionList
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sections<span class="token operator">=</span><span class="token punctuation">{</span><span class="token punctuation">[</span><span class="token comment" spellcheck="true"> // heterogeneous rendering between sections
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</span> <span class="token punctuation">{</span>data<span class="token punctuation">:</span> <span class="token punctuation">[</span><span class="token operator">...</span><span class="token punctuation">]</span><span class="token punctuation">,</span> renderItem<span class="token punctuation">:</span> <span class="token operator">...</span><span class="token punctuation">}</span><span class="token punctuation">,</span>
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<span class="token punctuation">{</span>data<span class="token punctuation">:</span> <span class="token punctuation">[</span><span class="token operator">...</span><span class="token punctuation">]</span><span class="token punctuation">,</span> renderItem<span class="token punctuation">:</span> <span class="token operator">...</span><span class="token punctuation">}</span><span class="token punctuation">,</span>
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<span class="token punctuation">{</span>data<span class="token punctuation">:</span> <span class="token punctuation">[</span><span class="token operator">...</span><span class="token punctuation">]</span><span class="token punctuation">,</span> renderItem<span class="token punctuation">:</span> <span class="token operator">...</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>
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<span class="token operator">/</span><span class="token operator">></span></div><p>This is a convenience wrapper around <a href="docs/virtualizedlist.html" target="_blank"><code><VirtualizedList></code></a>,
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and thus inherits its props (as well as those of <code>ScrollView</code>) that aren't explicitly listed
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here, along with the following caveats:</p><ul><li>Internal state is not preserved when content scrolls out of the render window. Make sure all
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your data is captured in the item data or external stores like Flux, Redux, or Relay.</li><li>This is a <code>PureComponent</code> which means that it will not re-render if <code>props</code> remain shallow-
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equal. Make sure that everything your <code>renderItem</code> function depends on is passed as a prop
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(e.g. <code>extraData</code>) that is not <code>===</code> after updates, otherwise your UI may not update on
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changes. This includes the <code>data</code> prop and parent component state.</li><li>In order to constrain memory and enable smooth scrolling, content is rendered asynchronously
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offscreen. This means it's possible to scroll faster than the fill rate and momentarily see
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blank content. This is a tradeoff that can be adjusted to suit the needs of each application,
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and we are working on improving it behind the scenes.</li><li>By default, the list looks for a <code>key</code> prop on each item and uses that for the React key.
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Alternatively, you can provide a custom <code>keyExtractor</code> prop.</li></ul></div><h3><a class="anchor" name="props"></a>Props <a class="hash-link" href="docs/sectionlist.html#props">#</a></h3><div class="props"><div class="prop"><h4 class="propTitle"><a class="anchor" name="itemseparatorcomponent"></a>ItemSeparatorComponent?: <span class="propType"><span>?ReactClass<any></span></span> <a class="hash-link" href="docs/sectionlist.html#itemseparatorcomponent">#</a></h4><div><p>Rendered in between each item, but not at the top or bottom. By default, <code>highlighted</code>,
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<code>section</code>, and <code>[leading/trailing][Item/Separator]</code> props are provided. <code>renderItem</code> provides
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<code>separators.highlight</code>/<code>unhighlight</code> which will update the <code>highlighted</code> prop, but you can also
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add custom props with <code>separators.updateProps</code>.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="listemptycomponent"></a>ListEmptyComponent?: <span class="propType"><span>?<span><span>ReactClass<any> | </span>React.Element<any></span></span></span> <a class="hash-link" href="docs/sectionlist.html#listemptycomponent">#</a></h4><div><p>Rendered when the list is empty. Can be a React Component Class, a render function, or
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a rendered element.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="listfootercomponent"></a>ListFooterComponent?: <span class="propType"><span>?<span><span>ReactClass<any> | </span>React.Element<any></span></span></span> <a class="hash-link" href="docs/sectionlist.html#listfootercomponent">#</a></h4><div><p>Rendered at the very end of the list. Can be a React Component Class, a render function, or
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a rendered element.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="listheadercomponent"></a>ListHeaderComponent?: <span class="propType"><span>?<span><span>ReactClass<any> | </span>React.Element<any></span></span></span> <a class="hash-link" href="docs/sectionlist.html#listheadercomponent">#</a></h4><div><p>Rendered at the very beginning of the list. Can be a React Component Class, a render function, or
