I am converting some of my default Animated stuff to react-native-reanimated v2 and can't seem to figure out how to interpolate a value to a string percentage. I also can't find anything related to this in the docs.
Using Animated from react-native I could just do:
width: widthAnim.interpolate({ inputRange: [0, 1], outputRange: ['0%', '100%'], }) But the interpolate() function from reanimated only takes number params, so how can I animate the width then?
interpolate(widthAnim.value, [0, 1], ['0%', '100%']) // err: Type 'string' is not assignable to type 'number'. 2 Answers
You can simply use template literal
width: `${widthAnim.value * 100}%` Check out more official example
A full example to complete the previous response:
const searchViewAnimatedWidth = useSharedValue(0); const searchBoxAnimatedStyle = useAnimatedStyle(() => { const interpolatedWidth = interpolate( searchViewAnimatedWidth.value, [0, 1], [40, 100], { extrapolateRight: Extrapolation.CLAMP } ); return { width: withTiming(`${interpolatedWidth}%`, { duration: 500, useNativeDriver: false, }), }; }); <Animated.View style={{...otherStyles,...searchBoxAnimatedStyle}}> ... </Animated.View> And in your trigger
onPress={() => { searchViewAnimatedWidth.value = searchViewAnimatedWidth.value == 0 ? 1 : 0; }} 
