Created
March 29, 2020 17:34
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React Query + React Navigation
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import React, { useEffect } from 'react'; | |
import { | |
StyleSheet, | |
View, | |
Text, | |
AppState, | |
Button, | |
} from 'react-native'; | |
import { Colors } from 'react-native/Libraries/NewAppScreen'; | |
import 'react-native-gesture-handler'; | |
import { NavigationContainer } from '@react-navigation/native'; | |
import { createStackNavigator } from '@react-navigation/stack'; | |
import { useFocusEffect } from '@react-navigation/native'; | |
import { useQuery as useReactQuery, setFocusHandler } from 'react-query'; | |
// refetch all queries on app focus | |
setFocusHandler((handleFocus) => { | |
function handler(state) { | |
if (state === 'active') { | |
handleFocus() | |
} | |
} | |
AppState.addEventListener('change', handler); | |
return () => { | |
AppState.removeEventListener('change', handler); | |
} | |
}) | |
function Query({ query }) { | |
return ( | |
<View style={styles.body}> | |
<View style={styles.sectionContainer}> | |
<Text style={styles.sectionTitle}>{query.status}</Text> | |
<Text style={styles.sectionDescription}> | |
Data: {query.data} | |
</Text> | |
<Text style={styles.sectionDescription}> | |
failureCount: {query.failureCount} | |
</Text> | |
<Text style={styles.sectionDescription}> | |
isFetching: {`${query.isFetching}`} | |
</Text> | |
</View> | |
</View> | |
) | |
} | |
function useQuery(...args) { | |
const query = useReactQuery(...args); | |
const isMountedRef = React.useRef(false); | |
useFocusEffect(React.useCallback(() => { | |
// do not refetch when query is initially mounted | |
if (isMountedRef.current) { | |
query.refetch() | |
} | |
}, [query.refetch])) | |
useEffect(() => { | |
isMountedRef.current = true; | |
}, []) | |
return query; | |
} | |
function Home({ navigation }) { | |
const query = useQuery('items-list', () => { | |
return new Promise((resolve, reject) => { | |
setTimeout(() => { | |
resolve([ | |
'first', | |
'second', | |
'third' | |
]) | |
}, 1000); | |
}); | |
}, | |
) | |
return ( | |
<> | |
<Query query={query} /> | |
{(query.data || []).map(item => { | |
return ( | |
<Button onPress={() => navigation.navigate('Details', { id: item })} title={item} key={item}></Button> | |
) | |
})} | |
</> | |
); | |
}; | |
function Details({ route }) { | |
const id = route.params.id; | |
const query = useQuery(['item-details', id], () => { | |
return new Promise((resolve, reject) => { | |
setTimeout(() => { | |
resolve(`${id} data`); | |
}, 1000); | |
}); | |
}, | |
) | |
return ( | |
<> | |
<Query query={query} /> | |
<Text>{route.params.id}</Text> | |
</> | |
); | |
}; | |
const Stack = createStackNavigator(); | |
function App() { | |
return ( | |
<> | |
<NavigationContainer> | |
<Stack.Navigator> | |
<Stack.Screen name="Home" component={Home} /> | |
<Stack.Screen name="Details" component={Details} /> | |
</Stack.Navigator> | |
</NavigationContainer> | |
</> | |
); | |
}; | |
const styles = StyleSheet.create({ | |
body: { | |
backgroundColor: Colors.white, | |
}, | |
sectionContainer: { | |
marginTop: 32, | |
paddingHorizontal: 24, | |
}, | |
sectionTitle: { | |
fontSize: 24, | |
fontWeight: '600', | |
color: Colors.black, | |
}, | |
sectionDescription: { | |
marginTop: 8, | |
fontSize: 18, | |
fontWeight: '400', | |
color: Colors.dark, | |
}, | |
}); | |
export default App; |
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