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a rendered element.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="sectionseparatorcomponent"></a>SectionSeparatorComponent?: <span class="propType"><span>?ReactClass<any></span></span> <a class="hash-link" href="docs/sectionlist.html#sectionseparatorcomponent">#</a></h4><div><p>Rendered at the top and bottom of each section (note this is different from
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<code>ItemSeparatorComponent</code> which is only rendered between items). These are intended to separate
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sections from the headers above and below and typically have the same highlight response as
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<code>ItemSeparatorComponent</code>. Also receives <code>highlighted</code>, <code>[leading/trailing][Item/Separator]</code>,
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and any custom props from <code>separators.updateProps</code>.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="extradata"></a>extraData?: <span class="propType">any</span> <a class="hash-link" href="docs/sectionlist.html#extradata">#</a></h4><div><p>A marker property for telling the list to re-render (since it implements <code>PureComponent</code>). If
|
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any of your <code>renderItem</code>, Header, Footer, etc. functions depend on anything outside of the
|
|
<code>data</code> prop, stick it here and treat it immutably.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="initialnumtorender"></a>initialNumToRender: <span class="propType">number</span> <a class="hash-link" href="docs/sectionlist.html#initialnumtorender">#</a></h4><div><p>How many items to render in the initial batch. This should be enough to fill the screen but not
|
|
much more. Note these items will never be unmounted as part of the windowed rendering in order
|
|
to improve perceived performance of scroll-to-top actions.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="inverted"></a>inverted?: <span class="propType"><span>?boolean</span></span> <a class="hash-link" href="docs/sectionlist.html#inverted">#</a></h4><div><p>Reverses the direction of scroll. Uses scale transforms of -1.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="keyextractor"></a>keyExtractor: <span class="propType">(item: Item, index: number) => string</span> <a class="hash-link" href="docs/sectionlist.html#keyextractor">#</a></h4><div><p>Used to extract a unique key for a given item at the specified index. Key is used for caching
|
|
and as the react key to track item re-ordering. The default extractor checks item.key, then
|
|
falls back to using the index, like react does. Note that this sets keys for each item, but
|
|
each overall section still needs its own key.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="legacyimplementation"></a>legacyImplementation?: <span class="propType"><span>?boolean</span></span> <a class="hash-link" href="docs/sectionlist.html#legacyimplementation">#</a></h4></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="onendreached"></a>onEndReached?: <span class="propType"><span>?(info: {distanceFromEnd: number}) => void</span></span> <a class="hash-link" href="docs/sectionlist.html#onendreached">#</a></h4><div><p>Called once when the scroll position gets within <code>onEndReachedThreshold</code> of the rendered
|
|
content.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="onendreachedthreshold"></a>onEndReachedThreshold?: <span class="propType"><span>?number</span></span> <a class="hash-link" href="docs/sectionlist.html#onendreachedthreshold">#</a></h4><div><p>How far from the end (in units of visible length of the list) the bottom edge of the
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|
list must be from the end of the content to trigger the <code>onEndReached</code> callback.
|
|
Thus a value of 0.5 will trigger <code>onEndReached</code> when the end of the content is
|
|
within half the visible length of the list.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="onrefresh"></a>onRefresh?: <span class="propType"><span>?() => void</span></span> <a class="hash-link" href="docs/sectionlist.html#onrefresh">#</a></h4><div><p>If provided, a standard RefreshControl will be added for "Pull to Refresh" functionality. Make
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|
sure to also set the <code>refreshing</code> prop correctly.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="onviewableitemschanged"></a>onViewableItemsChanged?: <span class="propType"><span>?(info: {
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|
viewableItems: Array<ViewToken>,
|
|
changed: Array<ViewToken>,
|
|
}) => void</span></span> <a class="hash-link" href="docs/sectionlist.html#onviewableitemschanged">#</a></h4><div><p>Called when the viewability of rows changes, as defined by the
|
|
<code>viewabilityConfig</code> prop.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="refreshing"></a>refreshing?: <span class="propType"><span>?boolean</span></span> <a class="hash-link" href="docs/sectionlist.html#refreshing">#</a></h4><div><p>Set this true while waiting for new data from a refresh.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="removeclippedsubviews"></a>removeClippedSubviews?: <span class="propType">boolean</span> <a class="hash-link" href="docs/sectionlist.html#removeclippedsubviews">#</a></h4><div><p>Note: may have bugs (missing content) in some circumstances - use at your own risk.</p><p>This may improve scroll performance for large lists.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="renderitem"></a>renderItem: <span class="propType">(info: {
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|
item: Item,
|
|
index: number,
|
|
section: SectionT,
|
|
separators: {
|
|
highlight: () => void,
|
|
unhighlight: () => void,
|
|
updateProps: (select: 'leading' | 'trailing', newProps: Object) => void,
|
|
},
|
|
