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class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class=menu__list-item-collapsible><a class="menu__link menu__link--sublist menu__link--sublist-caret" role=button aria-expanded=false href=/docs/headless-js-android>Android and iOS guides</a></div><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class=menu__list-item-collapsible><a class="menu__link menu__link--sublist menu__link--sublist-caret" role=button aria-expanded=false href=/docs/legacy/native-modules-intro>Legacy Architecture</a></div></ul></nav></div></div></aside><main class=docMainContainer_a9sJ><div class="container padding-top--md padding-bottom--lg"><div class=row><div class="col docItemCol_Qr34"><div class=docItemContainer_tjFy><article><div class="tocCollapsible_wXna theme-doc-toc-mobile tocMobile_Ojys"><button type=button class="clean-btn tocCollapsibleButton_iI2p">On this page</button></div><div class="theme-doc-markdown markdown"><header><h1>Gesture Responder System</h1></header><p>The gesture responder system manages the lifecycle of gestures in your app. A touch can go through several phases as the app determines what the user's intention is. For example, the app needs to determine if the touch is scrolling, sliding on a widget, or tapping. This can even change during the duration of a touch. There can also be multiple simultaneous touches.</p>
5<p>The touch responder system is needed to allow components to negotiate these touch interactions without any additional knowledge about their parent or child components.</p>
6<h3 class="anchor anchorWithStickyNavbar_JmGV" id=best-practices>Best Practices<a href=#best-practices class=hash-link aria-label="Direct link to Best Practices" title="Direct link to Best Practices"></a></h3>
7<p>To make your app feel great, every action should have the following attributes:</p>
8<ul>
9<li>Feedback/highlighting- show the user what is handling their touch, and what will happen when they release the gesture</li>
10<li>Cancel-ability- when making an action, the user should be able to abort it mid-touch by dragging their finger away</li>
11</ul>
12<p>These features make users more comfortable while using an app, because it allows people to experiment and interact without fear of making mistakes.</p>
13<h3 class="anchor anchorWithStickyNavbar_JmGV" id=touchablehighlight-and-touchable>TouchableHighlight and Touchable*<a href=#touchablehighlight-and-touchable class=hash-link aria-label="Direct link to TouchableHighlight and Touchable*" title="Direct link to TouchableHighlight and Touchable*"></a></h3>
14<p>The responder system can be complicated to use. So we have provided an abstract <code>Touchable</code> implementation for things that should be "tappable". This uses the responder system and allows you to configure tap interactions declaratively. Use <code>TouchableHighlight</code> anywhere where you would use a button or link on web.</p>
15<h2 class="anchor anchorWithStickyNavbar_JmGV" id=responder-lifecycle>Responder Lifecycle<a href=#responder-lifecycle class=hash-link aria-label="Direct link to Responder Lifecycle" title="Direct link to Responder Lifecycle"></a></h2>
16<p>A view can become the touch responder by implementing the correct negotiation methods. There are two methods to ask the view if it wants to become responder:</p>
17<ul>
18<li><code>View.props.onStartShouldSetResponder: evt => true,</code> - Does this view want to become responder on the start of a touch?</li>
19<li><code>View.props.onMoveShouldSetResponder: evt => true,</code> - Called for every touch move on the View when it is not the responder: does this view want to "claim" touch responsiveness?</li>
20</ul>
21<p>If the View returns true and attempts to become the responder, one of the following will happen:</p>
22<ul>
23<li><code>View.props.onResponderGrant: evt => {}</code> - The View is now responding for touch events. This is the time to highlight and show the user what is happening</li>
24<li><code>View.props.onResponderReject: evt => {}</code> - Something else is the responder right now and will not release it</li>
25</ul>
26<p>If the view is responding, the following handlers can be called:</p>
27<ul>
28<li><code>View.props.onResponderMove: evt => {}</code> - The user is moving their finger</li>
29<li><code>View.props.onResponderRelease: evt => {}</code> - Fired at the end of the touch, ie "touchUp"</li>
30<li><code>View.props.onResponderTerminationRequest: evt => true</code> - Something else wants to become responder. Should this view release the responder? Returning true allows release</li>
31<li><code>View.props.onResponderTerminate: evt => {}</code> - The responder has been taken from the View. Might be taken by other views after a call to <code>onResponderTerminationRequest</code>, or might be taken by the OS without asking (happens with control center/ notification center on iOS)</li>
32</ul>
33<p><code>evt</code> is a synthetic touch event with the following form:</p>
34<ul>
35<li><code>nativeEvent</code>
36<ul>
37<li><code>changedTouches</code> - Array of all touch events that have changed since the last event</li>
38<li><code>identifier</code> - The ID of the touch</li>
39<li><code>locationX</code> - The X position of the touch, relative to the element</li>
40<li><code>locationY</code> - The Y position of the touch, relative to the element</li>
41<li><code>pageX</code> - The X position of the touch, relative to the root element</li>
42<li><code>pageY</code> - The Y position of the touch, relative to the root element</li>
43<li><code>target</code> - The node id of the element receiving the touch event</li>
44<li><code>timestamp</code> - A time identifier for the touch, useful for velocity calculation</li>
45<li><code>touches</code> - Array of all current touches on the screen</li>
46</ul>
47</li>
48</ul>
49<h3 class="anchor anchorWithStickyNavbar_JmGV" id=capture-shouldset-handlers>Capture ShouldSet Handlers<a href=#capture-shouldset-handlers class=hash-link aria-label="Direct link to Capture ShouldSet Handlers" title="Direct link to Capture ShouldSet Handlers"></a></h3>
50<p><code>onStartShouldSetResponder</code> and <code>onMoveShouldSetResponder</code> are called with a bubbling pattern, where the deepest node is called first. That means that the deepest component will become responder when multiple Views return true for <code>*ShouldSetResponder</code> handlers. This is desirable in most cases, because it makes sure all controls and buttons are usable.</p>
51<p>However, sometimes a parent will want to make sure that it becomes responder. This can be handled by using the capture phase. Before the responder system bubbles up from the deepest component, it will do a capture phase, firing <code>on*ShouldSetResponderCapture</code>. So if a parent View wants to prevent the child from becoming responder on a touch start, it should have a <code>onStartShouldSetResponderCapture</code> handler which returns true.</p>
52<ul>
53<li><code>View.props.onStartShouldSetResponderCapture: evt => true,</code></li>
54<li><code>View.props.onMoveShouldSetResponderCapture: evt => true,</code></li>
55</ul>
56<h3 class="anchor anchorWithStickyNavbar_JmGV" id=panresponder>PanResponder<a href=#panresponder class=hash-link aria-label="Direct link to PanResponder" title="Direct link to PanResponder"></a></h3>
57<p>For higher-level gesture interpretation, check out <a href=/docs/panresponder>PanResponder</a>.</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/gesture-responder-system.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/gesture-responder-system.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 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