}) => ?React.Element<any></span> <a class="hash-link" href="docs/sectionlist.html#renderitem">#</a></h4><div><p>Default renderer for every item in every section. Can be over-ridden on a per-section basis.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="rendersectionfooter"></a>renderSectionFooter?: <span class="propType"><span>?(info: {section: SectionT}) => ?React.Element<any></span></span> <a class="hash-link" href="docs/sectionlist.html#rendersectionfooter">#</a></h4><div><p>Rendered at the bottom of each section.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="rendersectionheader"></a>renderSectionHeader?: <span class="propType"><span>?(info: {section: SectionT}) => ?React.Element<any></span></span> <a class="hash-link" href="docs/sectionlist.html#rendersectionheader">#</a></h4><div><p>Rendered at the top of each section. These stick to the top of the <code>ScrollView</code> by default on
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|
iOS. See <code>stickySectionHeadersEnabled</code>.</p></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="sections"></a>sections: <span class="propType">$ReadOnlyArray<SectionT></span> <a class="hash-link" href="docs/sectionlist.html#sections">#</a></h4><div><p>The actual data to render, akin to the <code>data</code> prop in <a href="/react-native/docs/flatlist.html" target=""><code><FlatList></code></a>.</p><p>General shape:</p><div class="prism language-javascript">sections<span class="token punctuation">:</span> $ReadOnlyArray<span class="token operator"><</span><span class="token punctuation">{</span>
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|
data<span class="token punctuation">:</span> $ReadOnlyArray<span class="token operator"><</span>SectionItem<span class="token operator">></span><span class="token punctuation">,</span>
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|
renderItem<span class="token operator">?</span><span class="token punctuation">:</span> <span class="token punctuation">(</span><span class="token punctuation">{</span>item<span class="token punctuation">:</span> SectionItem<span class="token punctuation">,</span> <span class="token operator">...</span><span class="token punctuation">}</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token operator">?</span>React<span class="token punctuation">.</span>Element<span class="token operator"><</span><span class="token operator">*</span><span class="token operator">></span><span class="token punctuation">,</span>
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|
ItemSeparatorComponent<span class="token operator">?</span><span class="token punctuation">:</span> <span class="token operator">?</span>ReactClass<span class="token operator"><</span><span class="token punctuation">{</span>highlighted<span class="token punctuation">:</span> boolean<span class="token punctuation">,</span> <span class="token operator">...</span><span class="token punctuation">}</span><span class="token operator">></span><span class="token punctuation">,</span>
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<span class="token punctuation">}</span><span class="token operator">></span></div></div></div><div class="prop"><h4 class="propTitle"><a class="anchor" name="stickysectionheadersenabled"></a>stickySectionHeadersEnabled?: <span class="propType">boolean</span> <a class="hash-link" href="docs/sectionlist.html#stickysectionheadersenabled">#</a></h4><div><p>Makes section headers stick to the top of the screen until the next one pushes it off. Only
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enabled by default on iOS because that is the platform standard there.</p></div></div></div><span><h3><a class="anchor" name="methods"></a>Methods <a class="hash-link" href="docs/sectionlist.html#methods">#</a></h3><div class="props"><div class="prop"><h4 class="methodTitle"><a class="anchor" name="scrolltolocation"></a>scrollToLocation<span class="methodType">(params: object)</span> <a class="hash-link" href="docs/sectionlist.html#scrolltolocation">#</a></h4><div><p>Scrolls to the item at the specified <code>sectionIndex</code> and <code>itemIndex</code> (within the section)
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positioned in the viewable area such that <code>viewPosition</code> 0 places it at the top (and may be
|
|
covered by a sticky header), 1 at the bottom, and 0.5 centered in the middle. <code>viewOffset</code> is a
|
|
fixed number of pixels to offset the final target position, e.g. to compensate for sticky
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|
headers.</p><p>Note: cannot scroll to locations outside the render window without specifying the
|
|
<code>getItemLayout</code> prop.</p></div></div><div class="prop"><h4 class="methodTitle"><a class="anchor" name="recordinteraction"></a>recordInteraction<span class="methodType">()</span> <a class="hash-link" href="docs/sectionlist.html#recordinteraction">#</a></h4><div><p>Tells the list an interaction has occured, which should trigger viewability calculations, e.g.
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|
if <code>waitForInteractions</code> is true and the user has not scrolled. This is typically called by
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|
taps on items or by navigation actions.</p></div></div><div class="prop"><h4 class="methodTitle"><a class="anchor" name="flashscrollindicators"></a>flashScrollIndicators<span class="methodType">()</span> <a class="hash-link" href="docs/sectionlist.html#flashscrollindicators">#</a></h4><div><p>Displays the scroll indicators momentarily.</p></div></div></div></span></div><p class="edit-page-block"><a target="_blank" href="https://github.com/facebook/react-native/blob/master/Libraries/Lists/SectionList.js">Improve this page</a> by sending a pull request!</p><div class="docs-prevnext"><a class="docs-prev" href="docs/scrollview.html#content">← Prev</a><a class="docs-next" href="docs/segmentedcontrolios.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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